/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_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:14:15,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:14:15,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:14:16,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:14:16,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:14:16,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:14:16,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:14:16,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:14:16,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:14:16,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:14:16,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:14:16,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:14:16,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:14:16,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:14:16,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:14:16,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:14:16,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:14:16,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:14:16,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:14:16,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:14:16,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:14:16,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:14:16,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:14:16,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:14:16,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:14:16,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:14:16,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:14:16,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:14:16,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:14:16,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:14:16,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:14:16,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:14:16,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:14:16,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:14:16,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:14:16,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:14:16,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:14:16,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:14:16,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:14:16,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:14:16,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:14:16,137 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 20:14:16,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:14:16,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:14:16,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:14:16,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:14:16,184 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:14:16,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:14:16,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:14:16,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:14:16,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:14:16,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:14:16,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:14:16,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:14:16,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:14:16,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:14:16,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:14:16,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:14:16,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:14:16,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:14:16,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:14:16,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:14:16,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:14:16,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:14:16,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:14:16,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:14:16,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:14:16,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:14:16,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:14:16,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:14:16,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:14:16,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:14:16,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:14:16,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:14:16,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:14:16,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:14:16,595 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:14:16,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2020-10-27 20:14:16,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45da9665b/e29c4fd5d80545fbac89b49de8b03f3b/FLAGc0a11556b [2020-10-27 20:14:17,399 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:14:17,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2020-10-27 20:14:17,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45da9665b/e29c4fd5d80545fbac89b49de8b03f3b/FLAGc0a11556b [2020-10-27 20:14:17,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45da9665b/e29c4fd5d80545fbac89b49de8b03f3b [2020-10-27 20:14:17,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:14:17,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:14:17,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:14:17,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:14:17,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:14:17,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:14:17" (1/1) ... [2020-10-27 20:14:17,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1713cc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:17, skipping insertion in model container [2020-10-27 20:14:17,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:14:17" (1/1) ... [2020-10-27 20:14:17,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:14:17,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:14:17,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:14:17,980 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:14:17,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:14:18,011 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:14:18,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18 WrapperNode [2020-10-27 20:14:18,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:14:18,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:14:18,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:14:18,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:14:18,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (1/1) ... [2020-10-27 20:14:18,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:14:18,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:14:18,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:14:18,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:14:18,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (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 20:14:18,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:14:18,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:14:18,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:14:18,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:14:18,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:14:18,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:14:18,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:14:18,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:14:18,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:14:18,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:14:18,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:14:18,391 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:14:18,392 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:14:18,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:14:18 BoogieIcfgContainer [2020-10-27 20:14:18,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:14:18,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:14:18,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:14:18,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:14:18,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:14:17" (1/3) ... [2020-10-27 20:14:18,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4017a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:14:18, skipping insertion in model container [2020-10-27 20:14:18,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:18" (2/3) ... [2020-10-27 20:14:18,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4017a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:14:18, skipping insertion in model container [2020-10-27 20:14:18,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:14:18" (3/3) ... [2020-10-27 20:14:18,406 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2020-10-27 20:14:18,424 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:14:18,430 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:14:18,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:14:18,482 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:14:18,482 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:14:18,482 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:14:18,483 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:14:18,483 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:14:18,483 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:14:18,483 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:14:18,483 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:14:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:14:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:14:18,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:18,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:18,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 20:14:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:18,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868990741] [2020-10-27 20:14:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:19,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:14:19,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:19,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-27 20:14:19,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:14:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:14:19,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:19,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:19,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:19,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:14:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:19,481 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 20:14:19,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868990741] [2020-10-27 20:14:19,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:14:19,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:14:19,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280596925] [2020-10-27 20:14:19,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:14:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:19,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:14:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:14:19,510 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 20:14:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:19,589 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 20:14:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:14:19,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:14:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:19,600 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:14:19,600 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 20:14:19,604 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 20:14:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 20:14:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 20:14:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 20:14:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 20:14:19,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 20:14:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:19,648 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 20:14:19,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:14:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 20:14:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:14:19,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:19,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:19,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:14:19,650 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:19,651 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 20:14:19,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:19,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920015952] [2020-10-27 20:14:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:19,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:19,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:19,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:14:19,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:19,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 20:14:19,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:14:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:19,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:14:19,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:14:20,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:20,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:20,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:20,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:20,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:14:20,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:20,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:20,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:20,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:20,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:20,131 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 20:14:20,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920015952] [2020-10-27 20:14:20,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:14:20,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:14:20,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686101905] [2020-10-27 20:14:20,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:14:20,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:14:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:14:20,135 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-27 20:14:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:22,438 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 20:14:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:14:22,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:14:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:22,440 INFO L225 Difference]: With dead ends: 20 [2020-10-27 20:14:22,440 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:14:22,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:14:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:14:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:14:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:14:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 20:14:22,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 20:14:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:22,459 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 20:14:22,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:14:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 20:14:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:14:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:22,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:22,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:14:22,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 20:14:22,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:22,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139578850] [2020-10-27 20:14:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:22,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:22,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:22,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:14:22,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:22,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-27 20:14:22,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:14:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:14:22,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:22,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:22,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:22,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:22,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:22,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:22,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:14:22,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:22,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:22,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:22,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:22,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:22,932 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 20:14:22,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139578850] [2020-10-27 20:14:22,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:22,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:14:22,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878335351] [2020-10-27 20:14:22,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:14:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:14:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:14:22,938 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-27 20:14:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:23,193 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 20:14:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:14:23,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-27 20:14:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:23,194 INFO L225 Difference]: With dead ends: 21 [2020-10-27 20:14:23,194 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:14:23,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:14:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:14:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:14:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:14:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:14:23,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:14:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:23,202 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:14:23,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:14:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:14:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:14:23,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:23,203 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:23,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:14:23,203 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:23,204 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 20:14:23,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:23,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917378156] [2020-10-27 20:14:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:23,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:14:23,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 20:14:23,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:14:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:14:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:23,706 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 12 [2020-10-27 20:14:23,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:23,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:23,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:23,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:23,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:14:23,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:23,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:23,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:23,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:23,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:23,795 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 20:14:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917378156] [2020-10-27 20:14:23,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:23,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:14:23,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053210067] [2020-10-27 20:14:23,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:14:23,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:14:23,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:14:23,798 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-27 20:14:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:24,107 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 20:14:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:14:24,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-27 20:14:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:24,109 INFO L225 Difference]: With dead ends: 22 [2020-10-27 20:14:24,109 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:14:24,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:14:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:14:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:14:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:14:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:14:24,116 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 20:14:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:24,116 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:14:24,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:14:24,117 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:14:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:14:24,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:24,117 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:24,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:14:24,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 20:14:24,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:24,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712968225] [2020-10-27 20:14:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:24,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:24,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:24,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:14:24,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:24,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 20:14:24,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:24,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:14:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:14:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:28,002 WARN L838 $PredicateComparison]: unable to prove that (<= (+ (* 2863311531 c_main_~y~0) 2863311528) (* 4294967296 (div (+ (* c_main_~y~0 2863311531) 2863311528) 4294967296))) is different from false [2020-10-27 20:14:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:28,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:28,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:28,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:28,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:28,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:28,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:28,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:28,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2020-10-27 20:14:28,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712968225] [2020-10-27 20:14:28,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:28,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:14:28,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976101470] [2020-10-27 20:14:28,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:14:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:14:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=44, Unknown=1, NotChecked=12, Total=72 [2020-10-27 20:14:28,117 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 20:14:30,373 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#t~string5.base| |c_old(#t~string5.base)|) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ (* 2863311531 c_main_~y~0) 2863311528) (* 4294967296 (div (+ (* c_main_~y~0 2863311531) 2863311528) 4294967296))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (= |c_old(#valid)| |c_#valid|)) is different from false [2020-10-27 20:14:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:30,494 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-27 20:14:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:14:30,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 20:14:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:30,496 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:14:30,497 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:14:30,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=34, Invalid=104, Unknown=2, NotChecked=42, Total=182 [2020-10-27 20:14:30,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:14:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 20:14:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:14:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 20:14:30,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 20:14:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:30,505 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 20:14:30,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:14:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 20:14:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:14:30,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:30,506 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:30,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:14:30,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 20:14:30,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:30,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199299590] [2020-10-27 20:14:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:30,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:30,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:14:30,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:30,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 20:14:30,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:30,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:14:30,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:14:30,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:37,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:37,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:37,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:37,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:37,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:37,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:37,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:37,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:37,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:37,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199299590] [2020-10-27 20:14:37,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:37,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:14:37,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173747480] [2020-10-27 20:14:37,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:14:37,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:14:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=69, Unknown=3, NotChecked=0, Total=90 [2020-10-27 20:14:37,114 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-27 20:14:40,263 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:14:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:47,352 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:14:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:14:47,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-27 20:14:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:47,354 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:14:47,354 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:14:47,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=52, Invalid=216, Unknown=4, NotChecked=0, Total=272 [2020-10-27 20:14:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:14:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:14:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:14:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:14:47,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 20:14:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:47,367 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:14:47,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:14:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:14:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:14:47,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:47,368 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:47,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:14:47,368 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 20:14:47,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:47,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938636071] [2020-10-27 20:14:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:47,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:47,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:14:47,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 20:14:47,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:14:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:14:47,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:47,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:47,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:47,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:47,831 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 20:14:47,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938636071] [2020-10-27 20:14:47,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:47,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:14:47,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629389249] [2020-10-27 20:14:47,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:14:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:14:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:14:47,836 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 20:14:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:48,186 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 20:14:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:14:48,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 20:14:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:48,187 INFO L225 Difference]: With dead ends: 25 [2020-10-27 20:14:48,188 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:14:48,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:14:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:14:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:14:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:14:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 20:14:48,196 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 20:14:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:48,197 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 20:14:48,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:14:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 20:14:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:14:48,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:48,198 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:48,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:14:48,198 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 20:14:48,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:48,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418825230] [2020-10-27 20:14:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:48,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:48,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:48,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:14:48,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:48,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 20:14:48,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:14:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:48,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:14:48,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:48,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:48,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:48,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:48,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:48,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:48,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:14:48,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:48,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:48,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:48,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418825230] [2020-10-27 20:14:48,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:48,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:14:48,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29553028] [2020-10-27 20:14:48,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:14:48,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:48,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:14:48,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:14:48,805 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2020-10-27 20:14:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:49,531 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 20:14:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:14:49,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-27 20:14:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:49,533 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:14:49,534 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:14:49,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:14:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:14:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 20:14:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:14:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 20:14:49,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 20:14:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:49,543 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 20:14:49,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:14:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 20:14:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:14:49,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:49,544 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:49,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:14:49,544 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 20:14:49,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:49,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475141626] [2020-10-27 20:14:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:49,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:14:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:14:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:49,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:49,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:49,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:49,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:49,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:49,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:49,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:49,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475141626] [2020-10-27 20:14:49,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:49,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:14:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035953748] [2020-10-27 20:14:49,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:14:49,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:14:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:14:49,896 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-27 20:14:52,271 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:14:52,601 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-27 20:14:52,834 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-27 20:14:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:52,837 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 20:14:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:14:52,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-27 20:14:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:52,837 INFO L225 Difference]: With dead ends: 20 [2020-10-27 20:14:52,838 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:14:52,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=75, Invalid=134, Unknown=1, NotChecked=0, Total=210 [2020-10-27 20:14:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:14:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:14:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:14:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:14:52,839 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-27 20:14:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:52,839 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:14:52,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:14:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:14:52,839 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:14:52,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:14:52,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:14:55,375 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 81 DAG size of output: 18 [2020-10-27 20:14:57,073 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 217 DAG size of output: 105 [2020-10-27 20:14:57,077 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:14:57,078 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:14:57,078 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:14:57,078 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:14:57,078 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:14:57,078 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 20:14:57,078 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:14:57,078 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:14:57,079 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:14:57,079 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:14:57,079 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:14:57,079 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2020-10-27 20:14:57,079 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 22) no Hoare annotation was computed. [2020-10-27 20:14:57,080 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse5 (div main_~x~0 4294967296))) (let ((.cse4 (+ main_~y~0 1)) (.cse3 (* 4294967296 .cse5))) (or (and (<= 4 main_~x~0) (<= main_~y~0 16) (<= 1 (+ main_~y~0 (* 3 (div (+ (* main_~y~0 (- 357913941)) 357913936) 1073741824)))) (<= main_~x~0 4)) (and (<= 1 main_~x~0) (<= 2 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 2)) (and (<= main_~y~0 4) (<= 2 main_~x~0) (<= 1 (+ main_~y~0 (* 3 (div (+ (* main_~y~0 (- 89478485)) 89478484) 268435456)))) (<= main_~x~0 2)) (let ((.cse2 (div main_~y~0 4294967296))) (and (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 2)) 4294967296)) 6)) (<= (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~y~0 .cse1) 3))) (+ (* 4294967295 (div (+ main_~y~0 (* .cse0 (- 3)) .cse1) 4294967296)) (* 3 .cse0) (* 4294967295 .cse2) 1))) main_~y~0) (<= .cse2 0) (<= (+ .cse3 6) main_~x~0))) (and (<= main_~x~0 3) (<= main_~y~0 8) (<= 3 main_~x~0) (<= .cse4 (* 3 (div (+ (* main_~y~0 178956971) 178956968) 536870912)))) (and (< 0 (+ .cse5 1)) (<= main_~x~0 5) (<= .cse4 (* 3 (div (+ (* main_~y~0 715827883) 715827872) 2147483648))) (<= (+ .cse3 5) main_~x~0) (<= main_~y~0 32)) (and (<= 0 main_~x~0) (<= main_~x~0 0) (<= 1 main_~y~0) (<= main_~y~0 1))))) [2020-10-27 20:14:57,080 INFO L270 CegarLoopResult]: At program point L16-3(lines 16 19) the Hoare annotation is: (not (= (let ((.cse2 (div main_~y~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~y~0 .cse1) 3))) (+ (* (div (+ main_~y~0 (* .cse0 (- 3)) .cse1) 4294967296) 4294967296) (* .cse0 3) (* .cse2 4294967296))))) main_~y~0)) [2020-10-27 20:14:57,082 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 22) no Hoare annotation was computed. [2020-10-27 20:14:57,082 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-27 20:14:57,082 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-27 20:14:57,082 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-27 20:14:57,082 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-27 20:14:57,083 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-27 20:14:57,083 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-27 20:14:57,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:14:57 BoogieIcfgContainer [2020-10-27 20:14:57,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:14:57,125 INFO L168 Benchmark]: Toolchain (without parser) took 39354.82 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 126.5 MB in the beginning and 114.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 98.2 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:57,127 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:14:57,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.63 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 117.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:57,129 INFO L168 Benchmark]: Boogie Preprocessor took 33.60 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:57,134 INFO L168 Benchmark]: RCFGBuilder took 347.35 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 103.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:57,134 INFO L168 Benchmark]: TraceAbstraction took 38727.06 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 102.9 MB in the beginning and 114.8 MB in the end (delta: -11.9 MB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:57,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.63 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 117.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.60 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 347.35 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 103.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 38727.06 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 102.9 MB in the beginning and 114.8 MB in the end (delta: -11.9 MB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((((4 <= x && y <= 16) && 1 <= y + 3 * ((y * -357913941 + 357913936) / 1073741824)) && x <= 4) || (((1 <= x && 2 <= y) && x <= 1) && y <= 2)) || (((y <= 4 && 2 <= x) && 1 <= y + 3 * ((y * -89478485 + 89478484) / 268435456)) && x <= 2)) || (((x <= 4294967296 * ((x + -2) / 4294967296) + 6 && 4294967295 * ((y + (y + y / 4294967296 * -4294967296) / 3 * -3 + y / 4294967296 * -4294967296) / 4294967296) + 3 * ((y + y / 4294967296 * -4294967296) / 3) + 4294967295 * (y / 4294967296) + 1 <= y) && y / 4294967296 <= 0) && 4294967296 * (x / 4294967296) + 6 <= x)) || (((x <= 3 && y <= 8) && 3 <= x) && y + 1 <= 3 * ((y * 178956971 + 178956968) / 536870912))) || ((((0 < x / 4294967296 + 1 && x <= 5) && y + 1 <= 3 * ((y * 715827883 + 715827872) / 2147483648)) && 4294967296 * (x / 4294967296) + 5 <= x) && y <= 32)) || (((0 <= x && x <= 0) && 1 <= y) && y <= 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.3s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 19.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 67 SDslu, 239 SDs, 0 SdLazy, 405 SolverSat, 73 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 25.5s 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, 9 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 33 PreInvPairs, 46 NumberOfFragments, 281 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1364 FormulaSimplificationTreeSizeReductionInter, 4.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 17064 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 19/84 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 correct! Received shutdown request...