/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/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:28:33,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:28:33,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:28:33,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:28:33,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:28:33,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:28:33,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:28:33,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:28:33,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:28:33,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:28:33,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:28:33,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:28:33,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:28:33,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:28:33,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:28:33,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:28:33,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:28:33,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:28:33,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:28:33,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:28:33,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:28:33,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:28:33,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:28:33,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:28:33,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:28:33,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:28:33,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:28:33,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:28:33,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:28:33,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 22:28:33,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 22:28:33,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 22:28:33,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 22:28:33,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 22:28:33,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 22:28:33,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 22:28:33,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 22:28:33,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 22:28:33,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:28:33,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:28:33,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:28:33,409 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 22:28:33,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:28:33,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:28:33,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:28:33,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:28:33,459 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:28:33,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:28:33,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:28:33,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:28:33,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:28:33,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:28:33,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:28:33,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:28:33,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:28:33,461 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:28:33,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:28:33,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:28:33,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:28:33,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:28:33,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:28:33,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:28:33,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:28:33,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:28:33,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:28:33,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:28:33,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:28:33,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:28:33,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:28:33,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:28:33,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:28:33,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:28:33,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:28:33,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:28:33,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:28:33,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:28:33,876 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:28:33,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-27 22:28:33,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db705da72/962bcc9054b94b84ad0963f0002ed110/FLAG95fead0c5 [2020-10-27 22:28:34,568 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:28:34,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-27 22:28:34,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db705da72/962bcc9054b94b84ad0963f0002ed110/FLAG95fead0c5 [2020-10-27 22:28:34,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db705da72/962bcc9054b94b84ad0963f0002ed110 [2020-10-27 22:28:34,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:28:34,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:28:34,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:28:34,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:28:34,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:28:34,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:28:34" (1/1) ... [2020-10-27 22:28:34,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44019f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:34, skipping insertion in model container [2020-10-27 22:28:34,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:28:34" (1/1) ... [2020-10-27 22:28:34,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:28:34,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:28:35,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:28:35,146 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:28:35,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:28:35,183 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:28:35,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35 WrapperNode [2020-10-27 22:28:35,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:28:35,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:28:35,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:28:35,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:28:35,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (1/1) ... [2020-10-27 22:28:35,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:28:35,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:28:35,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:28:35,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:28:35,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (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 22:28:35,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:28:35,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:28:35,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:28:35,315 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-27 22:28:35,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:28:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:28:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:28:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:28:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:28:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:28:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-27 22:28:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:28:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:28:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:28:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:28:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:28:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:28:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:28:35,722 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:28:35,722 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 22:28:35,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:28:35 BoogieIcfgContainer [2020-10-27 22:28:35,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:28:35,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:28:35,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:28:35,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:28:35,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:28:34" (1/3) ... [2020-10-27 22:28:35,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46df6090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:28:35, skipping insertion in model container [2020-10-27 22:28:35,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:28:35" (2/3) ... [2020-10-27 22:28:35,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46df6090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:28:35, skipping insertion in model container [2020-10-27 22:28:35,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:28:35" (3/3) ... [2020-10-27 22:28:35,735 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-10-27 22:28:35,749 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:28:35,755 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:28:35,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:28:35,804 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:28:35,804 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:28:35,804 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:28:35,804 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:28:35,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:28:35,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:28:35,805 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:28:35,805 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:28:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 22:28:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 22:28:35,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:35,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:35,861 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:35,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1045360095, now seen corresponding path program 1 times [2020-10-27 22:28:35,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:35,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011988127] [2020-10-27 22:28:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:36,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:36,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:36,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 22:28:36,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:28:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-27 22:28:36,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 22:28:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:28:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 22:28:36,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:36,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:36,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:36,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:36,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 22:28:36,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:36,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:36,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:36,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:36,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:36,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:28:36,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:36,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 22:28:36,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 22:28:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:28:37,018 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 22:28:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011988127] [2020-10-27 22:28:37,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:37,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 22:28:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645841355] [2020-10-27 22:28:37,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 22:28:37,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 22:28:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 22:28:37,048 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-27 22:28:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:37,583 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-10-27 22:28:37,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 22:28:37,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 22:28:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:37,596 INFO L225 Difference]: With dead ends: 44 [2020-10-27 22:28:37,596 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 22:28:37,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:28:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 22:28:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 22:28:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 22:28:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-27 22:28:37,655 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2020-10-27 22:28:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:37,655 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-27 22:28:37,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 22:28:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-27 22:28:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 22:28:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:37,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:37,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:28:37,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1752822076, now seen corresponding path program 1 times [2020-10-27 22:28:37,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:37,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146794373] [2020-10-27 22:28:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:37,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:37,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:37,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 22:28:37,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:28:37,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 22:28:37,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:28:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:28:37,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:28:37,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:38,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:38,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:38,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:38,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 22:28:38,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:38,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:38,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:38,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:38,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:38,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:38,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:38,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:28:38,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:38,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 22:28:38,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:38,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:28:38,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:38,113 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 22:28:38,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146794373] [2020-10-27 22:28:38,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:38,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 22:28:38,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85101588] [2020-10-27 22:28:38,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:28:38,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:28:38,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:28:38,118 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-10-27 22:28:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:38,537 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-27 22:28:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:28:38,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 22:28:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:38,540 INFO L225 Difference]: With dead ends: 33 [2020-10-27 22:28:38,540 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 22:28:38,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 22:28:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 22:28:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-27 22:28:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 22:28:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-27 22:28:38,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2020-10-27 22:28:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:38,552 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-27 22:28:38,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:28:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-27 22:28:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 22:28:38,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:38,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:38,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:28:38,554 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1214823211, now seen corresponding path program 1 times [2020-10-27 22:28:38,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:38,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038191652] [2020-10-27 22:28:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:39,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:39,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 22:28:39,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:28:39,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-27 22:28:39,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:39,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:28:39,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:28:39,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:28:39,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:39,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:39,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:39,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:39,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:39,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:39,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:28:39,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:39,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:39,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:39,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:39,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:39,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:39,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:39,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 22:28:39,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:39,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 22:28:39,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:28:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:28:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:28:39,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:39,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-27 22:28:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:39,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:39,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:28:39,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:39,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:28:39,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:28:39,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:28:39,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 22:28:39,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038191652] [2020-10-27 22:28:39,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:39,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 22:28:39,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009565118] [2020-10-27 22:28:39,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 22:28:39,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:39,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 22:28:39,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:28:39,456 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-10-27 22:28:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:39,928 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-27 22:28:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 22:28:39,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 22:28:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:39,931 INFO L225 Difference]: With dead ends: 39 [2020-10-27 22:28:39,931 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 22:28:39,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:28:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 22:28:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-27 22:28:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 22:28:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-27 22:28:39,941 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2020-10-27 22:28:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:39,942 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-27 22:28:39,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 22:28:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-27 22:28:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 22:28:39,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:39,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:39,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:28:39,944 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash -16297623, now seen corresponding path program 1 times [2020-10-27 22:28:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:39,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234298611] [2020-10-27 22:28:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:40,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 22:28:40,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:28:40,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 22:28:40,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:28:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 22:28:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:28:40,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:40,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:40,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:40,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:40,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:28:40,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:40,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:40,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:40,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:40,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:40,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:40,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:40,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 22:28:40,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:40,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 22:28:40,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:28:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:28:40,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:28:40,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:40,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-27 22:28:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:40,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 22:28:40,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:40,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 22:28:40,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:40,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:40,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:28:40,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:28:40,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 22:28:40,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234298611] [2020-10-27 22:28:40,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:40,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 22:28:40,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543491317] [2020-10-27 22:28:40,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:28:40,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:28:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:28:40,295 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 7 states. [2020-10-27 22:28:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:40,563 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-27 22:28:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:28:40,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 22:28:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:40,565 INFO L225 Difference]: With dead ends: 39 [2020-10-27 22:28:40,565 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 22:28:40,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:28:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 22:28:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-27 22:28:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 22:28:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-27 22:28:40,574 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 25 [2020-10-27 22:28:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:40,574 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-27 22:28:40,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:28:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-27 22:28:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 22:28:40,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:40,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:40,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:28:40,576 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -962370060, now seen corresponding path program 1 times [2020-10-27 22:28:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:40,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353323623] [2020-10-27 22:28:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:40,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:41,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 22:28:41,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:28:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 22:28:41,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:28:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 22:28:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 22:28:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:41,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:41,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:41,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:41,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:28:41,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:41,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:41,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:41,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 22:28:41,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:28:41,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 22:28:41,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:28:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:28:41,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:41,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-27 22:28:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:41,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:41,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:28:41,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:28:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 22:28:41,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:28:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:28:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 22:28:41,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353323623] [2020-10-27 22:28:41,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:28:41,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 22:28:41,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095741992] [2020-10-27 22:28:41,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:28:41,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:28:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:28:41,629 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 11 states. [2020-10-27 22:28:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:42,185 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-27 22:28:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 22:28:42,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 22:28:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:42,187 INFO L225 Difference]: With dead ends: 36 [2020-10-27 22:28:42,187 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 22:28:42,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 22:28:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 22:28:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-27 22:28:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 22:28:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 22:28:42,195 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 26 [2020-10-27 22:28:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:42,196 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 22:28:42,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:28:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 22:28:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 22:28:42,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:42,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:42,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:28:42,198 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash -712052588, now seen corresponding path program 1 times [2020-10-27 22:28:42,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:42,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726126627] [2020-10-27 22:28:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:42,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 22:28:42,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:28:42,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-27 22:28:42,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:28:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 22:28:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 22:28:42,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:42,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:42,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:42,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:42,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:42,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 22:28:42,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:42,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:42,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:42,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 22:28:42,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:28:42,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 22:28:42,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:42,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:28:42,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:28:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-27 22:28:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:42,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:42,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:42,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:28:42,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 22:28:42,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:28:42,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 22:28:42,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726126627] [2020-10-27 22:28:42,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:42,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 22:28:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767648324] [2020-10-27 22:28:42,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 22:28:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:42,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 22:28:42,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 22:28:42,993 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-10-27 22:28:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:43,314 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-27 22:28:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 22:28:43,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-27 22:28:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:43,316 INFO L225 Difference]: With dead ends: 37 [2020-10-27 22:28:43,316 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 22:28:43,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 22:28:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 22:28:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 22:28:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 22:28:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-27 22:28:43,326 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 26 [2020-10-27 22:28:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:43,326 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-27 22:28:43,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 22:28:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-27 22:28:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 22:28:43,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:43,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:43,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 22:28:43,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1034931100, now seen corresponding path program 1 times [2020-10-27 22:28:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:43,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766549430] [2020-10-27 22:28:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:43,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:46,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 22:28:46,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 22:28:46,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2918 [2020-10-27 22:28:46,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:46,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:28:46,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 22:28:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:28:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:46,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:46,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:46,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:28:46,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:46,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:46,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:46,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 22:28:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:47,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:47,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 22:28:47,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 22:28:47,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-27 22:28:47,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:47,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:28:47,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:47,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 22:28:47,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:47,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-27 22:28:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:47,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:47,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:47,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:47,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 22:28:47,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 22:28:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 22:28:47,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:28:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:28:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:28:47,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-27 22:28:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:47,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:47,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:28:47,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:47,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 22:28:47,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:28:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:28:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 22:28:47,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766549430] [2020-10-27 22:28:47,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:47,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 22:28:47,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195260586] [2020-10-27 22:28:47,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 22:28:47,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 22:28:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:28:47,460 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 9 states. [2020-10-27 22:28:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:47,816 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-10-27 22:28:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 22:28:47,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 22:28:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:47,818 INFO L225 Difference]: With dead ends: 32 [2020-10-27 22:28:47,819 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 22:28:47,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:28:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 22:28:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 22:28:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 22:28:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 22:28:47,820 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-10-27 22:28:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:47,821 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 22:28:47,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 22:28:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 22:28:47,823 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 22:28:47,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 22:28:47,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 22:28:48,056 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 22:28:48,056 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 22:28:48,056 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 22:28:48,056 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 22:28:48,057 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 22:28:48,057 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 22:28:48,057 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 22:28:48,057 INFO L274 CegarLoopResult]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2020-10-27 22:28:48,057 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-10-27 22:28:48,057 INFO L274 CegarLoopResult]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2020-10-27 22:28:48,058 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-27 22:28:48,058 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-10-27 22:28:48,059 INFO L274 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-10-27 22:28:48,059 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-27 22:28:48,059 INFO L277 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-10-27 22:28:48,059 INFO L274 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-10-27 22:28:48,059 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-27 22:28:48,059 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 22:28:48,059 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 22:28:48,060 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 22:28:48,060 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 22:28:48,060 INFO L274 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-10-27 22:28:48,060 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2020-10-27 22:28:48,060 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 30 45) no Hoare annotation was computed. [2020-10-27 22:28:48,060 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-10-27 22:28:48,060 INFO L274 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-10-27 22:28:48,060 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-10-27 22:28:48,061 INFO L277 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-10-27 22:28:48,061 INFO L274 CegarLoopResult]: For program point L40-1(lines 30 45) no Hoare annotation was computed. [2020-10-27 22:28:48,061 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-27 22:28:48,061 INFO L274 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-10-27 22:28:48,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 10:28:48 BoogieIcfgContainer [2020-10-27 22:28:48,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 22:28:48,073 INFO L168 Benchmark]: Toolchain (without parser) took 13143.80 ms. Allocated memory was 151.0 MB in the beginning and 331.4 MB in the end (delta: 180.4 MB). Free memory was 126.9 MB in the beginning and 219.2 MB in the end (delta: -92.3 MB). Peak memory consumption was 88.7 MB. Max. memory is 8.0 GB. [2020-10-27 22:28:48,075 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 22:28:48,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.32 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 22:28:48,084 INFO L168 Benchmark]: Boogie Preprocessor took 37.29 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 22:28:48,085 INFO L168 Benchmark]: RCFGBuilder took 501.59 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 101.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-27 22:28:48,085 INFO L168 Benchmark]: TraceAbstraction took 12342.09 ms. Allocated memory was 151.0 MB in the beginning and 331.4 MB in the end (delta: 180.4 MB). Free memory was 101.0 MB in the beginning and 219.2 MB in the end (delta: -118.1 MB). Peak memory consumption was 63.6 MB. Max. memory is 8.0 GB. [2020-10-27 22:28:48,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.32 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.29 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 501.59 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 101.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12342.09 ms. Allocated memory was 151.0 MB in the beginning and 331.4 MB in the end (delta: 180.4 MB). Free memory was 101.0 MB in the beginning and 219.2 MB in the end (delta: -118.1 MB). Peak memory consumption was 63.6 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 206 SDslu, 226 SDs, 0 SdLazy, 709 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 22 PreInvPairs, 22 NumberOfFragments, 68 HoareAnnotationTreeSize, 22 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 175 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 12867 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 32/34 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...