/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/array-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 13:59:48,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 13:59:48,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 13:59:48,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 13:59:48,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 13:59:48,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 13:59:48,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 13:59:48,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 13:59:48,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 13:59:48,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 13:59:48,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 13:59:48,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 13:59:48,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 13:59:48,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 13:59:48,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 13:59:48,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 13:59:48,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 13:59:48,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 13:59:48,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 13:59:48,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 13:59:48,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 13:59:48,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 13:59:48,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 13:59:48,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 13:59:48,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 13:59:48,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 13:59:48,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 13:59:48,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 13:59:48,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 13:59:48,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 13:59:48,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 13:59:48,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 13:59:48,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 13:59:48,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 13:59:48,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 13:59:48,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 13:59:48,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 13:59:48,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 13:59:48,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 13:59:48,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 13:59:48,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 13:59:48,461 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 13:59:48,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 13:59:48,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 13:59:48,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 13:59:48,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 13:59:48,520 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 13:59:48,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 13:59:48,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 13:59:48,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 13:59:48,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 13:59:48,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 13:59:48,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 13:59:48,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 13:59:48,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 13:59:48,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 13:59:48,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 13:59:48,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 13:59:48,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 13:59:48,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 13:59:48,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 13:59:48,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 13:59:48,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 13:59:48,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 13:59:48,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 13:59:48,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 13:59:48,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 13:59:48,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 13:59:48,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 13:59:48,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 13:59:48,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 13:59:48,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 13:59:48,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 13:59:49,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 13:59:49,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 13:59:49,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 13:59:49,044 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 13:59:49,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_pair_sum_const.c [2020-10-27 13:59:49,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c5e886ba/55d70e849ed94f01bce12a98e6dd2214/FLAG07d8bb6e7 [2020-10-27 13:59:49,798 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 13:59:49,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_pair_sum_const.c [2020-10-27 13:59:49,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c5e886ba/55d70e849ed94f01bce12a98e6dd2214/FLAG07d8bb6e7 [2020-10-27 13:59:50,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c5e886ba/55d70e849ed94f01bce12a98e6dd2214 [2020-10-27 13:59:50,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 13:59:50,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 13:59:50,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 13:59:50,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 13:59:50,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 13:59:50,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0f4754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50, skipping insertion in model container [2020-10-27 13:59:50,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 13:59:50,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 13:59:50,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 13:59:50,386 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 13:59:50,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 13:59:50,428 INFO L208 MainTranslator]: Completed translation [2020-10-27 13:59:50,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50 WrapperNode [2020-10-27 13:59:50,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 13:59:50,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 13:59:50,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 13:59:50,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 13:59:50,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (1/1) ... [2020-10-27 13:59:50,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 13:59:50,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 13:59:50,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 13:59:50,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 13:59:50,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (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 13:59:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 13:59:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 13:59:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 13:59:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 13:59:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 13:59:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 13:59:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 13:59:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 13:59:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 13:59:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 13:59:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 13:59:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 13:59:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 13:59:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 13:59:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 13:59:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 13:59:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 13:59:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 13:59:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 13:59:51,134 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 13:59:51,134 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 13:59:51,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:59:51 BoogieIcfgContainer [2020-10-27 13:59:51,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 13:59:51,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 13:59:51,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 13:59:51,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 13:59:51,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:59:50" (1/3) ... [2020-10-27 13:59:51,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45eb5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:59:51, skipping insertion in model container [2020-10-27 13:59:51,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:50" (2/3) ... [2020-10-27 13:59:51,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45eb5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:59:51, skipping insertion in model container [2020-10-27 13:59:51,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:59:51" (3/3) ... [2020-10-27 13:59:51,147 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2020-10-27 13:59:51,160 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 13:59:51,193 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 13:59:51,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 13:59:51,239 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 13:59:51,239 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 13:59:51,240 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 13:59:51,240 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 13:59:51,240 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 13:59:51,240 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 13:59:51,240 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 13:59:51,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 13:59:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 13:59:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 13:59:51,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 13:59:51,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 13:59:51,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 13:59:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 13:59:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash 875303383, now seen corresponding path program 1 times [2020-10-27 13:59:51,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 13:59:51,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075912768] [2020-10-27 13:59:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 13:59:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:51,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:51,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:51,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:51,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 13:59:51,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 13:59:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-27 13:59:51,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:51,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 13:59:51,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 13:59:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 13:59:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 13:59:51,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 13:59:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:51,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:51,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 13:59:51,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 13:59:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 13:59:51,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 13:59:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 13:59:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 13:59:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 13:59:51,999 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 13:59:52,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075912768] [2020-10-27 13:59:52,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 13:59:52,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 13:59:52,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773772263] [2020-10-27 13:59:52,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 13:59:52,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 13:59:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 13:59:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 13:59:52,027 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-27 13:59:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 13:59:52,139 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-27 13:59:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 13:59:52,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-27 13:59:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 13:59:52,150 INFO L225 Difference]: With dead ends: 51 [2020-10-27 13:59:52,150 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 13:59:52,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 13:59:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 13:59:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 13:59:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 13:59:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 13:59:52,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-10-27 13:59:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 13:59:52,201 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 13:59:52,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 13:59:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 13:59:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 13:59:52,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 13:59:52,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 13:59:52,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 13:59:52,203 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 13:59:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 13:59:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash -991624035, now seen corresponding path program 1 times [2020-10-27 13:59:52,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 13:59:52,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202485209] [2020-10-27 13:59:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 13:59:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:52,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:52,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:52,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:52,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 13:59:52,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 13:59:52,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 13:59:52,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 13:59:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 13:59:52,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 13:59:52,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 13:59:52,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 13:59:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:52,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:52,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 13:59:52,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 13:59:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 13:59:52,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 13:59:52,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 13:59:52,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 13:59:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 13:59:52,671 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 13:59:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202485209] [2020-10-27 13:59:52,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 13:59:52,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 13:59:52,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036932937] [2020-10-27 13:59:52,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 13:59:52,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 13:59:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 13:59:52,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 13:59:52,694 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-27 13:59:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 13:59:52,852 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-27 13:59:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 13:59:52,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 13:59:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 13:59:52,854 INFO L225 Difference]: With dead ends: 45 [2020-10-27 13:59:52,855 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 13:59:52,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 13:59:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 13:59:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 13:59:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 13:59:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 13:59:52,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-27 13:59:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 13:59:52,865 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 13:59:52,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 13:59:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 13:59:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 13:59:52,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 13:59:52,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 13:59:52,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 13:59:52,867 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 13:59:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 13:59:52,868 INFO L82 PathProgramCache]: Analyzing trace with hash 9553057, now seen corresponding path program 1 times [2020-10-27 13:59:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 13:59:52,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803683558] [2020-10-27 13:59:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 13:59:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:52,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:52,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:53,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:53,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:53,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 13:59:53,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 13:59:53,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-27 13:59:53,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:53,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 13:59:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 13:59:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 13:59:53,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 13:59:53,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 13:59:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:53,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:53,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:53,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 13:59:53,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 13:59:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 13:59:53,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 13:59:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 13:59:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 13:59:53,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 13:59:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 13:59:53,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803683558] [2020-10-27 13:59:53,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 13:59:53,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 13:59:53,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576562837] [2020-10-27 13:59:53,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 13:59:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 13:59:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 13:59:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 13:59:53,398 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-27 13:59:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 13:59:53,646 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-27 13:59:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 13:59:53,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 13:59:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 13:59:53,650 INFO L225 Difference]: With dead ends: 52 [2020-10-27 13:59:53,651 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 13:59:53,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 13:59:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 13:59:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-27 13:59:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 13:59:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 13:59:53,665 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-10-27 13:59:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 13:59:53,665 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 13:59:53,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 13:59:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 13:59:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 13:59:53,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 13:59:53,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 13:59:53,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 13:59:53,667 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 13:59:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 13:59:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1194062501, now seen corresponding path program 2 times [2020-10-27 13:59:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 13:59:53,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643944265] [2020-10-27 13:59:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 13:59:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:54,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:54,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:56,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:56,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 13:59:56,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 13:59:56,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2386 [2020-10-27 13:59:56,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 13:59:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 13:59:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 13:59:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 13:59:56,505 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-10-27 13:59:56,828 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 13:59:57,140 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-27 13:59:57,653 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-27 13:59:57,992 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-27 13:59:58,414 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2020-10-27 13:59:58,925 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2020-10-27 13:59:59,513 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 60 [2020-10-27 13:59:59,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 13:59:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 13:59:59,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 13:59:59,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 13:59:59,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 13:59:59,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 13:59:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 13:59:59,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 13:59:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 13:59:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 13:59:59,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 13:59:59,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:00:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:00:00,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643944265] [2020-10-27 14:00:00,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:00:00,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:00:00,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270339924] [2020-10-27 14:00:00,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:00:00,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:00:00,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:00:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:00:00,008 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 18 states. [2020-10-27 14:00:00,415 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-27 14:00:00,772 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-27 14:00:01,311 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-27 14:00:01,715 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-27 14:00:02,185 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-27 14:00:02,826 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 87 [2020-10-27 14:00:03,057 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-27 14:00:03,385 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-27 14:00:03,607 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 14:00:03,763 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-27 14:00:03,926 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 14:00:04,135 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 14:00:04,424 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 14:00:04,827 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 14:00:05,547 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-27 14:00:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:00:05,800 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-27 14:00:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:00:05,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2020-10-27 14:00:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:00:05,803 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:00:05,803 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:00:05,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:00:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:00:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-10-27 14:00:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:00:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-27 14:00:05,828 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2020-10-27 14:00:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:00:05,829 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-27 14:00:05,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:00:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-27 14:00:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 14:00:05,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:00:05,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:00:05,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:00:05,831 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:00:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:00:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash 631612679, now seen corresponding path program 3 times [2020-10-27 14:00:05,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:00:05,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452726734] [2020-10-27 14:00:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:00:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:05,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:05,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:06,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:08,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:08,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:00:08,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:00:08,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2794 [2020-10-27 14:00:08,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:00:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:00:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:00:08,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:08,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:00:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:08,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:08,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:08,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:00:08,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:08,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:00:08,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:00:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:08,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:00:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:00:08,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452726734] [2020-10-27 14:00:08,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:00:08,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:00:08,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808893700] [2020-10-27 14:00:08,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:00:08,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:00:08,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:00:08,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:00:08,737 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2020-10-27 14:00:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:00:08,850 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-27 14:00:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:00:08,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 14:00:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:00:08,854 INFO L225 Difference]: With dead ends: 68 [2020-10-27 14:00:08,854 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:00:08,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:00:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:00:08,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 14:00:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:00:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-27 14:00:08,866 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 26 [2020-10-27 14:00:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:00:08,867 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-27 14:00:08,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:00:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-27 14:00:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:00:08,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:00:08,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:00:08,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:00:08,869 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:00:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:00:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash -146239831, now seen corresponding path program 4 times [2020-10-27 14:00:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:00:08,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136433218] [2020-10-27 14:00:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:00:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:12,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:12,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:00:12,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:00:12,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3409 [2020-10-27 14:00:12,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:12,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:00:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:00:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:00:12,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:12,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:00:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:12,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:12,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:12,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:00:12,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:12,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:00:12,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:12,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:00:12,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:12,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:00:12,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:00:12,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136433218] [2020-10-27 14:00:12,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:00:12,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:00:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576926705] [2020-10-27 14:00:12,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:00:12,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:00:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:00:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:00:12,403 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 7 states. [2020-10-27 14:00:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:00:12,528 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-27 14:00:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:00:12,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-27 14:00:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:00:12,530 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:00:12,531 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:00:12,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:00:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:00:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 14:00:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:00:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-27 14:00:12,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 28 [2020-10-27 14:00:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:00:12,549 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-27 14:00:12,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:00:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-27 14:00:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:00:12,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:00:12,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:00:12,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:00:12,551 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:00:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:00:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash -338192437, now seen corresponding path program 5 times [2020-10-27 14:00:12,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:00:12,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245956312] [2020-10-27 14:00:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:00:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:12,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:17,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:17,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:00:17,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:00:17,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4779 [2020-10-27 14:00:17,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:00:17,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:00:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:00:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:18,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:00:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:18,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:18,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:00:18,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:18,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:00:18,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:18,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:00:18,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:18,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:00:18,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:00:18,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245956312] [2020-10-27 14:00:18,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:00:18,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:00:18,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117217680] [2020-10-27 14:00:18,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:00:18,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:00:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:00:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:00:18,119 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 14 states. [2020-10-27 14:00:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:00:18,817 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-27 14:00:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:00:18,821 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-27 14:00:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:00:18,822 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:00:18,822 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:00:18,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:00:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:00:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 14:00:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:00:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 14:00:18,842 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-10-27 14:00:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:00:18,842 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 14:00:18,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:00:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 14:00:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:00:18,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:00:18,844 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:00:18,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:00:18,844 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:00:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:00:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash -981871665, now seen corresponding path program 1 times [2020-10-27 14:00:18,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:00:18,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251580186] [2020-10-27 14:00:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:00:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:18,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:19,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:20,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:20,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:00:20,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:00:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-27 14:00:20,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:00:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:00:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:00:20,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:20,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:00:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:20,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:20,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:00:20,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:20,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:00:20,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:00:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:00:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:00:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:20,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:20,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:00:20,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:00:20,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:00:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:00:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:00:20,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251580186] [2020-10-27 14:00:20,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:00:20,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:00:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523220786] [2020-10-27 14:00:20,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:00:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:00:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:00:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:00:20,223 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2020-10-27 14:00:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:00:20,420 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-27 14:00:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:00:20,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 14:00:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:00:20,422 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:00:20,423 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:00:20,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:00:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:00:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-27 14:00:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:00:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 14:00:20,435 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-27 14:00:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:00:20,435 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 14:00:20,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:00:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 14:00:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:00:20,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:00:20,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:00:20,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:00:20,437 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:00:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:00:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash -350280911, now seen corresponding path program 2 times [2020-10-27 14:00:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:00:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101219613] [2020-10-27 14:00:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:00:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:20,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:20,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:24,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:24,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:00:24,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:00:24,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3669 [2020-10-27 14:00:24,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:00:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:00:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:00:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:25,951 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 29 [2020-10-27 14:00:26,659 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 44 [2020-10-27 14:00:27,744 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 235 DAG size of output: 55 [2020-10-27 14:00:29,527 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 267 DAG size of output: 74 [2020-10-27 14:00:31,110 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 300 DAG size of output: 94 [2020-10-27 14:00:33,491 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 296 DAG size of output: 82 [2020-10-27 14:00:35,142 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 265 DAG size of output: 75 [2020-10-27 14:00:37,083 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 345 DAG size of output: 86 [2020-10-27 14:00:40,793 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 522 DAG size of output: 154 [2020-10-27 14:00:44,418 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 379 DAG size of output: 112 [2020-10-27 14:00:46,899 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 332 DAG size of output: 99 [2020-10-27 14:00:48,953 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 322 DAG size of output: 70 [2020-10-27 14:00:49,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:00:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:49,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:49,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:49,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:00:49,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:49,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:00:49,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:00:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:00:49,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:49,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-27 14:00:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:00:49,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:00:49,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:00:49,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:00:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:00:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:00:49,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101219613] [2020-10-27 14:00:49,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:00:49,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:00:49,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463617637] [2020-10-27 14:00:49,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:00:49,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:00:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:00:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:00:49,785 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 23 states. [2020-10-27 14:00:50,730 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 115 [2020-10-27 14:00:51,335 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 109 [2020-10-27 14:00:52,072 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-10-27 14:00:52,807 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 101 [2020-10-27 14:00:53,254 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 14:00:54,175 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 84 [2020-10-27 14:00:55,326 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2020-10-27 14:00:57,026 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 189 DAG size of output: 123 [2020-10-27 14:00:57,471 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2020-10-27 14:00:58,254 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 14:00:58,823 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 14:00:59,136 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 14:00:59,449 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-27 14:00:59,824 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 14:01:00,115 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-27 14:01:00,906 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-27 14:01:01,690 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-27 14:01:01,960 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-27 14:01:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:01:02,124 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-27 14:01:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:01:02,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-10-27 14:01:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:01:02,126 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:01:02,126 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:01:02,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:01:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:01:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-27 14:01:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:01:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-27 14:01:02,148 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 38 [2020-10-27 14:01:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:01:02,149 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-27 14:01:02,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:01:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-27 14:01:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:01:02,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:01:02,151 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:01:02,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:01:02,151 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:01:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:01:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1018044947, now seen corresponding path program 3 times [2020-10-27 14:01:02,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:01:02,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156815781] [2020-10-27 14:01:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:01:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:02,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:02,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:07,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:07,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:01:07,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:01:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:01:07,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:01:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:01:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:01:07,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:07,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:01:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:07,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:07,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:07,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:01:07,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:07,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:01:07,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:07,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:01:07,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:07,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:07,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 14:01:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:07,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:01:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:07,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:01:07,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156815781] [2020-10-27 14:01:07,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:01:07,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:01:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038613404] [2020-10-27 14:01:07,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:01:07,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:01:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:01:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:01:07,300 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 9 states. [2020-10-27 14:01:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:01:07,631 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-10-27 14:01:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:01:07,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-27 14:01:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:01:07,634 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:01:07,634 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:01:07,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:01:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:01:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2020-10-27 14:01:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:01:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 14:01:07,648 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2020-10-27 14:01:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:01:07,648 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 14:01:07,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:01:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 14:01:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:01:07,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:01:07,649 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:01:07,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:01:07,650 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:01:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:01:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1520981527, now seen corresponding path program 4 times [2020-10-27 14:01:07,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:01:07,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655783778] [2020-10-27 14:01:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:01:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:12,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:12,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:01:12,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:01:12,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-27 14:01:12,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:12,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:01:12,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:01:12,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:01:12,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:12,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:01:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:12,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:12,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:01:12,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:12,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:01:12,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:01:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:12,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:12,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:01:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:12,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:12,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:01:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655783778] [2020-10-27 14:01:12,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:01:12,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:01:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093375443] [2020-10-27 14:01:12,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:01:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:01:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:01:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:01:12,941 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 9 states. [2020-10-27 14:01:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:01:13,110 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-10-27 14:01:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:01:13,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 14:01:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:01:13,112 INFO L225 Difference]: With dead ends: 80 [2020-10-27 14:01:13,113 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:01:13,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:01:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:01:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 14:01:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:01:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 14:01:13,126 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2020-10-27 14:01:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:01:13,126 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 14:01:13,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:01:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 14:01:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:01:13,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:01:13,127 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:01:13,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:01:13,128 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:01:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:01:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash 9755449, now seen corresponding path program 5 times [2020-10-27 14:01:13,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:01:13,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193334044] [2020-10-27 14:01:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:01:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:13,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:14,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:01:18,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:18,470 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2020-10-27 14:01:18,686 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2020-10-27 14:01:18,817 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-27 14:01:19,083 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-27 14:01:19,327 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-10-27 14:01:19,571 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2020-10-27 14:01:19,725 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2020-10-27 14:01:19,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:01:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:19,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:19,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:01:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:19,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:19,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 14:01:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:19,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:19,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:19,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:19,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:19,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:01:19,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:19,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:01:19,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:01:19,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:01:19,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 14:01:20,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193334044] [2020-10-27 14:01:20,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:01:20,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:01:20,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761269190] [2020-10-27 14:01:20,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:01:20,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:01:20,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:01:20,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:01:20,003 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2020-10-27 14:01:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:01:20,934 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-27 14:01:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:01:20,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-27 14:01:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:01:20,937 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:01:20,937 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:01:20,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:01:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:01:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-27 14:01:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:01:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 14:01:20,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 46 [2020-10-27 14:01:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:01:20,967 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 14:01:20,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:01:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 14:01:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:01:20,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:01:20,970 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:01:20,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:01:20,971 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:01:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:01:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1856956257, now seen corresponding path program 6 times [2020-10-27 14:01:20,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:01:20,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523411326] [2020-10-27 14:01:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:01:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:25,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:01:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:26,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:01:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:26,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:26,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:01:26,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:26,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:01:26,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:26,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:01:26,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:26,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 14:01:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:26,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:01:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:26,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:01:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:26,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:26,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:26,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:01:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523411326] [2020-10-27 14:01:26,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:01:26,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:01:26,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033354401] [2020-10-27 14:01:26,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:01:26,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:01:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:01:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:01:26,131 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 10 states. [2020-10-27 14:01:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:01:26,512 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-27 14:01:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:01:26,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 14:01:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:01:26,514 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:01:26,515 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:01:26,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:01:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:01:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-10-27 14:01:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:01:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 14:01:26,531 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2020-10-27 14:01:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:01:26,531 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 14:01:26,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:01:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 14:01:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:01:26,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:01:26,532 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:01:26,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:01:26,532 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:01:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:01:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 736113537, now seen corresponding path program 7 times [2020-10-27 14:01:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:01:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340162232] [2020-10-27 14:01:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:01:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:26,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:26,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:28,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:31,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:31,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:01:31,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:01:31,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-27 14:01:31,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:01:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:01:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:01:31,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:31,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:01:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:31,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:31,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:31,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:01:31,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:31,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:01:31,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:01:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:31,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:31,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 14:01:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:31,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:31,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:31,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:31,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:01:31,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:31,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:31,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:01:31,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:31,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:31,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:01:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:31,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:31,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:01:31,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:01:31,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:01:31,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:31,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:01:31,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:01:31,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:01:31,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:01:31,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340162232] [2020-10-27 14:01:31,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:01:31,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:01:31,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788257047] [2020-10-27 14:01:31,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:01:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:01:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:01:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:01:31,830 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 10 states. [2020-10-27 14:01:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:01:32,006 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-27 14:01:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:01:32,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-27 14:01:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:01:32,008 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:01:32,009 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:01:32,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:01:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:01:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 14:01:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:01:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 14:01:32,025 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2020-10-27 14:01:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:01:32,025 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 14:01:32,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:01:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 14:01:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:01:32,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:01:32,026 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:01:32,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:01:32,026 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:01:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:01:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 261363107, now seen corresponding path program 8 times [2020-10-27 14:01:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:01:32,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059557925] [2020-10-27 14:01:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:01:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:01:32,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:32,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:33,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:34,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:01:37,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:01:37,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:01:37,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:01:37,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5407 [2020-10-27 14:01:37,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:01:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:01:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:01:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:01:37,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:01:45,343 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2020-10-27 14:01:46,083 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 50 [2020-10-27 14:01:46,675 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 52 [2020-10-27 14:01:49,733 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 310 DAG size of output: 87 [2020-10-27 14:01:51,723 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 274 DAG size of output: 117 [2020-10-27 14:01:57,957 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 646 DAG size of output: 130 [2020-10-27 14:02:03,461 WARN L193 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 518 DAG size of output: 174 [2020-10-27 14:02:16,123 WARN L193 SmtUtils]: Spent 12.31 s on a formula simplification. DAG size of input: 835 DAG size of output: 184 [2020-10-27 14:02:24,598 WARN L193 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 587 DAG size of output: 151 [2020-10-27 14:02:38,152 WARN L193 SmtUtils]: Spent 13.29 s on a formula simplification. DAG size of input: 664 DAG size of output: 192 [2020-10-27 14:02:46,082 WARN L193 SmtUtils]: Spent 7.65 s on a formula simplification. DAG size of input: 504 DAG size of output: 163 [2020-10-27 14:02:53,393 WARN L193 SmtUtils]: Spent 7.08 s on a formula simplification. DAG size of input: 418 DAG size of output: 156 [2020-10-27 14:03:00,028 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 398 DAG size of output: 150 [2020-10-27 14:03:08,871 WARN L193 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 544 DAG size of output: 174 [2020-10-27 14:03:21,269 WARN L193 SmtUtils]: Spent 12.02 s on a formula simplification. DAG size of input: 606 DAG size of output: 322 [2020-10-27 14:03:38,384 WARN L193 SmtUtils]: Spent 16.71 s on a formula simplification. DAG size of input: 567 DAG size of output: 322