/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=SHALLOWEST --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/eca-rers2012/Problem03_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:51:57,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:51:57,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:51:57,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:51:57,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:51:57,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:51:57,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:51:57,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:51:57,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:51:57,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:51:57,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:51:57,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:51:57,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:51:57,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:51:57,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:51:57,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:51:57,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:51:57,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:51:57,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:51:57,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:51:57,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:51:57,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:51:57,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:51:57,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:51:57,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:51:57,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:51:57,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:51:57,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:51:57,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:51:57,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:51:57,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:51:57,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:51:57,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:51:57,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:51:57,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:51:57,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:51:57,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:51:57,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:51:57,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:51:57,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:51:57,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:51:57,554 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 [2020-10-26 20:51:57,599 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:51:57,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:51:57,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:51:57,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:51:57,603 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:51:57,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:51:57,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:51:57,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:51:57,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:51:57,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:51:57,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:51:57,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:51:57,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:51:57,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:51:57,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:51:57,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:51:57,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:51:57,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:51:57,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:51:57,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:51:57,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:51:57,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:51:57,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:51:57,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:51:57,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:51:57,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:51:57,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:51:57,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:51:57,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:51:57,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:51:58,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:51:58,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:51:58,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:51:58,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:51:58,053 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:51:58,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51.c [2020-10-26 20:51:58,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea6451239/4f66ddefb06e4ecebd8147f3e24759c2/FLAGa3bc32c0b [2020-10-26 20:51:59,165 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:51:59,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label51.c [2020-10-26 20:51:59,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea6451239/4f66ddefb06e4ecebd8147f3e24759c2/FLAGa3bc32c0b [2020-10-26 20:51:59,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea6451239/4f66ddefb06e4ecebd8147f3e24759c2 [2020-10-26 20:51:59,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:51:59,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:51:59,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:51:59,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:51:59,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:51:59,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:51:59" (1/1) ... [2020-10-26 20:51:59,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d899fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:59, skipping insertion in model container [2020-10-26 20:51:59,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:51:59" (1/1) ... [2020-10-26 20:51:59,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:51:59,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:52:00,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:52:00,095 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:52:00,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:52:00,379 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:52:00,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00 WrapperNode [2020-10-26 20:52:00,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:52:00,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:52:00,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:52:00,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:52:00,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (1/1) ... [2020-10-26 20:52:00,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:52:00,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:52:00,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:52:00,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:52:00,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (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 [2020-10-26 20:52:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:52:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:52:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:52:00,671 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:52:00,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:52:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:52:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:52:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:52:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:52:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:52:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:52:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:52:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:52:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:52:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:52:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:52:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:52:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:52:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:52:02,908 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:52:02,909 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:52:02,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:52:02 BoogieIcfgContainer [2020-10-26 20:52:02,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:52:02,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:52:02,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:52:02,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:52:02,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:51:59" (1/3) ... [2020-10-26 20:52:02,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530ef132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:52:02, skipping insertion in model container [2020-10-26 20:52:02,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:52:00" (2/3) ... [2020-10-26 20:52:02,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530ef132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:52:02, skipping insertion in model container [2020-10-26 20:52:02,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:52:02" (3/3) ... [2020-10-26 20:52:02,921 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label51.c [2020-10-26 20:52:02,934 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:52:02,940 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:52:02,954 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:52:02,985 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:52:02,986 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:52:02,986 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:52:02,986 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:52:02,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:52:02,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:52:02,986 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:52:02,986 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:52:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:52:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-26 20:52:03,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:03,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:03,032 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash 52827956, now seen corresponding path program 1 times [2020-10-26 20:52:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:03,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719734979] [2020-10-26 20:52:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:03,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:04,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:07,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:07,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 20:52:07,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:52:07,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4285 [2020-10-26 20:52:07,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:52:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:52:07,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:52:09,025 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-26 20:52:09,246 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-26 20:52:09,786 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:09,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:09,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:09,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:09,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:09,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:09,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:52:09,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:09,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:52:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719734979] [2020-10-26 20:52:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:52:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:52:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879221649] [2020-10-26 20:52:10,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:52:10,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:52:10,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:52:10,453 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:52:11,205 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 20:52:12,318 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 20:52:13,454 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 20:52:14,556 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 20:52:16,324 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 227 DAG size of output: 203 [2020-10-26 20:52:18,333 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 227 DAG size of output: 202 [2020-10-26 20:52:20,467 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 230 DAG size of output: 201 [2020-10-26 20:52:24,484 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 231 DAG size of output: 200 [2020-10-26 20:52:26,326 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 237 DAG size of output: 199 [2020-10-26 20:52:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:29,575 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:52:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:52:29,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 195 [2020-10-26 20:52:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:29,606 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:52:29,606 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:52:29,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:52:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:52:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:52:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:52:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:52:29,740 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 195 [2020-10-26 20:52:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:29,741 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:52:29,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:52:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:52:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:52:29,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:29,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:29,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:52:29,752 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1473553113, now seen corresponding path program 1 times [2020-10-26 20:52:29,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:29,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419758070] [2020-10-26 20:52:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:31,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:34,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:34,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-26 20:52:34,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:52:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4690 [2020-10-26 20:52:34,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:52:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-26 20:52:34,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:34,896 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:34,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:34,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:34,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:34,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:34,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:52:34,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:34,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:35,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:35,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:35,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:52:35,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:52:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:52:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419758070] [2020-10-26 20:52:35,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:35,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:52:35,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255201661] [2020-10-26 20:52:35,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:52:35,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:35,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:52:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:52:35,210 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:52:35,525 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:52:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:38,830 INFO L93 Difference]: Finished difference Result 850 states and 1330 transitions. [2020-10-26 20:52:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:52:38,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2020-10-26 20:52:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:38,839 INFO L225 Difference]: With dead ends: 850 [2020-10-26 20:52:38,839 INFO L226 Difference]: Without dead ends: 606 [2020-10-26 20:52:38,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-26 20:52:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 581. [2020-10-26 20:52:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-26 20:52:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 874 transitions. [2020-10-26 20:52:38,910 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 874 transitions. Word has length 206 [2020-10-26 20:52:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:38,912 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 874 transitions. [2020-10-26 20:52:38,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:52:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 874 transitions. [2020-10-26 20:52:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-26 20:52:38,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:38,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:38,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:52:38,917 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash -639821852, now seen corresponding path program 1 times [2020-10-26 20:52:38,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:38,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868659136] [2020-10-26 20:52:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:39,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:40,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:42,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:42,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-26 20:52:43,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:52:43,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4338 [2020-10-26 20:52:43,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:52:43,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:43,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-26 20:52:43,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:43,824 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:43,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:43,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:52:43,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:43,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:44,044 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:52:44,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:44,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:44,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:44,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:44,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:52:44,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:52:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:44,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:52:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:44,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:44,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:44,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:52:44,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:52:44,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 20:52:44,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:52:44,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 20:52:44,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868659136] [2020-10-26 20:52:44,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:44,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:52:44,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318573436] [2020-10-26 20:52:44,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:52:44,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:52:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:52:44,353 INFO L87 Difference]: Start difference. First operand 581 states and 874 transitions. Second operand 6 states. [2020-10-26 20:52:44,629 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:48,044 INFO L93 Difference]: Finished difference Result 1505 states and 2392 transitions. [2020-10-26 20:52:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:52:48,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2020-10-26 20:52:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:48,052 INFO L225 Difference]: With dead ends: 1505 [2020-10-26 20:52:48,053 INFO L226 Difference]: Without dead ends: 1045 [2020-10-26 20:52:48,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-10-26 20:52:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1033. [2020-10-26 20:52:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2020-10-26 20:52:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1512 transitions. [2020-10-26 20:52:48,116 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1512 transitions. Word has length 216 [2020-10-26 20:52:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:48,116 INFO L481 AbstractCegarLoop]: Abstraction has 1033 states and 1512 transitions. [2020-10-26 20:52:48,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:52:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1512 transitions. [2020-10-26 20:52:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 20:52:48,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:48,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:48,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:52:48,122 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1516375992, now seen corresponding path program 1 times [2020-10-26 20:52:48,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:48,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038834203] [2020-10-26 20:52:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:48,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:50,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:50,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2266 [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:52:50,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:50,813 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:50,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:50,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:50,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:50,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:50,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:50,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:52:50,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:50,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:50,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:50,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:50,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:50,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:50,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:50,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:50,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:52:50,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:50,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:52:50,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:50,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:50,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:50,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:52:50,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:50,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:52:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:50,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:51,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:51,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:52:51,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:52:51,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:52:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:52:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038834203] [2020-10-26 20:52:51,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:51,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:52:51,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295872959] [2020-10-26 20:52:51,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:52:51,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:51,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:52:51,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:52:51,134 INFO L87 Difference]: Start difference. First operand 1033 states and 1512 transitions. Second operand 7 states. [2020-10-26 20:52:51,577 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:52,424 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:55,943 INFO L93 Difference]: Finished difference Result 2936 states and 4911 transitions. [2020-10-26 20:52:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:52:55,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 226 [2020-10-26 20:52:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:55,969 INFO L225 Difference]: With dead ends: 2936 [2020-10-26 20:52:55,969 INFO L226 Difference]: Without dead ends: 2024 [2020-10-26 20:52:55,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:52:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2020-10-26 20:52:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1918. [2020-10-26 20:52:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-26 20:52:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2607 transitions. [2020-10-26 20:52:56,116 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2607 transitions. Word has length 226 [2020-10-26 20:52:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:56,116 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2607 transitions. [2020-10-26 20:52:56,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:52:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2607 transitions. [2020-10-26 20:52:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-26 20:52:56,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:56,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:56,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:52:56,130 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1607862419, now seen corresponding path program 1 times [2020-10-26 20:52:56,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:56,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285196084] [2020-10-26 20:52:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:56,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:56,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:57,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:00,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:01,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 20:53:01,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:53:01,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 20:53:01,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:53:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-26 20:53:01,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:01,707 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:01,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:01,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:01,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:01,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:53:01,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:01,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:01,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:01,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:01,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:53:01,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:01,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:01,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:01,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:01,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:01,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:02,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:02,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:53:02,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:02,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 20:53:02,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:02,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:02,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:53:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:53:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 20:53:02,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285196084] [2020-10-26 20:53:02,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:02,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:53:02,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544724614] [2020-10-26 20:53:02,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:02,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:02,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:02,182 INFO L87 Difference]: Start difference. First operand 1918 states and 2607 transitions. Second operand 7 states. [2020-10-26 20:53:02,456 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:04,125 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:06,592 INFO L93 Difference]: Finished difference Result 5373 states and 7758 transitions. [2020-10-26 20:53:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:53:06,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-10-26 20:53:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:06,625 INFO L225 Difference]: With dead ends: 5373 [2020-10-26 20:53:06,625 INFO L226 Difference]: Without dead ends: 3576 [2020-10-26 20:53:06,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2020-10-26 20:53:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3286. [2020-10-26 20:53:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3286 states. [2020-10-26 20:53:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4659 transitions. [2020-10-26 20:53:06,777 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4659 transitions. Word has length 236 [2020-10-26 20:53:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:06,777 INFO L481 AbstractCegarLoop]: Abstraction has 3286 states and 4659 transitions. [2020-10-26 20:53:06,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4659 transitions. [2020-10-26 20:53:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 20:53:06,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:06,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:06,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:53:06,792 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1943236316, now seen corresponding path program 1 times [2020-10-26 20:53:06,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998470337] [2020-10-26 20:53:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:07,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:08,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:11,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:11,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 20:53:11,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:53:11,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4465 [2020-10-26 20:53:11,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 20:53:11,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:11,584 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:11,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:11,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:11,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:11,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:11,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:11,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:53:11,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:11,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:11,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:11,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:11,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:11,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:11,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:53:11,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:11,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:11,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:11,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:11,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:11,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:11,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 20:53:11,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:11,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 20:53:11,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:11,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:11,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:11,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 20:53:11,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:53:11,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998470337] [2020-10-26 20:53:11,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:11,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:11,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329148959] [2020-10-26 20:53:11,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:11,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:11,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:11,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:11,940 INFO L87 Difference]: Start difference. First operand 3286 states and 4659 transitions. Second operand 8 states. [2020-10-26 20:53:12,216 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:12,935 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:16,197 INFO L93 Difference]: Finished difference Result 8391 states and 12427 transitions. [2020-10-26 20:53:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:53:16,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-10-26 20:53:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:16,240 INFO L225 Difference]: With dead ends: 8391 [2020-10-26 20:53:16,241 INFO L226 Difference]: Without dead ends: 5226 [2020-10-26 20:53:16,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:53:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2020-10-26 20:53:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5098. [2020-10-26 20:53:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5098 states. [2020-10-26 20:53:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 7008 transitions. [2020-10-26 20:53:16,461 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 7008 transitions. Word has length 237 [2020-10-26 20:53:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:16,462 INFO L481 AbstractCegarLoop]: Abstraction has 5098 states and 7008 transitions. [2020-10-26 20:53:16,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 7008 transitions. [2020-10-26 20:53:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 20:53:16,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:16,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:16,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:53:16,483 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2136996632, now seen corresponding path program 1 times [2020-10-26 20:53:16,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065415434] [2020-10-26 20:53:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:20,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:21,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:21,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-26 20:53:21,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:53:21,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 20:53:21,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:21,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:21,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:21,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:53:21,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:21,837 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:21,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:21,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:21,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:21,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:53:21,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:21,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:21,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:21,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:21,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:21,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:21,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:22,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:22,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:22,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:53:22,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:22,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 20:53:22,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:22,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:22,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:22,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:53:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:22,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:53:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:22,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:22,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:53:22,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:22,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 20:53:22,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:22,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:53:22,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:22,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 20:53:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:22,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:22,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:22,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:22,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:53:22,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:22,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:53:22,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:22,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:53:22,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065415434] [2020-10-26 20:53:22,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:22,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:53:22,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154428799] [2020-10-26 20:53:22,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:22,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:22,380 INFO L87 Difference]: Start difference. First operand 5098 states and 7008 transitions. Second operand 8 states. [2020-10-26 20:53:22,648 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:24,829 INFO L93 Difference]: Finished difference Result 10027 states and 13901 transitions. [2020-10-26 20:53:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:53:24,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 250 [2020-10-26 20:53:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:24,857 INFO L225 Difference]: With dead ends: 10027 [2020-10-26 20:53:24,858 INFO L226 Difference]: Without dead ends: 5050 [2020-10-26 20:53:24,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:53:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2020-10-26 20:53:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 5008. [2020-10-26 20:53:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5008 states. [2020-10-26 20:53:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 6705 transitions. [2020-10-26 20:53:25,036 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 6705 transitions. Word has length 250 [2020-10-26 20:53:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:25,037 INFO L481 AbstractCegarLoop]: Abstraction has 5008 states and 6705 transitions. [2020-10-26 20:53:25,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 6705 transitions. [2020-10-26 20:53:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:53:25,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:25,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:25,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:53:25,056 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2027771275, now seen corresponding path program 1 times [2020-10-26 20:53:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:25,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28884816] [2020-10-26 20:53:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:25,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:25,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:30,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 20:53:30,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:30,507 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:30,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:30,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:30,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:30,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:30,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:30,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:53:30,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:30,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:30,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:30,659 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:30,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:30,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:30,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:30,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:53:30,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:53:30,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:31,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:31,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:53:31,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:31,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 20:53:31,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:31,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:53:31,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:31,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 20:53:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:31,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:31,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:31,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 60 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:53:31,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28884816] [2020-10-26 20:53:31,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:31,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:53:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600927568] [2020-10-26 20:53:31,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:31,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:31,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:31,208 INFO L87 Difference]: Start difference. First operand 5008 states and 6705 transitions. Second operand 8 states. [2020-10-26 20:53:31,502 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:53:32,607 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:53:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:37,465 INFO L93 Difference]: Finished difference Result 15029 states and 21668 transitions. [2020-10-26 20:53:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:53:37,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 261 [2020-10-26 20:53:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:37,535 INFO L225 Difference]: With dead ends: 15029 [2020-10-26 20:53:37,535 INFO L226 Difference]: Without dead ends: 10142 [2020-10-26 20:53:37,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:53:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2020-10-26 20:53:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 9961. [2020-10-26 20:53:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9961 states. [2020-10-26 20:53:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9961 states to 9961 states and 13664 transitions. [2020-10-26 20:53:38,048 INFO L78 Accepts]: Start accepts. Automaton has 9961 states and 13664 transitions. Word has length 261 [2020-10-26 20:53:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:38,048 INFO L481 AbstractCegarLoop]: Abstraction has 9961 states and 13664 transitions. [2020-10-26 20:53:38,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9961 states and 13664 transitions. [2020-10-26 20:53:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-26 20:53:38,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:38,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:38,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:53:38,073 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -37463263, now seen corresponding path program 1 times [2020-10-26 20:53:38,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:38,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063658409] [2020-10-26 20:53:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:38,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:38,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:38,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:40,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:43,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:53:43,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:43,490 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:43,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:43,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:43,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:43,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:43,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:53:43,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:43,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:43,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:43,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:43,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:43,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:43,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:43,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:43,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:43,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:53:43,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:43,835 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-10-26 20:53:43,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:53:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:43,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:53:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:43,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 20:53:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:44,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:53:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:44,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 70 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 20:53:44,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063658409] [2020-10-26 20:53:44,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:44,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:44,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628388920] [2020-10-26 20:53:44,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:44,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:44,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:44,148 INFO L87 Difference]: Start difference. First operand 9961 states and 13664 transitions. Second operand 7 states. [2020-10-26 20:53:44,411 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:45,933 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:53:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:48,151 INFO L93 Difference]: Finished difference Result 27286 states and 38951 transitions. [2020-10-26 20:53:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:53:48,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 271 [2020-10-26 20:53:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:48,245 INFO L225 Difference]: With dead ends: 27286 [2020-10-26 20:53:48,245 INFO L226 Difference]: Without dead ends: 18286 [2020-10-26 20:53:48,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:53:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18286 states. [2020-10-26 20:53:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18286 to 17292. [2020-10-26 20:53:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17292 states. [2020-10-26 20:53:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17292 states to 17292 states and 24293 transitions. [2020-10-26 20:53:48,890 INFO L78 Accepts]: Start accepts. Automaton has 17292 states and 24293 transitions. Word has length 271 [2020-10-26 20:53:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:48,891 INFO L481 AbstractCegarLoop]: Abstraction has 17292 states and 24293 transitions. [2020-10-26 20:53:48,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 17292 states and 24293 transitions. [2020-10-26 20:53:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 20:53:48,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:48,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:48,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:53:48,934 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:48,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1649135022, now seen corresponding path program 1 times [2020-10-26 20:53:48,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:48,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516004427] [2020-10-26 20:53:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4007 [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:53,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 20:53:53,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:53,291 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:53,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:53,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:53,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:53,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:53,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:53,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:53,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:53,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:53,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:53,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 20:53:53,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 20:53:53,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:53,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 20:53:53,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:53:54,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516004427] [2020-10-26 20:53:54,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:54,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279771508] [2020-10-26 20:53:54,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:54,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:54,111 INFO L87 Difference]: Start difference. First operand 17292 states and 24293 transitions. Second operand 8 states. [2020-10-26 20:53:54,400 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:56,641 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 20:53:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:58,782 INFO L93 Difference]: Finished difference Result 37133 states and 53411 transitions. [2020-10-26 20:53:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:53:58,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 273 [2020-10-26 20:53:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:58,875 INFO L225 Difference]: With dead ends: 37133 [2020-10-26 20:53:58,875 INFO L226 Difference]: Without dead ends: 20171 [2020-10-26 20:53:58,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:53:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20171 states. [2020-10-26 20:53:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20171 to 19844. [2020-10-26 20:53:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19844 states. [2020-10-26 20:53:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19844 states to 19844 states and 28111 transitions. [2020-10-26 20:53:59,550 INFO L78 Accepts]: Start accepts. Automaton has 19844 states and 28111 transitions. Word has length 273 [2020-10-26 20:53:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:59,550 INFO L481 AbstractCegarLoop]: Abstraction has 19844 states and 28111 transitions. [2020-10-26 20:53:59,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 19844 states and 28111 transitions. [2020-10-26 20:53:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-26 20:53:59,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:59,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:53:59,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:53:59,597 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:59,598 INFO L82 PathProgramCache]: Analyzing trace with hash -853047270, now seen corresponding path program 1 times [2020-10-26 20:53:59,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:59,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306784347] [2020-10-26 20:53:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:59,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:00,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:01,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 20:54:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:02,170 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:02,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:02,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:02,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:02,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:02,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:02,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:02,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 20:54:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:02,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:54:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:02,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:54:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 20:54:02,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:54:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:54:02,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306784347] [2020-10-26 20:54:02,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:02,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:02,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177793610] [2020-10-26 20:54:02,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:02,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:02,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:02,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:02,725 INFO L87 Difference]: Start difference. First operand 19844 states and 28111 transitions. Second operand 7 states. [2020-10-26 20:54:03,079 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:54:05,293 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:54:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:06,811 INFO L93 Difference]: Finished difference Result 44292 states and 67376 transitions. [2020-10-26 20:54:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:54:06,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-26 20:54:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:06,940 INFO L225 Difference]: With dead ends: 44292 [2020-10-26 20:54:06,940 INFO L226 Difference]: Without dead ends: 24569 [2020-10-26 20:54:06,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:54:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24569 states. [2020-10-26 20:54:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24569 to 24099. [2020-10-26 20:54:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24099 states. [2020-10-26 20:54:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24099 states to 24099 states and 34149 transitions. [2020-10-26 20:54:07,677 INFO L78 Accepts]: Start accepts. Automaton has 24099 states and 34149 transitions. Word has length 284 [2020-10-26 20:54:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:07,677 INFO L481 AbstractCegarLoop]: Abstraction has 24099 states and 34149 transitions. [2020-10-26 20:54:07,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24099 states and 34149 transitions. [2020-10-26 20:54:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-26 20:54:07,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:07,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:07,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:54:07,729 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1917209627, now seen corresponding path program 1 times [2020-10-26 20:54:07,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:07,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096989568] [2020-10-26 20:54:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:07,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:08,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:54:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:12,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:54:12,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,099 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:13,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:13,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:13,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:13,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:13,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:54:13,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:13,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:13,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:13,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:13,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:13,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:54:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:54:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:54:13,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:54:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:13,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:54:13,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:54:13,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:13,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:13,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:54:13,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-26 20:54:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:13,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:13,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:13,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:13,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:54:13,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:13,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:13,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:54:13,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:13,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 93 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 20:54:13,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096989568] [2020-10-26 20:54:13,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:13,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:13,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822342498] [2020-10-26 20:54:13,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:13,542 INFO L87 Difference]: Start difference. First operand 24099 states and 34149 transitions. Second operand 7 states. [2020-10-26 20:54:13,798 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:54:15,603 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:54:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:17,238 INFO L93 Difference]: Finished difference Result 54096 states and 77193 transitions. [2020-10-26 20:54:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:54:17,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 293 [2020-10-26 20:54:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:17,371 INFO L225 Difference]: With dead ends: 54096 [2020-10-26 20:54:17,372 INFO L226 Difference]: Without dead ends: 30750 [2020-10-26 20:54:17,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:54:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2020-10-26 20:54:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 30484. [2020-10-26 20:54:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30484 states. [2020-10-26 20:54:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30484 states to 30484 states and 42806 transitions. [2020-10-26 20:54:18,216 INFO L78 Accepts]: Start accepts. Automaton has 30484 states and 42806 transitions. Word has length 293 [2020-10-26 20:54:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:18,216 INFO L481 AbstractCegarLoop]: Abstraction has 30484 states and 42806 transitions. [2020-10-26 20:54:18,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30484 states and 42806 transitions. [2020-10-26 20:54:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-26 20:54:18,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:18,257 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:18,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:54:18,258 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -153198248, now seen corresponding path program 1 times [2020-10-26 20:54:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:18,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356637719] [2020-10-26 20:54:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:18,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:18,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:18,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:23,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:23,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-26 20:54:23,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:54:23,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-26 20:54:23,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:54:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:54:23,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:23,707 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:23,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:23,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:54:23,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:23,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:23,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:54:23,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:23,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:54:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:23,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:24,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:54:24,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:24,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:54:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:24,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:24,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:54:24,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:24,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:54:24,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:54:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:24,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 20:54:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:24,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:24,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:24,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:24,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:24,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:54:24,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:54:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 100 proven. 47 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 20:54:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356637719] [2020-10-26 20:54:24,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:24,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:54:24,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768575407] [2020-10-26 20:54:24,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:54:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:54:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:54:24,269 INFO L87 Difference]: Start difference. First operand 30484 states and 42806 transitions. Second operand 10 states. [2020-10-26 20:54:24,539 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:54:25,188 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 162 [2020-10-26 20:54:25,911 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 162 [2020-10-26 20:54:28,349 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 161 [2020-10-26 20:54:30,799 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:54:31,639 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 159 [2020-10-26 20:54:33,154 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:54:36,658 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:54:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:38,069 INFO L93 Difference]: Finished difference Result 118165 states and 171101 transitions. [2020-10-26 20:54:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 20:54:38,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 296 [2020-10-26 20:54:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:38,472 INFO L225 Difference]: With dead ends: 118165 [2020-10-26 20:54:38,472 INFO L226 Difference]: Without dead ends: 88434 [2020-10-26 20:54:38,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 20:54:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88434 states. [2020-10-26 20:54:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88434 to 87057. [2020-10-26 20:54:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87057 states. [2020-10-26 20:54:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87057 states to 87057 states and 125265 transitions. [2020-10-26 20:54:42,258 INFO L78 Accepts]: Start accepts. Automaton has 87057 states and 125265 transitions. Word has length 296 [2020-10-26 20:54:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:42,259 INFO L481 AbstractCegarLoop]: Abstraction has 87057 states and 125265 transitions. [2020-10-26 20:54:42,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:54:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87057 states and 125265 transitions. [2020-10-26 20:54:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-26 20:54:42,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:42,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:54:42,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:54:42,531 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1083895977, now seen corresponding path program 1 times [2020-10-26 20:54:42,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:42,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937575519] [2020-10-26 20:54:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:42,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:45,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:54:47,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-10-26 20:54:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:48,517 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 20:54:48,857 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-26 20:54:49,195 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-26 20:54:49,617 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 87 [2020-10-26 20:54:50,021 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 82 [2020-10-26 20:54:50,407 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 76 [2020-10-26 20:54:50,727 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 64 [2020-10-26 20:54:50,998 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-10-26 20:54:51,270 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:51,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:51,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:51,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:51,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:51,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:51,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:54:51,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:51,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:51,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:51,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:51,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:51,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:51,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:54:51,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 20:54:51,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:54:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:54:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:52,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:52,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:54:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:54:53,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937575519] [2020-10-26 20:54:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:54:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89029134] [2020-10-26 20:54:53,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:54:53,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:54:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:54:53,191 INFO L87 Difference]: Start difference. First operand 87057 states and 125265 transitions. Second operand 19 states. [2020-10-26 20:54:53,636 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-26 20:54:56,533 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-26 20:54:57,176 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-26 20:54:57,747 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-26 20:54:58,220 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-26 20:54:58,796 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-10-26 20:55:00,086 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 227 DAG size of output: 206 [2020-10-26 20:55:01,504 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 238 DAG size of output: 214 [2020-10-26 20:55:01,981 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-26 20:55:03,389 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 244 DAG size of output: 212 [2020-10-26 20:55:05,773 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 244 DAG size of output: 211 [2020-10-26 20:55:06,007 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 20:55:10,361 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 245 DAG size of output: 210 [2020-10-26 20:55:11,134 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 20:55:14,127 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 248 DAG size of output: 209 [2020-10-26 20:55:16,209 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 248 DAG size of output: 207 [2020-10-26 20:55:22,674 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-26 20:55:23,830 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 223 DAG size of output: 205 [2020-10-26 20:55:25,251 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 234 DAG size of output: 213