/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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:54:41,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:54:41,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:54:41,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:54:41,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:54:41,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:54:41,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:54:41,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:54:41,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:54:41,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:54:41,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:54:41,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:54:41,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:54:41,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:54:41,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:54:41,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:54:41,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:54:41,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:54:41,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:54:41,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:54:41,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:54:41,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:54:41,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:54:41,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:54:41,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:54:41,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:54:41,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:54:41,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:54:41,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:54:41,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:54:41,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:54:41,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:54:41,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:54:41,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:54:41,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:54:41,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:54:41,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:54:41,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:54:41,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:54:41,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:54:41,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:54:41,545 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 20:54:41,580 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:54:41,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:54:41,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:54:41,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:54:41,584 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:54:41,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:54:41,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:54:41,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:54:41,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:54:41,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:54:41,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:54:41,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:54:41,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:54:41,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:54:41,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:54:41,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:54:41,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:54:41,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:54:41,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:54:41,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:54:41,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:54:41,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:54:41,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:54:41,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:54:41,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:54:41,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:54:41,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:54:41,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:54:41,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:54:41,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:54:42,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:54:42,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:54:42,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:54:42,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:54:42,060 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:54:42,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2020-10-26 20:54:42,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b89fb8c/91d5c1ced62f4718bbec1dfc44c2f7a6/FLAG50c568b37 [2020-10-26 20:54:42,946 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:54:42,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2020-10-26 20:54:42,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b89fb8c/91d5c1ced62f4718bbec1dfc44c2f7a6/FLAG50c568b37 [2020-10-26 20:54:43,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b89fb8c/91d5c1ced62f4718bbec1dfc44c2f7a6 [2020-10-26 20:54:43,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:54:43,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:54:43,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:54:43,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:54:43,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:54:43,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:54:43" (1/1) ... [2020-10-26 20:54:43,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a921aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:43, skipping insertion in model container [2020-10-26 20:54:43,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:54:43" (1/1) ... [2020-10-26 20:54:43,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:54:43,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:54:44,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:54:44,017 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:54:44,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:54:44,447 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:54:44,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44 WrapperNode [2020-10-26 20:54:44,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:54:44,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:54:44,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:54:44,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:54:44,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (1/1) ... [2020-10-26 20:54:44,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:54:44,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:54:44,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:54:44,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:54:44,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (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 20:54:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:54:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:54:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:54:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:54:44,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:54:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:54:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:54:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:54:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:54:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:54:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:54:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:54:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:54:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:54:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:54:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:54:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:54:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:54:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:54:47,835 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:54:47,835 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:54:47,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:54:47 BoogieIcfgContainer [2020-10-26 20:54:47,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:54:47,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:54:47,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:54:47,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:54:47,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:54:43" (1/3) ... [2020-10-26 20:54:47,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c9b826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:54:47, skipping insertion in model container [2020-10-26 20:54:47,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44" (2/3) ... [2020-10-26 20:54:47,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c9b826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:54:47, skipping insertion in model container [2020-10-26 20:54:47,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:54:47" (3/3) ... [2020-10-26 20:54:47,853 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label56.c [2020-10-26 20:54:47,867 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:54:47,878 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:54:47,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:54:47,933 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:54:47,934 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:54:47,934 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:54:47,934 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:54:47,934 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:54:47,934 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:54:47,934 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:54:47,934 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:54:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:54:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-26 20:54:47,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:47,977 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] [2020-10-26 20:54:47,978 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash -709890784, now seen corresponding path program 1 times [2020-10-26 20:54:47,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:47,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199988108] [2020-10-26 20:54:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:49,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:53,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:53,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-26 20:54:53,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:54:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4819 [2020-10-26 20:54:53,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:54:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:54:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:54:54,285 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-26 20:54:54,452 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 20:54:54,782 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-26 20:54:55,239 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-26 20:54:55,631 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-26 20:54:55,873 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-26 20:54:56,098 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-26 20:54:56,300 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-26 20:54:56,693 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:56,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:56,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:56,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:56,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:54:56,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:57,407 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 20:54:57,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199988108] [2020-10-26 20:54:57,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:54:57,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:54:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862491128] [2020-10-26 20:54:57,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:54:57,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:54:57,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:54:57,434 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:54:58,002 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:54:58,959 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 196 [2020-10-26 20:54:59,950 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:55:01,050 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 221 DAG size of output: 216 [2020-10-26 20:55:02,900 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 234 DAG size of output: 213 [2020-10-26 20:55:04,963 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 234 DAG size of output: 210 [2020-10-26 20:55:07,214 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 237 DAG size of output: 207 [2020-10-26 20:55:11,264 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 238 DAG size of output: 204 [2020-10-26 20:55:13,031 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 240 DAG size of output: 200 [2020-10-26 20:55:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:16,210 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:55:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:55:16,213 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 180 [2020-10-26 20:55:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:16,229 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:55:16,229 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:55:16,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:55:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:55:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:55:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:55:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:55:16,330 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 180 [2020-10-26 20:55:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:16,334 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:55:16,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:55:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:55:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 20:55:16,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:16,345 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] [2020-10-26 20:55:16,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:55:16,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash 723771277, now seen corresponding path program 1 times [2020-10-26 20:55:16,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:16,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807931982] [2020-10-26 20:55:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:16,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:16,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:21,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:21,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 20:55:21,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:55:21,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4720 [2020-10-26 20:55:21,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:21,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:55:21,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:21,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-26 20:55:21,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:21,554 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:21,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:21,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:21,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:55:21,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:55:21,736 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:55:21,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:21,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:21,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:21,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:21,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:55:21,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:21,922 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 20:55:21,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807931982] [2020-10-26 20:55:21,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:21,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:55:21,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065710856] [2020-10-26 20:55:21,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:55:21,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:21,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:55:21,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:55:21,927 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:55:22,187 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:55:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:25,495 INFO L93 Difference]: Finished difference Result 846 states and 1318 transitions. [2020-10-26 20:55:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:55:25,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2020-10-26 20:55:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:25,503 INFO L225 Difference]: With dead ends: 846 [2020-10-26 20:55:25,504 INFO L226 Difference]: Without dead ends: 602 [2020-10-26 20:55:25,506 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 20:55:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-26 20:55:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 587. [2020-10-26 20:55:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-26 20:55:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 848 transitions. [2020-10-26 20:55:25,573 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 848 transitions. Word has length 191 [2020-10-26 20:55:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:25,574 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 848 transitions. [2020-10-26 20:55:25,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:55:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 848 transitions. [2020-10-26 20:55:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-26 20:55:25,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:25,579 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-26 20:55:25,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:55:25,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1864908345, now seen corresponding path program 1 times [2020-10-26 20:55:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:25,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450643160] [2020-10-26 20:55:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:25,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:25,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:29,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:29,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 20:55:29,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:55:29,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4222 [2020-10-26 20:55:29,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:55:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:55:29,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:30,108 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:30,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:30,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:30,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:30,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:30,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:55:30,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:30,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:30,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:30,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:30,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:30,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:30,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:55:30,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:30,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:30,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:30,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:55:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:30,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:30,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:30,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:55:30,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:55:30,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:30,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:55:30,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:55:30,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450643160] [2020-10-26 20:55:30,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:30,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:55:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925312348] [2020-10-26 20:55:30,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:55:30,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:55:30,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:55:30,442 INFO L87 Difference]: Start difference. First operand 587 states and 848 transitions. Second operand 8 states. [2020-10-26 20:55:30,704 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:55:31,246 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:34,982 INFO L93 Difference]: Finished difference Result 1542 states and 2348 transitions. [2020-10-26 20:55:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:55:34,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 201 [2020-10-26 20:55:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:34,991 INFO L225 Difference]: With dead ends: 1542 [2020-10-26 20:55:34,991 INFO L226 Difference]: Without dead ends: 1076 [2020-10-26 20:55:34,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:55:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2020-10-26 20:55:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1047. [2020-10-26 20:55:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2020-10-26 20:55:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1551 transitions. [2020-10-26 20:55:35,047 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1551 transitions. Word has length 201 [2020-10-26 20:55:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:35,048 INFO L481 AbstractCegarLoop]: Abstraction has 1047 states and 1551 transitions. [2020-10-26 20:55:35,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:55:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1551 transitions. [2020-10-26 20:55:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 20:55:35,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:35,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:55:35,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:55:35,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2092296040, now seen corresponding path program 1 times [2020-10-26 20:55:35,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:35,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480190874] [2020-10-26 20:55:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:35,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:39,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:39,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 20:55:39,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:55:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4132 [2020-10-26 20:55:39,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:39,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:55:39,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:39,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:55:39,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:39,571 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:39,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:39,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:39,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:39,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:39,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:55:39,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:39,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:39,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:39,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:39,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:39,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:55:39,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:39,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:39,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:55:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:39,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:39,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:55:39,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:39,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:55:39,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:55:39,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:55:40,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480190874] [2020-10-26 20:55:40,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:40,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:55:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927003353] [2020-10-26 20:55:40,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:55:40,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:40,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:55:40,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:55:40,010 INFO L87 Difference]: Start difference. First operand 1047 states and 1551 transitions. Second operand 8 states. [2020-10-26 20:55:40,309 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:55:40,766 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:55:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:45,896 INFO L93 Difference]: Finished difference Result 3775 states and 6114 transitions. [2020-10-26 20:55:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:55:45,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 205 [2020-10-26 20:55:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:45,922 INFO L225 Difference]: With dead ends: 3775 [2020-10-26 20:55:45,922 INFO L226 Difference]: Without dead ends: 2849 [2020-10-26 20:55:45,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:55:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2020-10-26 20:55:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2787. [2020-10-26 20:55:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-10-26 20:55:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 3996 transitions. [2020-10-26 20:55:46,084 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 3996 transitions. Word has length 205 [2020-10-26 20:55:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:46,084 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 3996 transitions. [2020-10-26 20:55:46,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:55:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 3996 transitions. [2020-10-26 20:55:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 20:55:46,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:46,093 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:55:46,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:55:46,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1235056396, now seen corresponding path program 1 times [2020-10-26 20:55:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:46,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695407363] [2020-10-26 20:55:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:50,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:50,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-26 20:55:50,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:55:50,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4249 [2020-10-26 20:55:50,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:55:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:50,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:55:50,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:55:50,707 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:50,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:50,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:50,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:50,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:50,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:55:50,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:50,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:50,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:50,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:50,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:50,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:50,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:50,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:55:50,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:55:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:51,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:51,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:55:51,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:51,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 20:55:51,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:55:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:55:51,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695407363] [2020-10-26 20:55:51,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:51,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:55:51,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453065530] [2020-10-26 20:55:51,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:55:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:55:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:55:51,107 INFO L87 Difference]: Start difference. First operand 2787 states and 3996 transitions. Second operand 7 states. [2020-10-26 20:55:51,354 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:53,324 INFO L93 Difference]: Finished difference Result 5000 states and 7378 transitions. [2020-10-26 20:55:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:55:53,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 208 [2020-10-26 20:55:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:53,342 INFO L225 Difference]: With dead ends: 5000 [2020-10-26 20:55:53,342 INFO L226 Difference]: Without dead ends: 2543 [2020-10-26 20:55:53,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:55:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2020-10-26 20:55:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2531. [2020-10-26 20:55:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2531 states. [2020-10-26 20:55:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3548 transitions. [2020-10-26 20:55:53,437 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3548 transitions. Word has length 208 [2020-10-26 20:55:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:53,438 INFO L481 AbstractCegarLoop]: Abstraction has 2531 states and 3548 transitions. [2020-10-26 20:55:53,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3548 transitions. [2020-10-26 20:55:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-26 20:55:53,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:53,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:53,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:55:53,445 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:53,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2115311845, now seen corresponding path program 1 times [2020-10-26 20:55:53,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:53,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618326039] [2020-10-26 20:55:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:53,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:53,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:54,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:55,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:55,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-26 20:55:55,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:55:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2321 [2020-10-26 20:55:55,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:55:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:56,073 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:56,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:56,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:56,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:56,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:56,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:56,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:55:56,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:56,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:56,290 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:55:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:56,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:56,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:56,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:55:56,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 20:55:56,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:56,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:55:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:56,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:55:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:56,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:56,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:55:56,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:55:56,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:55:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:56,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:55:56,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618326039] [2020-10-26 20:55:56,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:56,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 20:55:56,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338518738] [2020-10-26 20:55:56,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:55:56,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:55:56,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:55:56,481 INFO L87 Difference]: Start difference. First operand 2531 states and 3548 transitions. Second operand 5 states. [2020-10-26 20:55:56,753 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:58,582 INFO L93 Difference]: Finished difference Result 4317 states and 6191 transitions. [2020-10-26 20:55:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:55:58,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-10-26 20:55:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:58,600 INFO L225 Difference]: With dead ends: 4317 [2020-10-26 20:55:58,600 INFO L226 Difference]: Without dead ends: 2542 [2020-10-26 20:55:58,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:55:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2020-10-26 20:55:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2530. [2020-10-26 20:55:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2530 states. [2020-10-26 20:55:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3546 transitions. [2020-10-26 20:55:58,705 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3546 transitions. Word has length 211 [2020-10-26 20:55:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:58,705 INFO L481 AbstractCegarLoop]: Abstraction has 2530 states and 3546 transitions. [2020-10-26 20:55:58,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:55:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3546 transitions. [2020-10-26 20:55:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-26 20:55:58,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:58,713 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-10-26 20:55:58,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:55:58,714 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:58,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1058901012, now seen corresponding path program 1 times [2020-10-26 20:55:58,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:58,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960833263] [2020-10-26 20:55:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:58,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:59,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:00,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:00,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:01,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:01,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:56:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:01,898 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:01,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:01,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:01,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:01,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:56:01,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:01,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:02,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:02,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:02,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:02,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:02,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:56:02,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:02,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:02,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:02,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:02,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:56:02,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:02,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:56:02,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:02,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:02,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:02,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:56:02,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:56:02,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960833263] [2020-10-26 20:56:02,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:02,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:56:02,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212768220] [2020-10-26 20:56:02,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:02,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:02,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:02,296 INFO L87 Difference]: Start difference. First operand 2530 states and 3546 transitions. Second operand 7 states. [2020-10-26 20:56:02,589 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:04,727 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:56:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:06,432 INFO L93 Difference]: Finished difference Result 6612 states and 10027 transitions. [2020-10-26 20:56:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:56:06,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 215 [2020-10-26 20:56:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:06,460 INFO L225 Difference]: With dead ends: 6612 [2020-10-26 20:56:06,460 INFO L226 Difference]: Without dead ends: 4830 [2020-10-26 20:56:06,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 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 20:56:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2020-10-26 20:56:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 4753. [2020-10-26 20:56:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4753 states. [2020-10-26 20:56:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 6810 transitions. [2020-10-26 20:56:06,640 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 6810 transitions. Word has length 215 [2020-10-26 20:56:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:06,641 INFO L481 AbstractCegarLoop]: Abstraction has 4753 states and 6810 transitions. [2020-10-26 20:56:06,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:56:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 6810 transitions. [2020-10-26 20:56:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 20:56:06,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:06,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:56:06,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:56:06,653 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1361533840, now seen corresponding path program 1 times [2020-10-26 20:56:06,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:06,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742945720] [2020-10-26 20:56:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:07,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:09,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:09,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:56:09,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:09,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2794 [2020-10-26 20:56:09,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:09,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:56:09,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:09,777 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:09,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:09,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:09,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:09,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:09,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:09,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:09,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:09,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:09,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:10,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:10,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:56:10,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:10,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:56:10,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:56:10,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:56:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742945720] [2020-10-26 20:56:10,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:10,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:10,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537629203] [2020-10-26 20:56:10,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:10,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:10,198 INFO L87 Difference]: Start difference. First operand 4753 states and 6810 transitions. Second operand 8 states. [2020-10-26 20:56:10,461 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:14,047 INFO L93 Difference]: Finished difference Result 10371 states and 15658 transitions. [2020-10-26 20:56:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:56:14,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 217 [2020-10-26 20:56:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:14,090 INFO L225 Difference]: With dead ends: 10371 [2020-10-26 20:56:14,090 INFO L226 Difference]: Without dead ends: 6788 [2020-10-26 20:56:14,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:56:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6788 states. [2020-10-26 20:56:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6788 to 6589. [2020-10-26 20:56:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6589 states. [2020-10-26 20:56:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 9556 transitions. [2020-10-26 20:56:14,360 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 9556 transitions. Word has length 217 [2020-10-26 20:56:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:14,360 INFO L481 AbstractCegarLoop]: Abstraction has 6589 states and 9556 transitions. [2020-10-26 20:56:14,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 9556 transitions. [2020-10-26 20:56:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-26 20:56:14,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:14,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:56:14,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:56:14,374 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash -831375932, now seen corresponding path program 1 times [2020-10-26 20:56:14,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732659675] [2020-10-26 20:56:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:14,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:15,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1544 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,204 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:16,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:56:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:16,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:16,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:56:16,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:56:16,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:16,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:56:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:56:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732659675] [2020-10-26 20:56:16,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:16,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:16,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603549854] [2020-10-26 20:56:16,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:16,528 INFO L87 Difference]: Start difference. First operand 6589 states and 9556 transitions. Second operand 7 states. [2020-10-26 20:56:17,059 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:18,242 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:22,576 INFO L93 Difference]: Finished difference Result 18635 states and 30486 transitions. [2020-10-26 20:56:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:56:22,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-10-26 20:56:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:22,647 INFO L225 Difference]: With dead ends: 18635 [2020-10-26 20:56:22,647 INFO L226 Difference]: Without dead ends: 13232 [2020-10-26 20:56:22,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:56:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13232 states. [2020-10-26 20:56:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13232 to 12866. [2020-10-26 20:56:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12866 states. [2020-10-26 20:56:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 17898 transitions. [2020-10-26 20:56:23,103 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 17898 transitions. Word has length 220 [2020-10-26 20:56:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:23,103 INFO L481 AbstractCegarLoop]: Abstraction has 12866 states and 17898 transitions. [2020-10-26 20:56:23,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:56:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 17898 transitions. [2020-10-26 20:56:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 20:56:23,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:23,127 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, 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] [2020-10-26 20:56:23,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:56:23,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash -395386948, now seen corresponding path program 1 times [2020-10-26 20:56:23,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170590261] [2020-10-26 20:56:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:23,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:23,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:25,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:26,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:28,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:28,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-26 20:56:28,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:28,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4852 [2020-10-26 20:56:28,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:56:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-26 20:56:28,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:28,396 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:28,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:28,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:28,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:28,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:56:28,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:28,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:28,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:28,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:28,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:28,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:56:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:56:28,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:56:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:28,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:56:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:28,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:28,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:28,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:56:28,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:28,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 20:56:28,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:56:28,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:56:28,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170590261] [2020-10-26 20:56:28,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:28,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:56:28,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766891086] [2020-10-26 20:56:28,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:56:28,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:28,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:56:28,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:56:28,976 INFO L87 Difference]: Start difference. First operand 12866 states and 17898 transitions. Second operand 6 states. [2020-10-26 20:56:29,238 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:32,332 INFO L93 Difference]: Finished difference Result 29316 states and 41408 transitions. [2020-10-26 20:56:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:56:32,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 270 [2020-10-26 20:56:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:32,409 INFO L225 Difference]: With dead ends: 29316 [2020-10-26 20:56:32,409 INFO L226 Difference]: Without dead ends: 17620 [2020-10-26 20:56:32,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17620 states. [2020-10-26 20:56:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17620 to 17390. [2020-10-26 20:56:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17390 states. [2020-10-26 20:56:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17390 states to 17390 states and 23038 transitions. [2020-10-26 20:56:32,902 INFO L78 Accepts]: Start accepts. Automaton has 17390 states and 23038 transitions. Word has length 270 [2020-10-26 20:56:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:32,903 INFO L481 AbstractCegarLoop]: Abstraction has 17390 states and 23038 transitions. [2020-10-26 20:56:32,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:56:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 17390 states and 23038 transitions. [2020-10-26 20:56:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-26 20:56:32,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:32,930 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-26 20:56:32,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:56:32,930 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash -50339816, now seen corresponding path program 1 times [2020-10-26 20:56:32,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:32,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403687006] [2020-10-26 20:56:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:33,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:38,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:38,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-26 20:56:38,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 20:56:38,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:56:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:38,476 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:38,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:38,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:38,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:38,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:56:38,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:38,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:38,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:38,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:38,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:56:38,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:38,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:56:38,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:56:38,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:38,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:56:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:38,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:38,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:38,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:56:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:38,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:56:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:38,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:38,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:38,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:56:38,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:38,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:56:38,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:38,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:38,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:56:38,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:38,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:39,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-26 20:56:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:39,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:39,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:39,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:39,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:56:39,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:56:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 104 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 20:56:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403687006] [2020-10-26 20:56:39,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:39,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:56:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820228536] [2020-10-26 20:56:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:39,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:39,220 INFO L87 Difference]: Start difference. First operand 17390 states and 23038 transitions. Second operand 8 states. [2020-10-26 20:56:39,511 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:41,922 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:56:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:43,856 INFO L93 Difference]: Finished difference Result 44701 states and 63202 transitions. [2020-10-26 20:56:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:56:43,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 287 [2020-10-26 20:56:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:43,986 INFO L225 Difference]: With dead ends: 44701 [2020-10-26 20:56:43,986 INFO L226 Difference]: Without dead ends: 28933 [2020-10-26 20:56:44,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:56:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28933 states. [2020-10-26 20:56:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28933 to 28259. [2020-10-26 20:56:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28259 states. [2020-10-26 20:56:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28259 states to 28259 states and 37633 transitions. [2020-10-26 20:56:45,075 INFO L78 Accepts]: Start accepts. Automaton has 28259 states and 37633 transitions. Word has length 287 [2020-10-26 20:56:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:45,076 INFO L481 AbstractCegarLoop]: Abstraction has 28259 states and 37633 transitions. [2020-10-26 20:56:45,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 28259 states and 37633 transitions. [2020-10-26 20:56:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-26 20:56:45,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:45,125 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:56:45,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:56:45,126 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1741698972, now seen corresponding path program 1 times [2020-10-26 20:56:45,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:45,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878617095] [2020-10-26 20:56:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:45,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:45,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:45,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:45,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-26 20:56:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:56:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:56:50,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 20:56:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:50,491 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:50,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:50,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:56:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:50,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:56:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:50,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:56:50,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:50,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 20:56:50,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:50,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:50,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:56:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:50,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:56:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:50,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:50,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:56:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:56:50,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:50,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:56:50,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:56:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:50,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:50,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 20:56:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:56:50,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 143 proven. 98 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 20:56:51,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878617095] [2020-10-26 20:56:51,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:51,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:56:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468909084] [2020-10-26 20:56:51,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:51,118 INFO L87 Difference]: Start difference. First operand 28259 states and 37633 transitions. Second operand 8 states. [2020-10-26 20:56:51,476 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:53,705 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:56:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:55,135 INFO L93 Difference]: Finished difference Result 63783 states and 84826 transitions. [2020-10-26 20:56:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:56:55,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 325 [2020-10-26 20:56:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:55,274 INFO L225 Difference]: With dead ends: 63783 [2020-10-26 20:56:55,274 INFO L226 Difference]: Without dead ends: 35854 [2020-10-26 20:56:55,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:56:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35854 states. [2020-10-26 20:56:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35854 to 35329. [2020-10-26 20:56:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35329 states. [2020-10-26 20:56:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35329 states to 35329 states and 46841 transitions. [2020-10-26 20:56:56,305 INFO L78 Accepts]: Start accepts. Automaton has 35329 states and 46841 transitions. Word has length 325 [2020-10-26 20:56:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:56,306 INFO L481 AbstractCegarLoop]: Abstraction has 35329 states and 46841 transitions. [2020-10-26 20:56:56,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35329 states and 46841 transitions. [2020-10-26 20:56:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-26 20:56:56,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:56,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-10-26 20:56:56,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:56:56,359 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:56,359 INFO L82 PathProgramCache]: Analyzing trace with hash 168270100, now seen corresponding path program 1 times [2020-10-26 20:56:56,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:56,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501863824] [2020-10-26 20:56:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:57,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 353 [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:01,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 20:57:01,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:01,800 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:01,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:01,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:01,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:01,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:01,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:01,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:01,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:57:01,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:57:01,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:57:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:01,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:57:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:02,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:02,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 20:57:02,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:02,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-10-26 20:57:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:02,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:02,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:57:02,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:02,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:57:02,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:57:02,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 148 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 20:57:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501863824] [2020-10-26 20:57:02,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:02,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:57:02,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615877903] [2020-10-26 20:57:02,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:02,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:02,561 INFO L87 Difference]: Start difference. First operand 35329 states and 46841 transitions. Second operand 7 states. [2020-10-26 20:57:02,831 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:57:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:06,858 INFO L93 Difference]: Finished difference Result 88609 states and 120708 transitions. [2020-10-26 20:57:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:57:06,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 337 [2020-10-26 20:57:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:07,124 INFO L225 Difference]: With dead ends: 88609 [2020-10-26 20:57:07,125 INFO L226 Difference]: Without dead ends: 55535 [2020-10-26 20:57:07,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:57:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55535 states. [2020-10-26 20:57:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55535 to 53892. [2020-10-26 20:57:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53892 states. [2020-10-26 20:57:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53892 states to 53892 states and 72774 transitions. [2020-10-26 20:57:08,742 INFO L78 Accepts]: Start accepts. Automaton has 53892 states and 72774 transitions. Word has length 337 [2020-10-26 20:57:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:08,742 INFO L481 AbstractCegarLoop]: Abstraction has 53892 states and 72774 transitions. [2020-10-26 20:57:08,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 53892 states and 72774 transitions. [2020-10-26 20:57:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-10-26 20:57:09,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:09,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-10-26 20:57:09,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:57:09,152 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1611115713, now seen corresponding path program 1 times [2020-10-26 20:57:09,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:09,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376050690] [2020-10-26 20:57:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:09,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:09,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:09,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:10,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:14,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:57:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 20:57:14,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:14,583 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:14,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:14,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:14,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:14,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:14,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:14,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:57:14,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:14,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:57:14,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:14,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:14,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:14,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:57:14,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:57:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:14,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:14,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:14,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:57:14,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 20:57:14,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:14,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:57:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:15,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 20:57:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:15,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:15,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:15,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-26 20:57:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:15,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:15,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 177 proven. 60 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-26 20:57:15,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376050690] [2020-10-26 20:57:15,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:15,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:57:15,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204298593] [2020-10-26 20:57:15,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:15,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:15,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:15,300 INFO L87 Difference]: Start difference. First operand 53892 states and 72774 transitions. Second operand 7 states. [2020-10-26 20:57:15,848 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:57:17,681 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:57:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:20,756 INFO L93 Difference]: Finished difference Result 128634 states and 188884 transitions. [2020-10-26 20:57:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:57:20,756 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 343 [2020-10-26 20:57:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:21,267 INFO L225 Difference]: With dead ends: 128634 [2020-10-26 20:57:21,267 INFO L226 Difference]: Without dead ends: 75073 [2020-10-26 20:57:21,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:57:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75073 states. [2020-10-26 20:57:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75073 to 73479. [2020-10-26 20:57:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73479 states. [2020-10-26 20:57:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73479 states to 73479 states and 94992 transitions. [2020-10-26 20:57:23,902 INFO L78 Accepts]: Start accepts. Automaton has 73479 states and 94992 transitions. Word has length 343 [2020-10-26 20:57:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:23,903 INFO L481 AbstractCegarLoop]: Abstraction has 73479 states and 94992 transitions. [2020-10-26 20:57:23,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 73479 states and 94992 transitions. [2020-10-26 20:57:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-26 20:57:24,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:24,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-26 20:57:24,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:57:24,002 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 495405719, now seen corresponding path program 1 times [2020-10-26 20:57:24,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:24,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113198135] [2020-10-26 20:57:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:24,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:24,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:24,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:24,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:27,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-26 20:57:29,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:57:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 20:57:29,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:57:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:57:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,369 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:29,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:29,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:29,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:29,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,537 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:57:29,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:57:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:57:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:57:29,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:57:29,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:57:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:57:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:57:29,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:57:29,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:57:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 20:57:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-26 20:57:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:57:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-10-26 20:57:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:29,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:57:29,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:29,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:57:29,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:29,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:57:29,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:29,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 169 proven. 100 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-26 20:57:30,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113198135] [2020-10-26 20:57:30,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:30,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:57:30,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384926824] [2020-10-26 20:57:30,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:57:30,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:30,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:57:30,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:57:30,051 INFO L87 Difference]: Start difference. First operand 73479 states and 94992 transitions. Second operand 10 states. [2020-10-26 20:57:30,305 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:57:30,667 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:57:31,377 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-26 20:57:37,048 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:57:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:38,666 INFO L93 Difference]: Finished difference Result 228477 states and 297810 transitions. [2020-10-26 20:57:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:57:38,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 345 [2020-10-26 20:57:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:39,132 INFO L225 Difference]: With dead ends: 228477 [2020-10-26 20:57:39,132 INFO L226 Difference]: Without dead ends: 155119 [2020-10-26 20:57:39,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:57:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155119 states. [2020-10-26 20:57:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155119 to 154324. [2020-10-26 20:57:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154324 states. [2020-10-26 20:57:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154324 states to 154324 states and 200575 transitions. [2020-10-26 20:57:43,600 INFO L78 Accepts]: Start accepts. Automaton has 154324 states and 200575 transitions. Word has length 345 [2020-10-26 20:57:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:43,600 INFO L481 AbstractCegarLoop]: Abstraction has 154324 states and 200575 transitions. [2020-10-26 20:57:43,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:57:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 154324 states and 200575 transitions. [2020-10-26 20:57:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-26 20:57:43,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:43,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-10-26 20:57:43,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:57:43,693 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:43,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1917032791, now seen corresponding path program 1 times [2020-10-26 20:57:43,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:43,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434273923] [2020-10-26 20:57:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:43,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:44,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:48,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 20:57:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:49,047 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:49,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:49,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:49,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:49,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:49,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:57:49,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:49,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:49,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:49,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:49,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:57:49,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:49,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:57:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:49,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 20:57:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:49,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:57:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:49,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:49,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:49,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-26 20:57:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:57:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:49,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 171 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 20:57:49,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434273923] [2020-10-26 20:57:49,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:49,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:57:49,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227799511] [2020-10-26 20:57:49,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:57:49,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:57:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:57:49,918 INFO L87 Difference]: Start difference. First operand 154324 states and 200575 transitions. Second operand 8 states. [2020-10-26 20:57:50,210 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:57:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:57,780 INFO L93 Difference]: Finished difference Result 410306 states and 552855 transitions. [2020-10-26 20:57:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:57:57,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 354 [2020-10-26 20:57:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:59,436 INFO L225 Difference]: With dead ends: 410306 [2020-10-26 20:57:59,436 INFO L226 Difference]: Without dead ends: 270978 [2020-10-26 20:57:59,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:58:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270978 states.