/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:59:14,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:59:14,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:59:14,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:59:14,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:59:14,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:59:14,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:59:14,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:59:14,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:59:14,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:59:14,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:59:14,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:59:14,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:59:14,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:59:14,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:59:14,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:59:14,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:59:14,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:59:14,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:59:14,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:59:14,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:59:14,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:59:14,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:59:14,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:59:14,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:59:14,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:59:14,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:59:14,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:59:14,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:59:14,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:59:14,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:59:14,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:59:14,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:59:14,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:59:14,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:59:14,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:59:14,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:59:14,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:59:14,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:59:14,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:59:14,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:59:14,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:59:14,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:59:14,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:59:14,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:59:14,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:59:14,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:59:14,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:59:14,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:59:14,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:59:14,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:59:14,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:59:14,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:59:14,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:59:14,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:59:14,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:59:14,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:59:14,504 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:59:14,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:59:14,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:59:14,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:59:14,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:59:14,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:59:14,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:59:14,505 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:59:14,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:59:14,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:59:14,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:59:14,777 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:59:14,778 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:59:14,779 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 19:59:14,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2891eecd2/6c7ef252369e41c48e7d34ae0aa77fff/FLAGe901d6d2c [2020-08-22 19:59:15,471 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:59:15,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 19:59:15,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2891eecd2/6c7ef252369e41c48e7d34ae0aa77fff/FLAGe901d6d2c [2020-08-22 19:59:15,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2891eecd2/6c7ef252369e41c48e7d34ae0aa77fff [2020-08-22 19:59:15,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:59:15,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:59:15,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:59:15,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:59:15,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:59:15,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:59:15" (1/1) ... [2020-08-22 19:59:15,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e3e6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:15, skipping insertion in model container [2020-08-22 19:59:15,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:59:15" (1/1) ... [2020-08-22 19:59:15,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:59:15,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:59:16,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:59:16,808 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:59:17,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:59:17,320 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:59:17,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17 WrapperNode [2020-08-22 19:59:17,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:59:17,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:59:17,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:59:17,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:59:17,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... [2020-08-22 19:59:17,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:59:17,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:59:17,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:59:17,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:59:17,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 19:59:17,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:59:17,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:59:17,587 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:59:17,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:59:17,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:59:17,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 19:59:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 19:59:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 19:59:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:59:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:59:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 19:59:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 19:59:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 19:59:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 19:59:17,590 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 19:59:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 19:59:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 19:59:17,591 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 19:59:17,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:59:17,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:59:17,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:59:20,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:59:20,731 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 19:59:20,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:59:20 BoogieIcfgContainer [2020-08-22 19:59:20,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:59:20,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:59:20,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:59:20,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:59:20,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:59:15" (1/3) ... [2020-08-22 19:59:20,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50587814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:59:20, skipping insertion in model container [2020-08-22 19:59:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:59:17" (2/3) ... [2020-08-22 19:59:20,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50587814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:59:20, skipping insertion in model container [2020-08-22 19:59:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:59:20" (3/3) ... [2020-08-22 19:59:20,754 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 19:59:20,767 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:59:20,779 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:59:20,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:59:20,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:59:20,825 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:59:20,825 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:59:20,825 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:59:20,826 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:59:20,826 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:59:20,826 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:59:20,826 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:59:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states. [2020-08-22 19:59:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2020-08-22 19:59:20,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:59:20,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:59:20,988 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:59:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:59:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash -272093385, now seen corresponding path program 1 times [2020-08-22 19:59:21,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:59:21,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866541667] [2020-08-22 19:59:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:59:21,088 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:59:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:23,024 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 19:59:23,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:59:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:59:24,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866541667] [2020-08-22 19:59:24,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:59:24,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:59:24,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392425807] [2020-08-22 19:59:24,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:59:24,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:59:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:59:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:59:24,082 INFO L87 Difference]: Start difference. First operand 2022 states. Second operand 4 states. [2020-08-22 19:59:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:59:32,692 INFO L93 Difference]: Finished difference Result 3529 states and 4643 transitions. [2020-08-22 19:59:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:59:32,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 932 [2020-08-22 19:59:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:59:32,748 INFO L225 Difference]: With dead ends: 3529 [2020-08-22 19:59:32,749 INFO L226 Difference]: Without dead ends: 2855 [2020-08-22 19:59:32,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:59:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2020-08-22 19:59:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2842. [2020-08-22 19:59:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2020-08-22 19:59:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3559 transitions. [2020-08-22 19:59:33,039 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3559 transitions. Word has length 932 [2020-08-22 19:59:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:59:33,043 INFO L479 AbstractCegarLoop]: Abstraction has 2842 states and 3559 transitions. [2020-08-22 19:59:33,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:59:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3559 transitions. [2020-08-22 19:59:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2020-08-22 19:59:33,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:59:33,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:59:33,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:59:33,110 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:59:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:59:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1335477111, now seen corresponding path program 1 times [2020-08-22 19:59:33,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:59:33,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468586627] [2020-08-22 19:59:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:59:33,119 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:59:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:34,576 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 19:59:34,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:59:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:59:35,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468586627] [2020-08-22 19:59:35,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:59:35,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:59:35,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275681718] [2020-08-22 19:59:35,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:59:35,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:59:35,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:59:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:59:35,222 INFO L87 Difference]: Start difference. First operand 2842 states and 3559 transitions. Second operand 5 states. [2020-08-22 19:59:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:59:47,499 INFO L93 Difference]: Finished difference Result 7834 states and 9940 transitions. [2020-08-22 19:59:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:59:47,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 932 [2020-08-22 19:59:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:59:47,526 INFO L225 Difference]: With dead ends: 7834 [2020-08-22 19:59:47,527 INFO L226 Difference]: Without dead ends: 5296 [2020-08-22 19:59:47,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:59:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2020-08-22 19:59:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 5294. [2020-08-22 19:59:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5294 states. [2020-08-22 19:59:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 6672 transitions. [2020-08-22 19:59:47,789 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 6672 transitions. Word has length 932 [2020-08-22 19:59:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:59:47,791 INFO L479 AbstractCegarLoop]: Abstraction has 5294 states and 6672 transitions. [2020-08-22 19:59:47,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:59:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 6672 transitions. [2020-08-22 19:59:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2020-08-22 19:59:47,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:59:47,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:59:47,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:59:47,874 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:59:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:59:47,875 INFO L82 PathProgramCache]: Analyzing trace with hash 628389466, now seen corresponding path program 1 times [2020-08-22 19:59:47,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:59:47,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399329951] [2020-08-22 19:59:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:59:47,879 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:59:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:48,784 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 19:59:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:59:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:59:49,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399329951] [2020-08-22 19:59:49,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:59:49,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:59:49,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667641808] [2020-08-22 19:59:49,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:59:49,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:59:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:59:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:59:49,348 INFO L87 Difference]: Start difference. First operand 5294 states and 6672 transitions. Second operand 4 states. [2020-08-22 20:00:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:00:02,985 INFO L93 Difference]: Finished difference Result 14897 states and 18867 transitions. [2020-08-22 20:00:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:00:02,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 934 [2020-08-22 20:00:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:00:03,029 INFO L225 Difference]: With dead ends: 14897 [2020-08-22 20:00:03,029 INFO L226 Difference]: Without dead ends: 10113 [2020-08-22 20:00:03,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:00:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2020-08-22 20:00:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 10111. [2020-08-22 20:00:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10111 states. [2020-08-22 20:00:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10111 states to 10111 states and 12768 transitions. [2020-08-22 20:00:03,566 INFO L78 Accepts]: Start accepts. Automaton has 10111 states and 12768 transitions. Word has length 934 [2020-08-22 20:00:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:00:03,567 INFO L479 AbstractCegarLoop]: Abstraction has 10111 states and 12768 transitions. [2020-08-22 20:00:03,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:00:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 10111 states and 12768 transitions. [2020-08-22 20:00:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2020-08-22 20:00:03,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:00:03,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:00:03,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 20:00:03,593 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:00:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:00:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1532255505, now seen corresponding path program 1 times [2020-08-22 20:00:03,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:00:03,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520969888] [2020-08-22 20:00:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:00:03,598 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:00:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:04,310 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:00:04,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:00:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:00:04,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520969888] [2020-08-22 20:00:04,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:00:04,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:00:04,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239200758] [2020-08-22 20:00:04,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:00:04,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:00:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:00:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:00:04,739 INFO L87 Difference]: Start difference. First operand 10111 states and 12768 transitions. Second operand 4 states. [2020-08-22 20:00:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:00:19,007 INFO L93 Difference]: Finished difference Result 29635 states and 37557 transitions. [2020-08-22 20:00:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:00:19,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 934 [2020-08-22 20:00:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:00:19,075 INFO L225 Difference]: With dead ends: 29635 [2020-08-22 20:00:19,075 INFO L226 Difference]: Without dead ends: 19875 [2020-08-22 20:00:19,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:00:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2020-08-22 20:00:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 10133. [2020-08-22 20:00:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10133 states. [2020-08-22 20:00:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 12799 transitions. [2020-08-22 20:00:19,760 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 12799 transitions. Word has length 934 [2020-08-22 20:00:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:00:19,761 INFO L479 AbstractCegarLoop]: Abstraction has 10133 states and 12799 transitions. [2020-08-22 20:00:19,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:00:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 12799 transitions. [2020-08-22 20:00:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2020-08-22 20:00:19,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:00:19,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:00:19,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 20:00:19,788 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:00:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:00:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash -583052477, now seen corresponding path program 1 times [2020-08-22 20:00:19,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:00:19,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097023452] [2020-08-22 20:00:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:00:19,793 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:00:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:20,567 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:00:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:00:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:00:21,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097023452] [2020-08-22 20:00:21,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:00:21,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:00:21,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459690554] [2020-08-22 20:00:21,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:00:21,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:00:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:00:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:00:21,047 INFO L87 Difference]: Start difference. First operand 10133 states and 12799 transitions. Second operand 4 states. [2020-08-22 20:00:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:00:35,563 INFO L93 Difference]: Finished difference Result 29649 states and 37573 transitions. [2020-08-22 20:00:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:00:35,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 935 [2020-08-22 20:00:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:00:35,620 INFO L225 Difference]: With dead ends: 29649 [2020-08-22 20:00:35,621 INFO L226 Difference]: Without dead ends: 19890 [2020-08-22 20:00:35,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:00:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19890 states. [2020-08-22 20:00:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19890 to 10153. [2020-08-22 20:00:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10153 states. [2020-08-22 20:00:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 12822 transitions. [2020-08-22 20:00:36,972 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 12822 transitions. Word has length 935 [2020-08-22 20:00:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:00:36,973 INFO L479 AbstractCegarLoop]: Abstraction has 10153 states and 12822 transitions. [2020-08-22 20:00:36,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:00:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 12822 transitions. [2020-08-22 20:00:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2020-08-22 20:00:37,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:00:37,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:00:37,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 20:00:37,008 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:00:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:00:37,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1601274050, now seen corresponding path program 1 times [2020-08-22 20:00:37,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:00:37,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011821498] [2020-08-22 20:00:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:00:37,015 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:00:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:38,101 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:00:38,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:00:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:00:38,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011821498] [2020-08-22 20:00:38,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:00:38,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 20:00:38,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367470512] [2020-08-22 20:00:38,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 20:00:38,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:00:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 20:00:38,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 20:00:38,678 INFO L87 Difference]: Start difference. First operand 10153 states and 12822 transitions. Second operand 5 states. [2020-08-22 20:00:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:00:51,565 INFO L93 Difference]: Finished difference Result 29128 states and 36859 transitions. [2020-08-22 20:00:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 20:00:51,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 936 [2020-08-22 20:00:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:00:51,603 INFO L225 Difference]: With dead ends: 29128 [2020-08-22 20:00:51,603 INFO L226 Difference]: Without dead ends: 19324 [2020-08-22 20:00:51,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 20:00:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19324 states. [2020-08-22 20:00:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19324 to 19322. [2020-08-22 20:00:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19322 states. [2020-08-22 20:00:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19322 states to 19322 states and 24328 transitions. [2020-08-22 20:00:52,811 INFO L78 Accepts]: Start accepts. Automaton has 19322 states and 24328 transitions. Word has length 936 [2020-08-22 20:00:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:00:52,812 INFO L479 AbstractCegarLoop]: Abstraction has 19322 states and 24328 transitions. [2020-08-22 20:00:52,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 20:00:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 19322 states and 24328 transitions. [2020-08-22 20:00:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2020-08-22 20:00:52,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:00:52,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:00:52,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 20:00:52,846 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:00:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:00:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash -770592943, now seen corresponding path program 1 times [2020-08-22 20:00:52,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:00:52,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404982435] [2020-08-22 20:00:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:00:52,850 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:00:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:53,876 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:00:53,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:00:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:00:54,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404982435] [2020-08-22 20:00:54,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:00:54,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 20:00:54,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900676334] [2020-08-22 20:00:54,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 20:00:54,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:00:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 20:00:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 20:00:54,649 INFO L87 Difference]: Start difference. First operand 19322 states and 24328 transitions. Second operand 5 states. [2020-08-22 20:01:09,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:01:09,411 INFO L93 Difference]: Finished difference Result 56278 states and 70920 transitions. [2020-08-22 20:01:09,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 20:01:09,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 938 [2020-08-22 20:01:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:01:09,495 INFO L225 Difference]: With dead ends: 56278 [2020-08-22 20:01:09,496 INFO L226 Difference]: Without dead ends: 37446 [2020-08-22 20:01:09,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 20:01:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37446 states. [2020-08-22 20:01:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37446 to 37444. [2020-08-22 20:01:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37444 states. [2020-08-22 20:01:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37444 states to 37444 states and 47004 transitions. [2020-08-22 20:01:12,333 INFO L78 Accepts]: Start accepts. Automaton has 37444 states and 47004 transitions. Word has length 938 [2020-08-22 20:01:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:01:12,334 INFO L479 AbstractCegarLoop]: Abstraction has 37444 states and 47004 transitions. [2020-08-22 20:01:12,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 20:01:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 37444 states and 47004 transitions. [2020-08-22 20:01:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 941 [2020-08-22 20:01:12,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:01:12,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:01:12,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 20:01:12,371 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:01:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:01:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1904393481, now seen corresponding path program 1 times [2020-08-22 20:01:12,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:01:12,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437479880] [2020-08-22 20:01:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:01:12,375 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:01:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:01:13,125 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:01:13,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:01:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:01:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:01:13,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437479880] [2020-08-22 20:01:13,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:01:13,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:01:13,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659457680] [2020-08-22 20:01:13,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:01:13,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:01:13,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:01:13,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:01:13,522 INFO L87 Difference]: Start difference. First operand 37444 states and 47004 transitions. Second operand 4 states. [2020-08-22 20:01:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:01:33,378 INFO L93 Difference]: Finished difference Result 111200 states and 139686 transitions. [2020-08-22 20:01:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:01:33,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 940 [2020-08-22 20:01:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:01:33,517 INFO L225 Difference]: With dead ends: 111200 [2020-08-22 20:01:33,518 INFO L226 Difference]: Without dead ends: 74328 [2020-08-22 20:01:33,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:01:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74328 states. [2020-08-22 20:01:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74328 to 37540. [2020-08-22 20:01:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37540 states. [2020-08-22 20:01:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37540 states to 37540 states and 47136 transitions. [2020-08-22 20:01:39,066 INFO L78 Accepts]: Start accepts. Automaton has 37540 states and 47136 transitions. Word has length 940 [2020-08-22 20:01:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:01:39,066 INFO L479 AbstractCegarLoop]: Abstraction has 37540 states and 47136 transitions. [2020-08-22 20:01:39,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:01:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 37540 states and 47136 transitions. [2020-08-22 20:01:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 941 [2020-08-22 20:01:39,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:01:39,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:01:39,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 20:01:39,103 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:01:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:01:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1476205682, now seen corresponding path program 1 times [2020-08-22 20:01:39,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:01:39,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133850095] [2020-08-22 20:01:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:01:39,108 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:01:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:01:39,949 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:01:39,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:01:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:01:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:01:40,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133850095] [2020-08-22 20:01:40,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:01:40,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:01:40,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158812496] [2020-08-22 20:01:40,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:01:40,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:01:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:01:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:01:40,457 INFO L87 Difference]: Start difference. First operand 37540 states and 47136 transitions. Second operand 4 states. [2020-08-22 20:02:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:02:01,152 INFO L93 Difference]: Finished difference Result 109396 states and 137248 transitions. [2020-08-22 20:02:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:02:01,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 940 [2020-08-22 20:02:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:02:01,245 INFO L225 Difference]: With dead ends: 109396 [2020-08-22 20:02:01,246 INFO L226 Difference]: Without dead ends: 73124 [2020-08-22 20:02:01,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:02:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73124 states. [2020-08-22 20:02:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73124 to 73122. [2020-08-22 20:02:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73122 states. [2020-08-22 20:02:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73122 states to 73122 states and 91514 transitions. [2020-08-22 20:02:08,896 INFO L78 Accepts]: Start accepts. Automaton has 73122 states and 91514 transitions. Word has length 940 [2020-08-22 20:02:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:02:08,897 INFO L479 AbstractCegarLoop]: Abstraction has 73122 states and 91514 transitions. [2020-08-22 20:02:08,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:02:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 73122 states and 91514 transitions. [2020-08-22 20:02:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2020-08-22 20:02:08,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:02:08,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:02:08,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 20:02:08,962 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:02:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:02:08,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1489874573, now seen corresponding path program 1 times [2020-08-22 20:02:08,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:02:08,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143634298] [2020-08-22 20:02:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:02:08,966 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:02:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:09,889 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:02:09,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:02:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:02:10,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143634298] [2020-08-22 20:02:10,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:02:10,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:02:10,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682926566] [2020-08-22 20:02:10,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:02:10,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:02:10,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:02:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:02:10,263 INFO L87 Difference]: Start difference. First operand 73122 states and 91514 transitions. Second operand 4 states. [2020-08-22 20:02:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:02:38,836 INFO L93 Difference]: Finished difference Result 217536 states and 272218 transitions. [2020-08-22 20:02:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:02:38,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 941 [2020-08-22 20:02:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:02:38,994 INFO L225 Difference]: With dead ends: 217536 [2020-08-22 20:02:38,994 INFO L226 Difference]: Without dead ends: 145350 [2020-08-22 20:02:39,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:02:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145350 states. [2020-08-22 20:02:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145350 to 73228. [2020-08-22 20:02:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73228 states. [2020-08-22 20:02:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73228 states to 73228 states and 91634 transitions. [2020-08-22 20:02:46,262 INFO L78 Accepts]: Start accepts. Automaton has 73228 states and 91634 transitions. Word has length 941 [2020-08-22 20:02:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:02:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 73228 states and 91634 transitions. [2020-08-22 20:02:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:02:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 73228 states and 91634 transitions. [2020-08-22 20:02:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2020-08-22 20:02:46,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:02:46,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:02:46,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 20:02:46,315 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:02:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:02:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -279340950, now seen corresponding path program 1 times [2020-08-22 20:02:46,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:02:46,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24699442] [2020-08-22 20:02:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:02:46,318 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:02:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:47,285 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:02:47,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:02:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:02:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:02:49,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24699442] [2020-08-22 20:02:49,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:02:49,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:02:49,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478854115] [2020-08-22 20:02:49,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:02:49,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:02:49,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:02:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:02:49,277 INFO L87 Difference]: Start difference. First operand 73228 states and 91634 transitions. Second operand 4 states. [2020-08-22 20:03:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:03:17,975 INFO L93 Difference]: Finished difference Result 214164 states and 267682 transitions. [2020-08-22 20:03:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:03:17,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 942 [2020-08-22 20:03:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:03:18,119 INFO L225 Difference]: With dead ends: 214164 [2020-08-22 20:03:18,119 INFO L226 Difference]: Without dead ends: 142642 [2020-08-22 20:03:18,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:03:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142642 states. [2020-08-22 20:03:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142642 to 142640. [2020-08-22 20:03:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142640 states. [2020-08-22 20:03:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142640 states to 142640 states and 177784 transitions. [2020-08-22 20:03:34,664 INFO L78 Accepts]: Start accepts. Automaton has 142640 states and 177784 transitions. Word has length 942 [2020-08-22 20:03:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:03:34,664 INFO L479 AbstractCegarLoop]: Abstraction has 142640 states and 177784 transitions. [2020-08-22 20:03:34,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:03:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 142640 states and 177784 transitions. [2020-08-22 20:03:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2020-08-22 20:03:34,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:03:34,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:03:34,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 20:03:34,762 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:03:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:03:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1077336086, now seen corresponding path program 1 times [2020-08-22 20:03:34,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:03:34,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850824461] [2020-08-22 20:03:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:03:34,767 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:03:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:03:35,914 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:03:35,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:03:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:03:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:03:36,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850824461] [2020-08-22 20:03:36,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:03:36,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 20:03:36,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089920783] [2020-08-22 20:03:36,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 20:03:36,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:03:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 20:03:36,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 20:03:36,702 INFO L87 Difference]: Start difference. First operand 142640 states and 177784 transitions. Second operand 5 states. [2020-08-22 20:04:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:04:22,179 INFO L93 Difference]: Finished difference Result 418744 states and 521291 transitions. [2020-08-22 20:04:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 20:04:22,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 942 [2020-08-22 20:04:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:04:22,456 INFO L225 Difference]: With dead ends: 418744 [2020-08-22 20:04:22,456 INFO L226 Difference]: Without dead ends: 276956 [2020-08-22 20:04:22,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 20:04:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276956 states. [2020-08-22 20:04:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276956 to 276954. [2020-08-22 20:04:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276954 states. [2020-08-22 20:04:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276954 states to 276954 states and 343377 transitions. [2020-08-22 20:04:58,308 INFO L78 Accepts]: Start accepts. Automaton has 276954 states and 343377 transitions. Word has length 942 [2020-08-22 20:04:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:04:58,309 INFO L479 AbstractCegarLoop]: Abstraction has 276954 states and 343377 transitions. [2020-08-22 20:04:58,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 20:04:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 276954 states and 343377 transitions. [2020-08-22 20:04:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2020-08-22 20:04:58,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:04:58,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:04:58,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 20:04:58,511 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:04:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:04:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -50926921, now seen corresponding path program 1 times [2020-08-22 20:04:58,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:04:58,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448227630] [2020-08-22 20:04:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:04:58,515 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:04:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:05:00,229 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:05:00,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:05:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:05:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:05:00,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448227630] [2020-08-22 20:05:00,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:05:00,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 20:05:00,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246969507] [2020-08-22 20:05:00,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 20:05:00,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:05:00,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 20:05:00,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 20:05:00,787 INFO L87 Difference]: Start difference. First operand 276954 states and 343377 transitions. Second operand 5 states. [2020-08-22 20:05:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:05:55,123 INFO L93 Difference]: Finished difference Result 569448 states and 707029 transitions. [2020-08-22 20:05:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 20:05:55,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 944 [2020-08-22 20:05:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:05:55,438 INFO L225 Difference]: With dead ends: 569448 [2020-08-22 20:05:55,439 INFO L226 Difference]: Without dead ends: 294516 [2020-08-22 20:05:55,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 20:05:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294516 states. [2020-08-22 20:06:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294516 to 277284. [2020-08-22 20:06:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277284 states. [2020-08-22 20:06:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277284 states to 277284 states and 343749 transitions. [2020-08-22 20:06:37,285 INFO L78 Accepts]: Start accepts. Automaton has 277284 states and 343749 transitions. Word has length 944 [2020-08-22 20:06:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:06:37,285 INFO L479 AbstractCegarLoop]: Abstraction has 277284 states and 343749 transitions. [2020-08-22 20:06:37,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 20:06:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 277284 states and 343749 transitions. [2020-08-22 20:06:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-08-22 20:06:37,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:06:37,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:06:37,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 20:06:37,499 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:06:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:06:37,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2080605137, now seen corresponding path program 1 times [2020-08-22 20:06:37,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:06:37,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492981405] [2020-08-22 20:06:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:06:37,503 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:06:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:06:38,289 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:06:38,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:06:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:06:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:06:39,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492981405] [2020-08-22 20:06:39,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:06:39,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:06:39,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056903449] [2020-08-22 20:06:39,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:06:39,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:06:39,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:06:39,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:06:39,266 INFO L87 Difference]: Start difference. First operand 277284 states and 343749 transitions. Second operand 4 states. [2020-08-22 20:08:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:08:14,471 INFO L93 Difference]: Finished difference Result 826392 states and 1024155 transitions. [2020-08-22 20:08:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:08:14,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 946 [2020-08-22 20:08:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:08:15,074 INFO L225 Difference]: With dead ends: 826392 [2020-08-22 20:08:15,074 INFO L226 Difference]: Without dead ends: 551814 [2020-08-22 20:08:15,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:08:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551814 states. [2020-08-22 20:08:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551814 to 277908. [2020-08-22 20:08:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277908 states. [2020-08-22 20:09:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277908 states to 277908 states and 344601 transitions. [2020-08-22 20:09:00,347 INFO L78 Accepts]: Start accepts. Automaton has 277908 states and 344601 transitions. Word has length 946 [2020-08-22 20:09:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:09:00,348 INFO L479 AbstractCegarLoop]: Abstraction has 277908 states and 344601 transitions. [2020-08-22 20:09:00,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:09:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 277908 states and 344601 transitions. [2020-08-22 20:09:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2020-08-22 20:09:00,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:09:00,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:09:00,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 20:09:00,589 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:09:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:09:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -931756617, now seen corresponding path program 1 times [2020-08-22 20:09:00,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:09:00,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170701076] [2020-08-22 20:09:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:09:00,593 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:09:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:09:01,321 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:09:01,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:09:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:09:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:09:02,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170701076] [2020-08-22 20:09:02,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:09:02,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 20:09:02,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125993188] [2020-08-22 20:09:02,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 20:09:02,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:09:02,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 20:09:02,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:09:02,224 INFO L87 Difference]: Start difference. First operand 277908 states and 344601 transitions. Second operand 4 states. [2020-08-22 20:10:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:10:39,941 INFO L93 Difference]: Finished difference Result 826848 states and 1024659 transitions. [2020-08-22 20:10:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 20:10:39,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 947 [2020-08-22 20:10:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:10:40,566 INFO L225 Difference]: With dead ends: 826848 [2020-08-22 20:10:40,566 INFO L226 Difference]: Without dead ends: 552270 [2020-08-22 20:10:40,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 20:10:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552270 states. [2020-08-22 20:11:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552270 to 278508. [2020-08-22 20:11:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278508 states. [2020-08-22 20:11:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278508 states to 278508 states and 345297 transitions. [2020-08-22 20:11:29,382 INFO L78 Accepts]: Start accepts. Automaton has 278508 states and 345297 transitions. Word has length 947 [2020-08-22 20:11:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:11:29,383 INFO L479 AbstractCegarLoop]: Abstraction has 278508 states and 345297 transitions. [2020-08-22 20:11:29,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 20:11:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 278508 states and 345297 transitions. [2020-08-22 20:11:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2020-08-22 20:11:29,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:11:29,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 20:11:29,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 20:11:29,610 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:11:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:11:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1340943806, now seen corresponding path program 1 times [2020-08-22 20:11:29,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:11:29,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387025094] [2020-08-22 20:11:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:11:29,614 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:11:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:11:30,542 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 20:11:30,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:11:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat