/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:01:39,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:01:39,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:01:39,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:01:39,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:01:39,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:01:39,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:01:39,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:01:39,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:01:39,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:01:39,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:01:39,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:01:39,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:01:39,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:01:39,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:01:39,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:01:39,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:01:39,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:01:39,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:01:39,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:01:39,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:01:39,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:01:39,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:01:39,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:01:39,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 23:01:39,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 23:01:39,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 23:01:39,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 23:01:39,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 23:01:39,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 23:01:39,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 23:01:39,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 23:01:39,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 23:01:39,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 23:01:39,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 23:01:39,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 23:01:39,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 23:01:39,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 23:01:39,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:01:39,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:01:39,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:01:39,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:01:39,662 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:01:39,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:01:39,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:01:39,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:01:39,668 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:01:39,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:01:39,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:01:39,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:01:39,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:01:39,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:01:39,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:01:39,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:01:39,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:01:39,671 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:01:39,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:01:39,671 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:01:39,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:01:39,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:01:39,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:01:39,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:01:39,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:01:39,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:01:39,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:01:39,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:01:39,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:01:39,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:01:39,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:01:39,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:01:39,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:01:39,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:01:40,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:01:40,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:01:40,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:01:40,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:01:40,094 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:01:40,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-11-06 23:01:40,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543be636a/24a24b37973b4e99b8f6fedc4f28b041/FLAGa189a8987 [2020-11-06 23:01:41,243 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:01:41,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-11-06 23:01:41,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543be636a/24a24b37973b4e99b8f6fedc4f28b041/FLAGa189a8987 [2020-11-06 23:01:41,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543be636a/24a24b37973b4e99b8f6fedc4f28b041 [2020-11-06 23:01:41,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:01:41,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:01:41,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:41,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:01:41,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:01:41,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:41" (1/1) ... [2020-11-06 23:01:41,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82e663d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:41, skipping insertion in model container [2020-11-06 23:01:41,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:41" (1/1) ... [2020-11-06 23:01:41,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:01:41,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:01:44,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:44,124 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:01:45,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:45,589 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:01:45,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45 WrapperNode [2020-11-06 23:01:45,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:45,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:01:45,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:01:45,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:01:45,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:01:45,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:01:45,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:01:45,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:01:45,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (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 [2020-11-06 23:01:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:01:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:01:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:01:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:01:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:01:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:01:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:01:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:01:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:01:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:01:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:01:54,648 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:01:54,648 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:01:54,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:54 BoogieIcfgContainer [2020-11-06 23:01:54,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:01:54,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:01:54,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:01:54,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:01:54,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:41" (1/3) ... [2020-11-06 23:01:54,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b1facb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:54, skipping insertion in model container [2020-11-06 23:01:54,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45" (2/3) ... [2020-11-06 23:01:54,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b1facb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:54, skipping insertion in model container [2020-11-06 23:01:54,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:54" (3/3) ... [2020-11-06 23:01:54,669 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-11-06 23:01:54,686 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:01:54,696 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:01:54,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:01:54,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:01:54,758 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:01:54,758 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:01:54,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:01:54,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:01:54,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:01:54,759 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:01:54,759 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:01:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states. [2020-11-06 23:01:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-11-06 23:01:54,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:54,884 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] [2020-11-06 23:01:54,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2058974461, now seen corresponding path program 1 times [2020-11-06 23:01:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:54,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830234315] [2020-11-06 23:01:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:58,531 WARN L194 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:01:58,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:58,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830234315] [2020-11-06 23:01:58,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:58,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:01:58,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326193395] [2020-11-06 23:01:58,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:01:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:01:58,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:58,820 INFO L87 Difference]: Start difference. First operand 2253 states. Second operand 5 states. [2020-11-06 23:02:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:21,145 INFO L93 Difference]: Finished difference Result 3960 states and 6891 transitions. [2020-11-06 23:02:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:02:21,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2020-11-06 23:02:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:21,198 INFO L225 Difference]: With dead ends: 3960 [2020-11-06 23:02:21,198 INFO L226 Difference]: Without dead ends: 2245 [2020-11-06 23:02:21,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 23:02:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-11-06 23:02:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-11-06 23:02:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-11-06 23:02:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3872 transitions. [2020-11-06 23:02:21,372 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3872 transitions. Word has length 291 [2020-11-06 23:02:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:21,374 INFO L481 AbstractCegarLoop]: Abstraction has 2245 states and 3872 transitions. [2020-11-06 23:02:21,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:02:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3872 transitions. [2020-11-06 23:02:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-11-06 23:02:21,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:21,386 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] [2020-11-06 23:02:21,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:02:21,387 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 96496140, now seen corresponding path program 1 times [2020-11-06 23:02:21,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:21,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510365172] [2020-11-06 23:02:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:24,520 WARN L194 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:02:24,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:24,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510365172] [2020-11-06 23:02:24,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:24,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:24,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322875910] [2020-11-06 23:02:24,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:24,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:24,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:24,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:24,762 INFO L87 Difference]: Start difference. First operand 2245 states and 3872 transitions. Second operand 4 states. [2020-11-06 23:02:27,499 WARN L194 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:03:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:03,263 INFO L93 Difference]: Finished difference Result 5464 states and 9359 transitions. [2020-11-06 23:03:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:03,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 350 [2020-11-06 23:03:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:03,288 INFO L225 Difference]: With dead ends: 5464 [2020-11-06 23:03:03,288 INFO L226 Difference]: Without dead ends: 3801 [2020-11-06 23:03:03,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-11-06 23:03:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-11-06 23:03:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-11-06 23:03:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6465 transitions. [2020-11-06 23:03:03,413 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6465 transitions. Word has length 350 [2020-11-06 23:03:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:03,413 INFO L481 AbstractCegarLoop]: Abstraction has 3797 states and 6465 transitions. [2020-11-06 23:03:03,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6465 transitions. [2020-11-06 23:03:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-11-06 23:03:03,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:03,428 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] [2020-11-06 23:03:03,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:03:03,429 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash -892013158, now seen corresponding path program 1 times [2020-11-06 23:03:03,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:03,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066152491] [2020-11-06 23:03:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:06,251 WARN L194 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:03:06,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:06,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066152491] [2020-11-06 23:03:06,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:06,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:06,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731051403] [2020-11-06 23:03:06,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:06,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:06,423 INFO L87 Difference]: Start difference. First operand 3797 states and 6465 transitions. Second operand 4 states. [2020-11-06 23:03:09,246 WARN L194 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:03:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:42,779 INFO L93 Difference]: Finished difference Result 6370 states and 10874 transitions. [2020-11-06 23:03:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:42,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 354 [2020-11-06 23:03:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:42,808 INFO L225 Difference]: With dead ends: 6370 [2020-11-06 23:03:42,808 INFO L226 Difference]: Without dead ends: 4697 [2020-11-06 23:03:42,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4697 states. [2020-11-06 23:03:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4697 to 4693. [2020-11-06 23:03:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2020-11-06 23:03:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 7997 transitions. [2020-11-06 23:03:43,006 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 7997 transitions. Word has length 354 [2020-11-06 23:03:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:43,007 INFO L481 AbstractCegarLoop]: Abstraction has 4693 states and 7997 transitions. [2020-11-06 23:03:43,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 7997 transitions. [2020-11-06 23:03:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-11-06 23:03:43,023 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:43,024 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] [2020-11-06 23:03:43,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:03:43,024 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1214527949, now seen corresponding path program 1 times [2020-11-06 23:03:43,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:43,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630924115] [2020-11-06 23:03:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:45,943 WARN L194 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:03:45,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:46,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630924115] [2020-11-06 23:03:46,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:46,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:46,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852209078] [2020-11-06 23:03:46,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:46,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:46,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:46,089 INFO L87 Difference]: Start difference. First operand 4693 states and 7997 transitions. Second operand 4 states. [2020-11-06 23:03:48,864 WARN L194 SmtUtils]: Spent 2.66 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:04:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:23,412 INFO L93 Difference]: Finished difference Result 12615 states and 21385 transitions. [2020-11-06 23:04:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:23,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 358 [2020-11-06 23:04:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:23,452 INFO L225 Difference]: With dead ends: 12615 [2020-11-06 23:04:23,452 INFO L226 Difference]: Without dead ends: 8527 [2020-11-06 23:04:23,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2020-11-06 23:04:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8523. [2020-11-06 23:04:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8523 states. [2020-11-06 23:04:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 14422 transitions. [2020-11-06 23:04:23,820 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 14422 transitions. Word has length 358 [2020-11-06 23:04:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:23,821 INFO L481 AbstractCegarLoop]: Abstraction has 8523 states and 14422 transitions. [2020-11-06 23:04:23,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 14422 transitions. [2020-11-06 23:04:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-11-06 23:04:23,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:23,844 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] [2020-11-06 23:04:23,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:04:23,845 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash -730403625, now seen corresponding path program 1 times [2020-11-06 23:04:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062771668] [2020-11-06 23:04:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:26,700 WARN L194 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:04:26,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:26,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062771668] [2020-11-06 23:04:26,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:26,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:26,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418342612] [2020-11-06 23:04:26,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:26,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:26,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:26,922 INFO L87 Difference]: Start difference. First operand 8523 states and 14422 transitions. Second operand 4 states. [2020-11-06 23:04:29,768 WARN L194 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:05:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:02,511 INFO L93 Difference]: Finished difference Result 15288 states and 25913 transitions. [2020-11-06 23:05:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:02,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 362 [2020-11-06 23:05:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:02,558 INFO L225 Difference]: With dead ends: 15288 [2020-11-06 23:05:02,558 INFO L226 Difference]: Without dead ends: 11190 [2020-11-06 23:05:02,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2020-11-06 23:05:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11186. [2020-11-06 23:05:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11186 states. [2020-11-06 23:05:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 18932 transitions. [2020-11-06 23:05:02,942 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 18932 transitions. Word has length 362 [2020-11-06 23:05:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:02,943 INFO L481 AbstractCegarLoop]: Abstraction has 11186 states and 18932 transitions. [2020-11-06 23:05:02,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 18932 transitions. [2020-11-06 23:05:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-11-06 23:05:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:02,970 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] [2020-11-06 23:05:02,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:05:02,970 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1484769404, now seen corresponding path program 1 times [2020-11-06 23:05:02,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:02,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183608281] [2020-11-06 23:05:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:05,959 WARN L194 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:05:05,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:06,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183608281] [2020-11-06 23:05:06,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:06,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:06,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692684978] [2020-11-06 23:05:06,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:06,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:06,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:06,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:06,128 INFO L87 Difference]: Start difference. First operand 11186 states and 18932 transitions. Second operand 4 states. [2020-11-06 23:05:08,967 WARN L194 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:05:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:45,833 INFO L93 Difference]: Finished difference Result 31564 states and 53196 transitions. [2020-11-06 23:05:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:45,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 366 [2020-11-06 23:05:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:45,892 INFO L225 Difference]: With dead ends: 31564 [2020-11-06 23:05:45,892 INFO L226 Difference]: Without dead ends: 21006 [2020-11-06 23:05:45,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21006 states. [2020-11-06 23:05:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21006 to 21002. [2020-11-06 23:05:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2020-11-06 23:05:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 35289 transitions. [2020-11-06 23:05:46,609 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 35289 transitions. Word has length 366 [2020-11-06 23:05:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:46,610 INFO L481 AbstractCegarLoop]: Abstraction has 21002 states and 35289 transitions. [2020-11-06 23:05:46,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 35289 transitions. [2020-11-06 23:05:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-11-06 23:05:46,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:46,658 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] [2020-11-06 23:05:46,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:05:46,658 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:46,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1426007070, now seen corresponding path program 1 times [2020-11-06 23:05:46,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:46,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754254549] [2020-11-06 23:05:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:49,606 WARN L194 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:05:49,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:49,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754254549] [2020-11-06 23:05:49,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:49,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:49,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770222106] [2020-11-06 23:05:49,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:49,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:49,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:49,777 INFO L87 Difference]: Start difference. First operand 21002 states and 35289 transitions. Second operand 4 states. [2020-11-06 23:05:52,739 WARN L194 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:06:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:25,872 INFO L93 Difference]: Finished difference Result 38803 states and 65370 transitions. [2020-11-06 23:06:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:06:25,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 370 [2020-11-06 23:06:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:25,931 INFO L225 Difference]: With dead ends: 38803 [2020-11-06 23:06:25,931 INFO L226 Difference]: Without dead ends: 28235 [2020-11-06 23:06:25,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28235 states. [2020-11-06 23:06:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28235 to 28231. [2020-11-06 23:06:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28231 states. [2020-11-06 23:06:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28231 states to 28231 states and 47447 transitions. [2020-11-06 23:06:26,884 INFO L78 Accepts]: Start accepts. Automaton has 28231 states and 47447 transitions. Word has length 370 [2020-11-06 23:06:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:26,884 INFO L481 AbstractCegarLoop]: Abstraction has 28231 states and 47447 transitions. [2020-11-06 23:06:26,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 28231 states and 47447 transitions. [2020-11-06 23:06:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-11-06 23:06:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:26,932 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] [2020-11-06 23:06:26,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:06:26,933 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1921358165, now seen corresponding path program 1 times [2020-11-06 23:06:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:26,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584110063] [2020-11-06 23:06:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:29,965 WARN L194 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:06:29,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584110063] [2020-11-06 23:06:30,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:30,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:30,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259819385] [2020-11-06 23:06:30,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:30,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:30,142 INFO L87 Difference]: Start difference. First operand 28231 states and 47447 transitions. Second operand 4 states. [2020-11-06 23:06:33,155 WARN L194 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:07:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:09,556 INFO L93 Difference]: Finished difference Result 81223 states and 135941 transitions. [2020-11-06 23:07:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:09,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 374 [2020-11-06 23:07:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:09,689 INFO L225 Difference]: With dead ends: 81223 [2020-11-06 23:07:09,689 INFO L226 Difference]: Without dead ends: 53643 [2020-11-06 23:07:09,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53643 states. [2020-11-06 23:07:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53643 to 53639. [2020-11-06 23:07:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53639 states. [2020-11-06 23:07:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53639 states to 53639 states and 89424 transitions. [2020-11-06 23:07:11,757 INFO L78 Accepts]: Start accepts. Automaton has 53639 states and 89424 transitions. Word has length 374 [2020-11-06 23:07:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:11,758 INFO L481 AbstractCegarLoop]: Abstraction has 53639 states and 89424 transitions. [2020-11-06 23:07:11,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 53639 states and 89424 transitions. [2020-11-06 23:07:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-11-06 23:07:11,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:11,801 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] [2020-11-06 23:07:11,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:07:11,801 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash -353601649, now seen corresponding path program 1 times [2020-11-06 23:07:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:11,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121194179] [2020-11-06 23:07:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:14,891 WARN L194 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:07:14,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:15,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121194179] [2020-11-06 23:07:15,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:15,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:15,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277136491] [2020-11-06 23:07:15,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:15,137 INFO L87 Difference]: Start difference. First operand 53639 states and 89424 transitions. Second operand 4 states. [2020-11-06 23:07:18,162 WARN L194 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:07:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:52,695 INFO L93 Difference]: Finished difference Result 100010 states and 167239 transitions. [2020-11-06 23:07:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:52,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 378 [2020-11-06 23:07:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:52,809 INFO L225 Difference]: With dead ends: 100010 [2020-11-06 23:07:52,810 INFO L226 Difference]: Without dead ends: 72420 [2020-11-06 23:07:52,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72420 states. [2020-11-06 23:07:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72420 to 72416. [2020-11-06 23:07:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72416 states. [2020-11-06 23:07:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72416 states to 72416 states and 120710 transitions. [2020-11-06 23:07:55,086 INFO L78 Accepts]: Start accepts. Automaton has 72416 states and 120710 transitions. Word has length 378 [2020-11-06 23:07:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:55,087 INFO L481 AbstractCegarLoop]: Abstraction has 72416 states and 120710 transitions. [2020-11-06 23:07:55,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 72416 states and 120710 transitions. [2020-11-06 23:07:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-11-06 23:07:55,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:55,163 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] [2020-11-06 23:07:55,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:07:55,163 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:55,164 INFO L82 PathProgramCache]: Analyzing trace with hash 159244540, now seen corresponding path program 1 times [2020-11-06 23:07:55,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:55,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070440545] [2020-11-06 23:07:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:58,156 WARN L194 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:07:58,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:58,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070440545] [2020-11-06 23:07:58,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:58,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693110962] [2020-11-06 23:07:58,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:58,529 INFO L87 Difference]: Start difference. First operand 72416 states and 120710 transitions. Second operand 4 states. [2020-11-06 23:08:01,535 WARN L194 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:08:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:43,930 INFO L93 Difference]: Finished difference Result 209486 states and 347554 transitions. [2020-11-06 23:08:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:43,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 382 [2020-11-06 23:08:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:44,146 INFO L225 Difference]: With dead ends: 209486 [2020-11-06 23:08:44,147 INFO L226 Difference]: Without dead ends: 137744 [2020-11-06 23:08:44,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137744 states. [2020-11-06 23:08:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137744 to 137740. [2020-11-06 23:08:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137740 states. [2020-11-06 23:08:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137740 states to 137740 states and 227423 transitions. [2020-11-06 23:08:48,839 INFO L78 Accepts]: Start accepts. Automaton has 137740 states and 227423 transitions. Word has length 382 [2020-11-06 23:08:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:48,840 INFO L481 AbstractCegarLoop]: Abstraction has 137740 states and 227423 transitions. [2020-11-06 23:08:48,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 137740 states and 227423 transitions. [2020-11-06 23:08:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-11-06 23:08:48,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:48,941 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] [2020-11-06 23:08:48,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:08:48,941 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:48,942 INFO L82 PathProgramCache]: Analyzing trace with hash 776459818, now seen corresponding path program 1 times [2020-11-06 23:08:48,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:48,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350482115] [2020-11-06 23:08:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:52,282 WARN L194 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:08:52,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:52,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350482115] [2020-11-06 23:08:52,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:52,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:52,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865474892] [2020-11-06 23:08:52,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:52,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:52,500 INFO L87 Difference]: Start difference. First operand 137740 states and 227423 transitions. Second operand 4 states. [2020-11-06 23:08:55,511 WARN L194 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:09:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:36,867 INFO L93 Difference]: Finished difference Result 256489 states and 424824 transitions. [2020-11-06 23:09:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:09:36,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 386 [2020-11-06 23:09:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:37,134 INFO L225 Difference]: With dead ends: 256489 [2020-11-06 23:09:37,135 INFO L226 Difference]: Without dead ends: 184737 [2020-11-06 23:09:37,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184737 states. [2020-11-06 23:09:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184737 to 184733. [2020-11-06 23:09:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184733 states. [2020-11-06 23:09:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184733 states to 184733 states and 304689 transitions. [2020-11-06 23:09:43,755 INFO L78 Accepts]: Start accepts. Automaton has 184733 states and 304689 transitions. Word has length 386 [2020-11-06 23:09:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:43,756 INFO L481 AbstractCegarLoop]: Abstraction has 184733 states and 304689 transitions. [2020-11-06 23:09:43,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:09:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 184733 states and 304689 transitions. [2020-11-06 23:09:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-11-06 23:09:44,169 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:44,169 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] [2020-11-06 23:09:44,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:09:44,170 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1698618589, now seen corresponding path program 1 times [2020-11-06 23:09:44,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:44,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112542305] [2020-11-06 23:09:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:47,708 WARN L194 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:09:47,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:47,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112542305] [2020-11-06 23:09:47,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:47,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 23:09:47,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77863196] [2020-11-06 23:09:47,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 23:09:47,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:47,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 23:09:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-06 23:09:47,931 INFO L87 Difference]: Start difference. First operand 184733 states and 304689 transitions. Second operand 8 states. [2020-11-06 23:09:51,169 WARN L194 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 432 [2020-11-06 23:11:23,936 WARN L194 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 426 [2020-11-06 23:11:27,005 WARN L194 SmtUtils]: Spent 2.93 s on a formula simplification that was a NOOP. DAG size: 427 [2020-11-06 23:11:30,234 WARN L194 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 428 [2020-11-06 23:11:33,476 WARN L194 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:11:42,130 WARN L194 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 429 [2020-11-06 23:11:45,408 WARN L194 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:12:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:12:06,340 INFO L93 Difference]: Finished difference Result 1193777 states and 1977342 transitions. [2020-11-06 23:12:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 23:12:06,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 390 [2020-11-06 23:12:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:12:08,885 INFO L225 Difference]: With dead ends: 1193777 [2020-11-06 23:12:08,885 INFO L226 Difference]: Without dead ends: 1009721 [2020-11-06 23:12:09,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-11-06 23:12:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009721 states. [2020-11-06 23:12:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009721 to 520028. [2020-11-06 23:12:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520028 states. [2020-11-06 23:12:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520028 states to 520028 states and 856981 transitions. [2020-11-06 23:12:42,756 INFO L78 Accepts]: Start accepts. Automaton has 520028 states and 856981 transitions. Word has length 390 [2020-11-06 23:12:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:12:42,770 INFO L481 AbstractCegarLoop]: Abstraction has 520028 states and 856981 transitions. [2020-11-06 23:12:42,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 23:12:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 520028 states and 856981 transitions. [2020-11-06 23:12:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-11-06 23:12:43,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:12:43,180 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] [2020-11-06 23:12:43,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:12:43,181 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:12:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:12:43,187 INFO L82 PathProgramCache]: Analyzing trace with hash 116823781, now seen corresponding path program 1 times [2020-11-06 23:12:43,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:12:43,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055799757] [2020-11-06 23:12:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:12:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:46,618 WARN L194 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 424 [2020-11-06 23:12:46,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:12:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:12:46,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055799757] [2020-11-06 23:12:46,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:12:46,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:12:46,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320667314] [2020-11-06 23:12:46,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:12:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:12:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:12:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:12:46,813 INFO L87 Difference]: Start difference. First operand 520028 states and 856981 transitions. Second operand 5 states. [2020-11-06 23:12:49,615 WARN L194 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 427