/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:19:25,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:19:25,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:19:25,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:19:25,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:19:25,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:19:25,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:19:25,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:19:25,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:19:25,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:19:25,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:19:25,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:19:25,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:19:25,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:19:25,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:19:25,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:19:25,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:19:25,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:19:25,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:19:25,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:19:25,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:19:25,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:19:25,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:19:25,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:19:25,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:19:25,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:19:25,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:19:25,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:19:25,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:19:25,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:19:25,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:19:25,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:19:25,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:19:25,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:19:25,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:19:25,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:19:25,977 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 [2020-07-17 12:19:26,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:19:26,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:19:26,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:19:26,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:19:26,003 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:19:26,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:19:26,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:19:26,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:19:26,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:19:26,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:19:26,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:19:26,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:19:26,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:19:26,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:19:26,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:19:26,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:19:26,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:19:26,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:19:26,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:19:26,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:19:26,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:19:26,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:19:26,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:19:26,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:19:26,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:19:26,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:19:26,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:19:26,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:19:26,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:19:26,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:19:26,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:19:26,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:19:26,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:19:26,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:19:26,283 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:19:26,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-17 12:19:26,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3823ce1cd/3dd4476877344130942bf204b21c1abf/FLAGda55adee7 [2020-07-17 12:19:27,039 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:19:27,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-17 12:19:27,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3823ce1cd/3dd4476877344130942bf204b21c1abf/FLAGda55adee7 [2020-07-17 12:19:27,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3823ce1cd/3dd4476877344130942bf204b21c1abf [2020-07-17 12:19:27,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:19:27,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:19:27,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:19:27,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:19:27,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:19:27,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:19:27" (1/1) ... [2020-07-17 12:19:27,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfb2288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:27, skipping insertion in model container [2020-07-17 12:19:27,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:19:27" (1/1) ... [2020-07-17 12:19:27,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:19:27,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:19:28,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:19:28,752 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:19:30,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:19:30,107 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:19:30,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30 WrapperNode [2020-07-17 12:19:30,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:19:30,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:19:30,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:19:30,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:19:30,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (1/1) ... [2020-07-17 12:19:30,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:19:30,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:19:30,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:19:30,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:19:30,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (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 [2020-07-17 12:19:30,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:19:30,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:19:30,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:19:30,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:19:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:19:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-17 12:19:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:19:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-17 12:19:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:19:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:19:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-17 12:19:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-17 12:19:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-17 12:19:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-17 12:19:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-17 12:19:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-17 12:19:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-17 12:19:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 12:19:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-17 12:19:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:19:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:19:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:19:34,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:19:34,474 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:19:34,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:19:34 BoogieIcfgContainer [2020-07-17 12:19:34,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:19:34,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:19:34,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:19:34,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:19:34,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:19:27" (1/3) ... [2020-07-17 12:19:34,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e0a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:19:34, skipping insertion in model container [2020-07-17 12:19:34,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:19:30" (2/3) ... [2020-07-17 12:19:34,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e0a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:19:34, skipping insertion in model container [2020-07-17 12:19:34,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:19:34" (3/3) ... [2020-07-17 12:19:34,494 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-17 12:19:34,506 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:19:34,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:19:34,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:19:34,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:19:34,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:19:34,560 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:19:34,561 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:19:34,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:19:34,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:19:34,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:19:34,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:19:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-17 12:19:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-17 12:19:34,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:34,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:34,650 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-17 12:19:34,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:34,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471989061] [2020-07-17 12:19:34,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,083 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:19:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:19:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471989061] [2020-07-17 12:19:37,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:19:37,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:19:37,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091817026] [2020-07-17 12:19:37,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:19:37,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:19:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:19:37,365 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-07-17 12:19:38,180 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 389 [2020-07-17 12:19:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:19:47,523 INFO L93 Difference]: Finished difference Result 2212 states and 3947 transitions. [2020-07-17 12:19:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:19:47,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-17 12:19:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:19:47,560 INFO L225 Difference]: With dead ends: 2212 [2020-07-17 12:19:47,561 INFO L226 Difference]: Without dead ends: 1956 [2020-07-17 12:19:47,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:19:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-07-17 12:19:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1954. [2020-07-17 12:19:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2020-07-17 12:19:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3183 transitions. [2020-07-17 12:19:47,748 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3183 transitions. Word has length 467 [2020-07-17 12:19:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:19:47,753 INFO L479 AbstractCegarLoop]: Abstraction has 1954 states and 3183 transitions. [2020-07-17 12:19:47,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:19:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3183 transitions. [2020-07-17 12:19:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-17 12:19:47,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:19:47,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:19:47,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:19:47,771 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:19:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:19:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-07-17 12:19:47,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:19:47,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014962844] [2020-07-17 12:19:47,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:19:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:50,558 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:19:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:19:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:19:50,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014962844] [2020-07-17 12:19:50,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:19:50,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:19:50,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260786335] [2020-07-17 12:19:50,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:19:50,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:19:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:19:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:19:50,901 INFO L87 Difference]: Start difference. First operand 1954 states and 3183 transitions. Second operand 5 states. [2020-07-17 12:20:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:05,327 INFO L93 Difference]: Finished difference Result 5793 states and 9438 transitions. [2020-07-17 12:20:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:20:05,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2020-07-17 12:20:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:05,378 INFO L225 Difference]: With dead ends: 5793 [2020-07-17 12:20:05,378 INFO L226 Difference]: Without dead ends: 3856 [2020-07-17 12:20:05,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:20:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2020-07-17 12:20:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 3854. [2020-07-17 12:20:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3854 states. [2020-07-17 12:20:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6254 transitions. [2020-07-17 12:20:05,551 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6254 transitions. Word has length 467 [2020-07-17 12:20:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:05,553 INFO L479 AbstractCegarLoop]: Abstraction has 3854 states and 6254 transitions. [2020-07-17 12:20:05,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:20:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6254 transitions. [2020-07-17 12:20:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-17 12:20:05,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:05,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:05,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:20:05,571 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:05,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-07-17 12:20:05,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:05,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294586464] [2020-07-17 12:20:05,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:07,197 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:20:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:20:07,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294586464] [2020-07-17 12:20:07,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:20:07,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:20:07,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749747121] [2020-07-17 12:20:07,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:20:07,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:07,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:20:07,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:20:07,805 INFO L87 Difference]: Start difference. First operand 3854 states and 6254 transitions. Second operand 4 states. [2020-07-17 12:20:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:24,027 INFO L93 Difference]: Finished difference Result 11260 states and 18231 transitions. [2020-07-17 12:20:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:20:24,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-07-17 12:20:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:24,067 INFO L225 Difference]: With dead ends: 11260 [2020-07-17 12:20:24,067 INFO L226 Difference]: Without dead ends: 7620 [2020-07-17 12:20:24,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:20:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2020-07-17 12:20:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 7618. [2020-07-17 12:20:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2020-07-17 12:20:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 12321 transitions. [2020-07-17 12:20:24,362 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 12321 transitions. Word has length 469 [2020-07-17 12:20:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:24,362 INFO L479 AbstractCegarLoop]: Abstraction has 7618 states and 12321 transitions. [2020-07-17 12:20:24,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:20:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 12321 transitions. [2020-07-17 12:20:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-17 12:20:24,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:24,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:24,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:20:24,388 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-07-17 12:20:24,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:24,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732622053] [2020-07-17 12:20:24,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:25,330 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:20:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:20:25,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732622053] [2020-07-17 12:20:25,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:20:25,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:20:25,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481818472] [2020-07-17 12:20:25,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:20:25,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:20:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:20:25,625 INFO L87 Difference]: Start difference. First operand 7618 states and 12321 transitions. Second operand 4 states. [2020-07-17 12:20:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:20:41,920 INFO L93 Difference]: Finished difference Result 22757 states and 36795 transitions. [2020-07-17 12:20:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:20:41,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-17 12:20:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:20:41,982 INFO L225 Difference]: With dead ends: 22757 [2020-07-17 12:20:41,982 INFO L226 Difference]: Without dead ends: 15191 [2020-07-17 12:20:41,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:20:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2020-07-17 12:20:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 7665. [2020-07-17 12:20:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2020-07-17 12:20:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 12395 transitions. [2020-07-17 12:20:42,380 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 12395 transitions. Word has length 470 [2020-07-17 12:20:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:20:42,381 INFO L479 AbstractCegarLoop]: Abstraction has 7665 states and 12395 transitions. [2020-07-17 12:20:42,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:20:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 12395 transitions. [2020-07-17 12:20:42,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-17 12:20:42,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:20:42,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:20:42,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:20:42,405 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:20:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:20:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-07-17 12:20:42,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:20:42,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928344401] [2020-07-17 12:20:42,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:20:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:43,574 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:20:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:20:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:20:43,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928344401] [2020-07-17 12:20:43,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:20:43,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:20:43,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83551154] [2020-07-17 12:20:43,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:20:43,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:20:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:20:43,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:20:43,850 INFO L87 Difference]: Start difference. First operand 7665 states and 12395 transitions. Second operand 4 states. [2020-07-17 12:21:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:21:00,103 INFO L93 Difference]: Finished difference Result 22272 states and 35912 transitions. [2020-07-17 12:21:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:21:00,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-07-17 12:21:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:21:00,135 INFO L225 Difference]: With dead ends: 22272 [2020-07-17 12:21:00,135 INFO L226 Difference]: Without dead ends: 15006 [2020-07-17 12:21:00,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:21:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15006 states. [2020-07-17 12:21:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15006 to 15004. [2020-07-17 12:21:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-07-17 12:21:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 24145 transitions. [2020-07-17 12:21:00,931 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 24145 transitions. Word has length 471 [2020-07-17 12:21:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:21:00,932 INFO L479 AbstractCegarLoop]: Abstraction has 15004 states and 24145 transitions. [2020-07-17 12:21:00,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:21:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 24145 transitions. [2020-07-17 12:21:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-17 12:21:00,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:21:00,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:21:00,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:21:00,966 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:21:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:21:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-07-17 12:21:00,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:21:00,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002229368] [2020-07-17 12:21:00,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:21:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:01,867 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:21:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:21:02,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002229368] [2020-07-17 12:21:02,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:21:02,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:21:02,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864370511] [2020-07-17 12:21:02,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:21:02,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:02,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:21:02,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:21:02,040 INFO L87 Difference]: Start difference. First operand 15004 states and 24145 transitions. Second operand 4 states. [2020-07-17 12:21:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:21:19,224 INFO L93 Difference]: Finished difference Result 44756 states and 71990 transitions. [2020-07-17 12:21:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:21:19,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-07-17 12:21:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:21:19,287 INFO L225 Difference]: With dead ends: 44756 [2020-07-17 12:21:19,287 INFO L226 Difference]: Without dead ends: 29896 [2020-07-17 12:21:19,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:21:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-07-17 12:21:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 15102. [2020-07-17 12:21:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15102 states. [2020-07-17 12:21:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15102 states to 15102 states and 24296 transitions. [2020-07-17 12:21:20,190 INFO L78 Accepts]: Start accepts. Automaton has 15102 states and 24296 transitions. Word has length 471 [2020-07-17 12:21:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:21:20,190 INFO L479 AbstractCegarLoop]: Abstraction has 15102 states and 24296 transitions. [2020-07-17 12:21:20,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:21:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 15102 states and 24296 transitions. [2020-07-17 12:21:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-17 12:21:20,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:21:20,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:21:20,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:21:20,222 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:21:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:21:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2067493155, now seen corresponding path program 1 times [2020-07-17 12:21:20,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:21:20,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820662381] [2020-07-17 12:21:20,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:21:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:21,123 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:21:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:21:21,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820662381] [2020-07-17 12:21:21,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:21:21,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:21:21,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555675938] [2020-07-17 12:21:21,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:21:21,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:21:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:21:21,311 INFO L87 Difference]: Start difference. First operand 15102 states and 24296 transitions. Second operand 4 states. [2020-07-17 12:21:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:21:39,284 INFO L93 Difference]: Finished difference Result 44891 states and 72171 transitions. [2020-07-17 12:21:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:21:39,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-17 12:21:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:21:39,342 INFO L225 Difference]: With dead ends: 44891 [2020-07-17 12:21:39,343 INFO L226 Difference]: Without dead ends: 30013 [2020-07-17 12:21:39,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:21:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30013 states. [2020-07-17 12:21:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30013 to 15219. [2020-07-17 12:21:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15219 states. [2020-07-17 12:21:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 24442 transitions. [2020-07-17 12:21:40,170 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 24442 transitions. Word has length 472 [2020-07-17 12:21:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:21:40,171 INFO L479 AbstractCegarLoop]: Abstraction has 15219 states and 24442 transitions. [2020-07-17 12:21:40,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:21:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 24442 transitions. [2020-07-17 12:21:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-17 12:21:40,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:21:40,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:21:40,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:21:40,199 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:21:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:21:40,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-07-17 12:21:40,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:21:40,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664327069] [2020-07-17 12:21:40,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:21:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:41,471 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:21:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:21:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:21:41,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664327069] [2020-07-17 12:21:41,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:21:41,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:21:41,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41479191] [2020-07-17 12:21:41,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:21:41,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:21:41,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:21:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:21:41,849 INFO L87 Difference]: Start difference. First operand 15219 states and 24442 transitions. Second operand 4 states. [2020-07-17 12:22:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:00,169 INFO L93 Difference]: Finished difference Result 43846 states and 70265 transitions. [2020-07-17 12:22:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:22:00,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-17 12:22:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:00,206 INFO L225 Difference]: With dead ends: 43846 [2020-07-17 12:22:00,206 INFO L226 Difference]: Without dead ends: 29596 [2020-07-17 12:22:00,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29596 states. [2020-07-17 12:22:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29596 to 29594. [2020-07-17 12:22:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29594 states. [2020-07-17 12:22:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29594 states to 29594 states and 47307 transitions. [2020-07-17 12:22:01,283 INFO L78 Accepts]: Start accepts. Automaton has 29594 states and 47307 transitions. Word has length 473 [2020-07-17 12:22:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:01,284 INFO L479 AbstractCegarLoop]: Abstraction has 29594 states and 47307 transitions. [2020-07-17 12:22:01,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29594 states and 47307 transitions. [2020-07-17 12:22:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-17 12:22:01,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:01,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:01,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:22:01,310 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:01,310 INFO L82 PathProgramCache]: Analyzing trace with hash -382866648, now seen corresponding path program 1 times [2020-07-17 12:22:01,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:01,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845450094] [2020-07-17 12:22:01,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:03,301 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:22:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:03,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845450094] [2020-07-17 12:22:03,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:03,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:22:03,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856492602] [2020-07-17 12:22:03,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:22:03,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:22:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:03,463 INFO L87 Difference]: Start difference. First operand 29594 states and 47307 transitions. Second operand 5 states. [2020-07-17 12:22:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:18,943 INFO L93 Difference]: Finished difference Result 66734 states and 107426 transitions. [2020-07-17 12:22:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:18,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-07-17 12:22:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:18,981 INFO L225 Difference]: With dead ends: 66734 [2020-07-17 12:22:18,981 INFO L226 Difference]: Without dead ends: 33950 [2020-07-17 12:22:19,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:22:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33950 states. [2020-07-17 12:22:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33950 to 33948. [2020-07-17 12:22:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33948 states. [2020-07-17 12:22:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 54478 transitions. [2020-07-17 12:22:20,317 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 54478 transitions. Word has length 473 [2020-07-17 12:22:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:20,318 INFO L479 AbstractCegarLoop]: Abstraction has 33948 states and 54478 transitions. [2020-07-17 12:22:20,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:22:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 54478 transitions. [2020-07-17 12:22:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-17 12:22:20,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:20,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:20,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:22:20,356 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:20,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1863306290, now seen corresponding path program 1 times [2020-07-17 12:22:20,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:20,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642548331] [2020-07-17 12:22:20,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:21,745 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:22:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:22,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642548331] [2020-07-17 12:22:22,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:22,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:22,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309407288] [2020-07-17 12:22:22,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:22,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:22,037 INFO L87 Difference]: Start difference. First operand 33948 states and 54478 transitions. Second operand 4 states. [2020-07-17 12:22:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:43,089 INFO L93 Difference]: Finished difference Result 99741 states and 160081 transitions. [2020-07-17 12:22:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:22:43,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-07-17 12:22:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:43,157 INFO L225 Difference]: With dead ends: 99741 [2020-07-17 12:22:43,157 INFO L226 Difference]: Without dead ends: 66813 [2020-07-17 12:22:43,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66813 states. [2020-07-17 12:22:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66813 to 66811. [2020-07-17 12:22:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66811 states. [2020-07-17 12:22:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66811 states to 66811 states and 106807 transitions. [2020-07-17 12:22:45,745 INFO L78 Accepts]: Start accepts. Automaton has 66811 states and 106807 transitions. Word has length 475 [2020-07-17 12:22:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:45,746 INFO L479 AbstractCegarLoop]: Abstraction has 66811 states and 106807 transitions. [2020-07-17 12:22:45,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 66811 states and 106807 transitions. [2020-07-17 12:22:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-17 12:22:45,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:45,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:45,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:22:45,831 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:45,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2006098379, now seen corresponding path program 1 times [2020-07-17 12:22:45,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:45,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547081223] [2020-07-17 12:22:45,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:47,064 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:22:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:47,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547081223] [2020-07-17 12:22:47,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:47,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:47,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146179676] [2020-07-17 12:22:47,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:47,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:47,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:47,194 INFO L87 Difference]: Start difference. First operand 66811 states and 106807 transitions. Second operand 4 states. [2020-07-17 12:23:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:02,451 INFO L93 Difference]: Finished difference Result 195685 states and 312451 transitions. [2020-07-17 12:23:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:02,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-17 12:23:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:02,583 INFO L225 Difference]: With dead ends: 195685 [2020-07-17 12:23:02,583 INFO L226 Difference]: Without dead ends: 131267 [2020-07-17 12:23:02,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131267 states. [2020-07-17 12:23:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131267 to 67201. [2020-07-17 12:23:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67201 states. [2020-07-17 12:23:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67201 states to 67201 states and 107383 transitions. [2020-07-17 12:23:08,433 INFO L78 Accepts]: Start accepts. Automaton has 67201 states and 107383 transitions. Word has length 476 [2020-07-17 12:23:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:08,434 INFO L479 AbstractCegarLoop]: Abstraction has 67201 states and 107383 transitions. [2020-07-17 12:23:08,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 67201 states and 107383 transitions. [2020-07-17 12:23:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-17 12:23:08,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:08,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:08,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:23:08,481 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1105309677, now seen corresponding path program 1 times [2020-07-17 12:23:08,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:08,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785438260] [2020-07-17 12:23:08,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:09,738 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:23:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:10,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785438260] [2020-07-17 12:23:10,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:10,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:10,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420488392] [2020-07-17 12:23:10,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:10,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:10,170 INFO L87 Difference]: Start difference. First operand 67201 states and 107383 transitions. Second operand 4 states. [2020-07-17 12:23:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:35,620 INFO L93 Difference]: Finished difference Result 196551 states and 313849 transitions. [2020-07-17 12:23:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:35,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-17 12:23:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:35,748 INFO L225 Difference]: With dead ends: 196551 [2020-07-17 12:23:35,748 INFO L226 Difference]: Without dead ends: 132200 [2020-07-17 12:23:35,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132200 states. [2020-07-17 12:23:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132200 to 132198. [2020-07-17 12:23:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132198 states. [2020-07-17 12:23:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132198 states to 132198 states and 210404 transitions. [2020-07-17 12:23:44,000 INFO L78 Accepts]: Start accepts. Automaton has 132198 states and 210404 transitions. Word has length 477 [2020-07-17 12:23:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:44,001 INFO L479 AbstractCegarLoop]: Abstraction has 132198 states and 210404 transitions. [2020-07-17 12:23:44,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 132198 states and 210404 transitions. [2020-07-17 12:23:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-17 12:23:44,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:44,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:44,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:23:44,101 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1693237162, now seen corresponding path program 1 times [2020-07-17 12:23:44,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:44,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230729254] [2020-07-17 12:23:44,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:45,773 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:23:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:45,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230729254] [2020-07-17 12:23:45,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:45,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:23:45,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581635303] [2020-07-17 12:23:45,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:23:45,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:23:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:23:45,921 INFO L87 Difference]: Start difference. First operand 132198 states and 210404 transitions. Second operand 5 states. [2020-07-17 12:24:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:10,755 INFO L93 Difference]: Finished difference Result 308141 states and 493722 transitions. [2020-07-17 12:24:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:24:10,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-07-17 12:24:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:10,936 INFO L225 Difference]: With dead ends: 308141 [2020-07-17 12:24:10,937 INFO L226 Difference]: Without dead ends: 157667 [2020-07-17 12:24:11,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:24:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157667 states. [2020-07-17 12:24:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157667 to 157665. [2020-07-17 12:24:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157665 states. [2020-07-17 12:24:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157665 states to 157665 states and 251972 transitions. [2020-07-17 12:24:22,093 INFO L78 Accepts]: Start accepts. Automaton has 157665 states and 251972 transitions. Word has length 477 [2020-07-17 12:24:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:22,093 INFO L479 AbstractCegarLoop]: Abstraction has 157665 states and 251972 transitions. [2020-07-17 12:24:22,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:24:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 157665 states and 251972 transitions. [2020-07-17 12:24:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-17 12:24:22,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:22,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:22,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:24:22,213 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 355992395, now seen corresponding path program 1 times [2020-07-17 12:24:22,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:22,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023284271] [2020-07-17 12:24:22,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:23,315 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:24:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:23,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023284271] [2020-07-17 12:24:23,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:23,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:24:23,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013669455] [2020-07-17 12:24:23,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:24:23,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:24:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:24:23,518 INFO L87 Difference]: Start difference. First operand 157665 states and 251972 transitions. Second operand 6 states. [2020-07-17 12:24:24,367 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-07-17 12:24:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:47,303 INFO L93 Difference]: Finished difference Result 277613 states and 435206 transitions. [2020-07-17 12:24:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:24:47,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 479 [2020-07-17 12:24:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:47,488 INFO L225 Difference]: With dead ends: 277613 [2020-07-17 12:24:47,488 INFO L226 Difference]: Without dead ends: 190627 [2020-07-17 12:24:47,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:24:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190627 states. [2020-07-17 12:25:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190627 to 190625. [2020-07-17 12:25:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190625 states. [2020-07-17 12:25:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190625 states to 190625 states and 300652 transitions. [2020-07-17 12:25:01,902 INFO L78 Accepts]: Start accepts. Automaton has 190625 states and 300652 transitions. Word has length 479 [2020-07-17 12:25:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:01,903 INFO L479 AbstractCegarLoop]: Abstraction has 190625 states and 300652 transitions. [2020-07-17 12:25:01,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:25:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 190625 states and 300652 transitions. [2020-07-17 12:25:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-17 12:25:02,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:02,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:25:02,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:25:02,054 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1017913424, now seen corresponding path program 1 times [2020-07-17 12:25:02,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:02,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006955613] [2020-07-17 12:25:02,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:04,127 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:25:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:25:04,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006955613] [2020-07-17 12:25:04,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:25:04,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-17 12:25:04,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448850848] [2020-07-17 12:25:04,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 12:25:04,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 12:25:04,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:25:04,854 INFO L87 Difference]: Start difference. First operand 190625 states and 300652 transitions. Second operand 17 states. [2020-07-17 12:25:06,942 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 409 DAG size of output: 407 [2020-07-17 12:25:22,574 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-07-17 12:25:23,818 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-07-17 12:25:30,424 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-17 12:26:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:04,169 INFO L93 Difference]: Finished difference Result 407025 states and 636576 transitions. [2020-07-17 12:26:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-17 12:26:04,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 479 [2020-07-17 12:26:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:04,639 INFO L225 Difference]: With dead ends: 407025 [2020-07-17 12:26:04,640 INFO L226 Difference]: Without dead ends: 370031 [2020-07-17 12:26:04,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 12:26:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370031 states. [2020-07-17 12:26:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370031 to 202977. [2020-07-17 12:26:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202977 states. [2020-07-17 12:26:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202977 states to 202977 states and 318492 transitions. [2020-07-17 12:26:26,857 INFO L78 Accepts]: Start accepts. Automaton has 202977 states and 318492 transitions. Word has length 479 [2020-07-17 12:26:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:26,857 INFO L479 AbstractCegarLoop]: Abstraction has 202977 states and 318492 transitions. [2020-07-17 12:26:26,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 12:26:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 202977 states and 318492 transitions. [2020-07-17 12:26:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-17 12:26:26,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:26,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:26,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:26:26,995 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1908068521, now seen corresponding path program 1 times [2020-07-17 12:26:26,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:26,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258105825] [2020-07-17 12:26:26,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:28,382 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:26:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:28,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258105825] [2020-07-17 12:26:28,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:28,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:26:28,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682589989] [2020-07-17 12:26:28,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:26:28,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:26:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:26:28,606 INFO L87 Difference]: Start difference. First operand 202977 states and 318492 transitions. Second operand 5 states. [2020-07-17 12:27:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:17,032 INFO L93 Difference]: Finished difference Result 593235 states and 930187 transitions. [2020-07-17 12:27:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:27:17,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-17 12:27:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:17,520 INFO L225 Difference]: With dead ends: 593235 [2020-07-17 12:27:17,520 INFO L226 Difference]: Without dead ends: 394460 [2020-07-17 12:27:17,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:27:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394460 states. [2020-07-17 12:27:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394460 to 394458. [2020-07-17 12:27:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394458 states. [2020-07-17 12:27:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394458 states to 394458 states and 616254 transitions. [2020-07-17 12:27:57,185 INFO L78 Accepts]: Start accepts. Automaton has 394458 states and 616254 transitions. Word has length 479 [2020-07-17 12:27:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:57,186 INFO L479 AbstractCegarLoop]: Abstraction has 394458 states and 616254 transitions. [2020-07-17 12:27:57,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:27:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 394458 states and 616254 transitions. [2020-07-17 12:27:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-17 12:27:57,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:57,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:27:57,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:27:57,524 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1487480530, now seen corresponding path program 1 times [2020-07-17 12:27:57,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:57,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239357053] [2020-07-17 12:27:57,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:58,860 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:27:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:59,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239357053] [2020-07-17 12:27:59,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:59,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:27:59,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047466651] [2020-07-17 12:27:59,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:27:59,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:27:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:27:59,043 INFO L87 Difference]: Start difference. First operand 394458 states and 616254 transitions. Second operand 5 states. [2020-07-17 12:29:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:29:03,892 INFO L93 Difference]: Finished difference Result 923607 states and 1450776 transitions. [2020-07-17 12:29:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:29:03,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-17 12:29:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:29:04,474 INFO L225 Difference]: With dead ends: 923607 [2020-07-17 12:29:04,474 INFO L226 Difference]: Without dead ends: 470057 [2020-07-17 12:29:04,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:29:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470057 states. [2020-07-17 12:29:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470057 to 470055. [2020-07-17 12:29:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470055 states. [2020-07-17 12:29:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470055 states to 470055 states and 736633 transitions. [2020-07-17 12:29:55,773 INFO L78 Accepts]: Start accepts. Automaton has 470055 states and 736633 transitions. Word has length 479 [2020-07-17 12:29:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:55,773 INFO L479 AbstractCegarLoop]: Abstraction has 470055 states and 736633 transitions. [2020-07-17 12:29:55,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:29:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 470055 states and 736633 transitions. [2020-07-17 12:29:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-17 12:29:56,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:56,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:29:56,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:29:56,172 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash -920505515, now seen corresponding path program 1 times [2020-07-17 12:29:56,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:56,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291710901] [2020-07-17 12:29:56,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:58,375 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 388 [2020-07-17 12:29:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:29:58,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291710901] [2020-07-17 12:29:58,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:29:58,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:29:58,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141016306] [2020-07-17 12:29:58,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:29:58,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:29:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:29:58,519 INFO L87 Difference]: Start difference. First operand 470055 states and 736633 transitions. Second operand 5 states.