/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_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 17:21:01,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:21:01,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:21:01,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:21:01,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:21:01,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:21:01,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:21:01,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:21:01,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:21:01,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:21:01,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:21:01,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:21:01,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:21:01,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:21:01,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:21:01,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:21:01,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:21:01,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:21:01,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:21:01,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:21:01,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:21:01,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:21:01,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:21:01,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:21:01,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:21:01,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 17:21:01,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 17:21:01,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 17:21:01,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 17:21:01,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 17:21:01,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 17:21:01,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 17:21:01,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 17:21:01,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:21:01,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:21:01,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:21:01,463 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 [2020-08-22 17:21:01,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:21:01,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:21:01,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:21:01,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:21:01,508 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:21:01,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:21:01,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:21:01,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:21:01,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:21:01,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:21:01,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:21:01,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:21:01,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:21:01,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:21:01,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:21:01,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:21:01,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:21:01,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:21:01,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:21:01,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:21:01,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:21:01,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:21:01,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:21:01,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:21:01,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:21:01,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:21:01,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:21:01,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:21:01,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:21:01,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:21:01,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:21:01,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:21:01,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:21:01,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:21:01,832 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:21:01,833 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 17:21:01,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0599c686c/cd0692568c194b8986fb11e8c4dd5f6d/FLAGf9a89aeb7 [2020-08-22 17:21:02,635 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:21:02,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 17:21:02,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0599c686c/cd0692568c194b8986fb11e8c4dd5f6d/FLAGf9a89aeb7 [2020-08-22 17:21:02,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0599c686c/cd0692568c194b8986fb11e8c4dd5f6d [2020-08-22 17:21:02,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:21:02,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:21:02,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:21:02,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:21:02,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:21:02,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:21:02" (1/1) ... [2020-08-22 17:21:02,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a25417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:02, skipping insertion in model container [2020-08-22 17:21:02,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:21:02" (1/1) ... [2020-08-22 17:21:02,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:21:02,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:21:04,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:21:04,620 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:21:05,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:21:05,693 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:21:05,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05 WrapperNode [2020-08-22 17:21:05,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:21:05,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:21:05,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:21:05,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:21:05,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... [2020-08-22 17:21:05,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:21:05,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:21:05,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:21:05,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:21:05,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:21:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:21:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:21:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:21:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:21:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:21:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:21:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 17:21:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:21:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:21:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:21:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:21:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:21:06,013 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:21:06,014 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:21:06,014 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:21:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:21:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:21:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 17:21:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:21:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:21:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:21:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:21:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:21:10,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:21:10,596 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:21:10,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:21:10 BoogieIcfgContainer [2020-08-22 17:21:10,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:21:10,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:21:10,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:21:10,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:21:10,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:21:02" (1/3) ... [2020-08-22 17:21:10,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6560657b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:21:10, skipping insertion in model container [2020-08-22 17:21:10,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:21:05" (2/3) ... [2020-08-22 17:21:10,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6560657b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:21:10, skipping insertion in model container [2020-08-22 17:21:10,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:21:10" (3/3) ... [2020-08-22 17:21:10,617 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 17:21:10,627 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:21:10,636 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 17:21:10,651 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 17:21:10,680 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:21:10,680 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:21:10,680 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:21:10,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:21:10,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:21:10,681 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:21:10,681 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:21:10,681 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:21:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-08-22 17:21:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-22 17:21:10,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:10,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:21:10,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-08-22 17:21:10,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:10,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623947433] [2020-08-22 17:21:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:14,286 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:21:14,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:14,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623947433] [2020-08-22 17:21:14,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:14,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:21:14,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090043669] [2020-08-22 17:21:14,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:21:14,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:21:14,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:21:14,788 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2020-08-22 17:21:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:21:32,334 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-08-22 17:21:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:21:32,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-08-22 17:21:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:21:32,382 INFO L225 Difference]: With dead ends: 4460 [2020-08-22 17:21:32,382 INFO L226 Difference]: Without dead ends: 2963 [2020-08-22 17:21:32,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:21:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-08-22 17:21:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-08-22 17:21:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-08-22 17:21:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-08-22 17:21:32,614 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-08-22 17:21:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:21:32,616 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-08-22 17:21:32,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:21:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-08-22 17:21:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-08-22 17:21:32,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:32,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:21:32,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:21:32,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-08-22 17:21:32,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:32,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209780480] [2020-08-22 17:21:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:34,478 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:21:34,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:35,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209780480] [2020-08-22 17:21:35,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:35,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:21:35,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780338273] [2020-08-22 17:21:35,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:21:35,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:21:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:21:35,259 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2020-08-22 17:21:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:21:55,938 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-08-22 17:21:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:21:55,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-08-22 17:21:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:21:55,976 INFO L225 Difference]: With dead ends: 8439 [2020-08-22 17:21:55,977 INFO L226 Difference]: Without dead ends: 5747 [2020-08-22 17:21:55,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:21:55,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-08-22 17:21:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-08-22 17:21:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-08-22 17:21:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2020-08-22 17:21:56,201 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2020-08-22 17:21:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:21:56,203 INFO L479 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2020-08-22 17:21:56,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:21:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2020-08-22 17:21:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-22 17:21:56,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:56,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:21:56,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:21:56,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times [2020-08-22 17:21:56,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:56,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393635452] [2020-08-22 17:21:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:57,466 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:21:57,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:57,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393635452] [2020-08-22 17:21:57,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:57,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:21:57,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548895469] [2020-08-22 17:21:57,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:21:57,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:21:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:21:57,713 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states. [2020-08-22 17:22:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:22:17,210 INFO L93 Difference]: Finished difference Result 16979 states and 27804 transitions. [2020-08-22 17:22:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:22:17,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-08-22 17:22:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:22:17,262 INFO L225 Difference]: With dead ends: 16979 [2020-08-22 17:22:17,262 INFO L226 Difference]: Without dead ends: 11339 [2020-08-22 17:22:17,274 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 [2020-08-22 17:22:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2020-08-22 17:22:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 5739. [2020-08-22 17:22:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-08-22 17:22:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9398 transitions. [2020-08-22 17:22:17,591 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9398 transitions. Word has length 496 [2020-08-22 17:22:17,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:22:17,592 INFO L479 AbstractCegarLoop]: Abstraction has 5739 states and 9398 transitions. [2020-08-22 17:22:17,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:22:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9398 transitions. [2020-08-22 17:22:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-08-22 17:22:17,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:22:17,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:22:17,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:22:17,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:22:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:22:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1430972427, now seen corresponding path program 1 times [2020-08-22 17:22:17,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:22:17,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867466054] [2020-08-22 17:22:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:22:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:22:19,016 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:22:19,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:22:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:22:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:22:19,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867466054] [2020-08-22 17:22:19,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:22:19,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:22:19,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766134355] [2020-08-22 17:22:19,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:22:19,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:22:19,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:22:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:22:19,344 INFO L87 Difference]: Start difference. First operand 5739 states and 9398 transitions. Second operand 4 states. [2020-08-22 17:22:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:22:39,405 INFO L93 Difference]: Finished difference Result 16541 states and 26991 transitions. [2020-08-22 17:22:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:22:39,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-08-22 17:22:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:22:39,448 INFO L225 Difference]: With dead ends: 16541 [2020-08-22 17:22:39,449 INFO L226 Difference]: Without dead ends: 11201 [2020-08-22 17:22:39,459 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 [2020-08-22 17:22:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2020-08-22 17:22:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2020-08-22 17:22:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-08-22 17:22:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18172 transitions. [2020-08-22 17:22:39,838 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18172 transitions. Word has length 497 [2020-08-22 17:22:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:22:39,839 INFO L479 AbstractCegarLoop]: Abstraction has 11148 states and 18172 transitions. [2020-08-22 17:22:39,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:22:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18172 transitions. [2020-08-22 17:22:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-08-22 17:22:39,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:22:39,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:22:39,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:22:39,872 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:22:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:22:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1060694512, now seen corresponding path program 1 times [2020-08-22 17:22:39,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:22:39,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472062435] [2020-08-22 17:22:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:22:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:22:41,077 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:22:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:22:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:22:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:22:41,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472062435] [2020-08-22 17:22:41,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:22:41,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:22:41,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911634193] [2020-08-22 17:22:41,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:22:41,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:22:41,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:22:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:22:41,362 INFO L87 Difference]: Start difference. First operand 11148 states and 18172 transitions. Second operand 4 states. [2020-08-22 17:23:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:23:02,227 INFO L93 Difference]: Finished difference Result 33188 states and 54071 transitions. [2020-08-22 17:23:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:23:02,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-08-22 17:23:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:23:02,272 INFO L225 Difference]: With dead ends: 33188 [2020-08-22 17:23:02,273 INFO L226 Difference]: Without dead ends: 22184 [2020-08-22 17:23:02,293 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 [2020-08-22 17:23:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22184 states. [2020-08-22 17:23:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22184 to 11246. [2020-08-22 17:23:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2020-08-22 17:23:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18323 transitions. [2020-08-22 17:23:02,817 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18323 transitions. Word has length 497 [2020-08-22 17:23:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:23:02,818 INFO L479 AbstractCegarLoop]: Abstraction has 11246 states and 18323 transitions. [2020-08-22 17:23:02,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:23:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18323 transitions. [2020-08-22 17:23:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-08-22 17:23:02,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:23:02,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:23:02,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:23:02,848 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:23:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:23:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2017069745, now seen corresponding path program 1 times [2020-08-22 17:23:02,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:23:02,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369002898] [2020-08-22 17:23:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:23:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:03,963 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:23:03,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:23:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:23:04,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369002898] [2020-08-22 17:23:04,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:23:04,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:23:04,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239005941] [2020-08-22 17:23:04,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:23:04,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:23:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:23:04,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:23:04,136 INFO L87 Difference]: Start difference. First operand 11246 states and 18323 transitions. Second operand 4 states. [2020-08-22 17:23:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:23:25,401 INFO L93 Difference]: Finished difference Result 33323 states and 54252 transitions. [2020-08-22 17:23:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:23:25,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-08-22 17:23:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:23:25,451 INFO L225 Difference]: With dead ends: 33323 [2020-08-22 17:23:25,451 INFO L226 Difference]: Without dead ends: 22301 [2020-08-22 17:23:25,473 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 [2020-08-22 17:23:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22301 states. [2020-08-22 17:23:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22301 to 11363. [2020-08-22 17:23:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2020-08-22 17:23:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18469 transitions. [2020-08-22 17:23:25,942 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18469 transitions. Word has length 498 [2020-08-22 17:23:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:23:25,943 INFO L479 AbstractCegarLoop]: Abstraction has 11363 states and 18469 transitions. [2020-08-22 17:23:25,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:23:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18469 transitions. [2020-08-22 17:23:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-08-22 17:23:25,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:23:25,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:23:25,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:23:25,963 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:23:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:23:25,964 INFO L82 PathProgramCache]: Analyzing trace with hash -199707613, now seen corresponding path program 1 times [2020-08-22 17:23:25,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:23:25,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115453179] [2020-08-22 17:23:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:23:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:27,394 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:23:27,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:23:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:23:27,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115453179] [2020-08-22 17:23:27,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:23:27,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:23:27,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116805904] [2020-08-22 17:23:27,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:23:27,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:23:27,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:23:27,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:23:27,604 INFO L87 Difference]: Start difference. First operand 11363 states and 18469 transitions. Second operand 4 states. [2020-08-22 17:23:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:23:42,088 INFO L93 Difference]: Finished difference Result 21947 states and 35242 transitions. [2020-08-22 17:23:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:23:42,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-08-22 17:23:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:23:42,112 INFO L225 Difference]: With dead ends: 21947 [2020-08-22 17:23:42,112 INFO L226 Difference]: Without dead ends: 15101 [2020-08-22 17:23:42,124 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 [2020-08-22 17:23:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2020-08-22 17:23:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 12963. [2020-08-22 17:23:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12963 states. [2020-08-22 17:23:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 21117 transitions. [2020-08-22 17:23:42,635 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 21117 transitions. Word has length 499 [2020-08-22 17:23:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:23:42,635 INFO L479 AbstractCegarLoop]: Abstraction has 12963 states and 21117 transitions. [2020-08-22 17:23:42,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:23:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 21117 transitions. [2020-08-22 17:23:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-08-22 17:23:42,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:23:42,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:23:42,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:23:42,650 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:23:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:23:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash 518385210, now seen corresponding path program 1 times [2020-08-22 17:23:42,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:23:42,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326959965] [2020-08-22 17:23:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:23:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:44,170 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:23:44,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:23:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:23:44,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326959965] [2020-08-22 17:23:44,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:23:44,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:23:44,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285534957] [2020-08-22 17:23:44,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:23:44,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:23:44,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:23:44,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:23:44,469 INFO L87 Difference]: Start difference. First operand 12963 states and 21117 transitions. Second operand 4 states. [2020-08-22 17:24:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:24:06,489 INFO L93 Difference]: Finished difference Result 37125 states and 60352 transitions. [2020-08-22 17:24:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:24:06,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-08-22 17:24:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:24:06,519 INFO L225 Difference]: With dead ends: 37125 [2020-08-22 17:24:06,520 INFO L226 Difference]: Without dead ends: 25131 [2020-08-22 17:24:06,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:24:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25131 states. [2020-08-22 17:24:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 25080. [2020-08-22 17:24:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25080 states. [2020-08-22 17:24:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 40686 transitions. [2020-08-22 17:24:07,534 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 40686 transitions. Word has length 499 [2020-08-22 17:24:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:24:07,534 INFO L479 AbstractCegarLoop]: Abstraction has 25080 states and 40686 transitions. [2020-08-22 17:24:07,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:24:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 40686 transitions. [2020-08-22 17:24:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-08-22 17:24:07,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:24:07,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:24:07,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:24:07,565 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:24:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:24:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2080091133, now seen corresponding path program 1 times [2020-08-22 17:24:07,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:24:07,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309586379] [2020-08-22 17:24:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:24:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:24:09,839 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:24:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:24:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:24:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:24:10,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309586379] [2020-08-22 17:24:10,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:24:10,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:24:10,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562274092] [2020-08-22 17:24:10,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:24:10,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:24:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:24:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:24:10,124 INFO L87 Difference]: Start difference. First operand 25080 states and 40686 transitions. Second operand 5 states. [2020-08-22 17:24:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:24:31,246 INFO L93 Difference]: Finished difference Result 57964 states and 94551 transitions. [2020-08-22 17:24:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:24:31,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-08-22 17:24:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:24:31,276 INFO L225 Difference]: With dead ends: 57964 [2020-08-22 17:24:31,277 INFO L226 Difference]: Without dead ends: 29594 [2020-08-22 17:24:31,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:24:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29594 states. [2020-08-22 17:24:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29594 to 29534. [2020-08-22 17:24:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29534 states. [2020-08-22 17:24:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29534 states to 29534 states and 48033 transitions. [2020-08-22 17:24:33,650 INFO L78 Accepts]: Start accepts. Automaton has 29534 states and 48033 transitions. Word has length 499 [2020-08-22 17:24:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:24:33,650 INFO L479 AbstractCegarLoop]: Abstraction has 29534 states and 48033 transitions. [2020-08-22 17:24:33,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:24:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 29534 states and 48033 transitions. [2020-08-22 17:24:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-08-22 17:24:33,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:24:33,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:24:33,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:24:33,671 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:24:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:24:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1245686880, now seen corresponding path program 1 times [2020-08-22 17:24:33,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:24:33,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231752255] [2020-08-22 17:24:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:24:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:24:35,289 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:24:35,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:24:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:24:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:24:35,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231752255] [2020-08-22 17:24:35,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:24:35,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:24:35,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901810119] [2020-08-22 17:24:35,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:24:35,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:24:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:24:35,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:24:35,753 INFO L87 Difference]: Start difference. First operand 29534 states and 48033 transitions. Second operand 4 states. [2020-08-22 17:25:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:25:00,077 INFO L93 Difference]: Finished difference Result 86594 states and 140872 transitions. [2020-08-22 17:25:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:25:00,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-08-22 17:25:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:25:00,161 INFO L225 Difference]: With dead ends: 86594 [2020-08-22 17:25:00,161 INFO L226 Difference]: Without dead ends: 58080 [2020-08-22 17:25:00,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:25:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2020-08-22 17:25:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 58039. [2020-08-22 17:25:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58039 states. [2020-08-22 17:25:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58039 states to 58039 states and 94066 transitions. [2020-08-22 17:25:02,558 INFO L78 Accepts]: Start accepts. Automaton has 58039 states and 94066 transitions. Word has length 501 [2020-08-22 17:25:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:25:02,558 INFO L479 AbstractCegarLoop]: Abstraction has 58039 states and 94066 transitions. [2020-08-22 17:25:02,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:25:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 58039 states and 94066 transitions. [2020-08-22 17:25:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-08-22 17:25:02,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:25:02,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:25:02,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:25:02,889 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:25:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:25:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1992437422, now seen corresponding path program 1 times [2020-08-22 17:25:02,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:25:02,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432110022] [2020-08-22 17:25:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:25:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:04,212 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:25:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:25:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:25:04,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432110022] [2020-08-22 17:25:04,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:25:04,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:25:04,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213036842] [2020-08-22 17:25:04,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:25:04,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:25:04,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:25:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:25:04,377 INFO L87 Difference]: Start difference. First operand 58039 states and 94066 transitions. Second operand 4 states. [2020-08-22 17:25:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:25:22,498 INFO L93 Difference]: Finished difference Result 107199 states and 172119 transitions. [2020-08-22 17:25:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:25:22,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-08-22 17:25:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:25:22,574 INFO L225 Difference]: With dead ends: 107199 [2020-08-22 17:25:22,574 INFO L226 Difference]: Without dead ends: 76137 [2020-08-22 17:25:22,607 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 [2020-08-22 17:25:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76137 states. [2020-08-22 17:25:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76137 to 69303. [2020-08-22 17:25:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69303 states. [2020-08-22 17:25:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69303 states to 69303 states and 112546 transitions. [2020-08-22 17:25:25,457 INFO L78 Accepts]: Start accepts. Automaton has 69303 states and 112546 transitions. Word has length 501 [2020-08-22 17:25:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:25:25,457 INFO L479 AbstractCegarLoop]: Abstraction has 69303 states and 112546 transitions. [2020-08-22 17:25:25,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:25:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 69303 states and 112546 transitions. [2020-08-22 17:25:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-08-22 17:25:25,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:25:25,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:25:25,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:25:25,513 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:25:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:25:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -429274846, now seen corresponding path program 1 times [2020-08-22 17:25:25,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:25:25,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218733748] [2020-08-22 17:25:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:25:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:27,444 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:25:27,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:25:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:25:27,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218733748] [2020-08-22 17:25:27,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:25:27,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:25:27,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812571079] [2020-08-22 17:25:27,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 17:25:27,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:25:27,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 17:25:27,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:25:27,691 INFO L87 Difference]: Start difference. First operand 69303 states and 112546 transitions. Second operand 6 states. [2020-08-22 17:25:28,816 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 406 [2020-08-22 17:25:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:25:44,716 INFO L93 Difference]: Finished difference Result 114173 states and 183662 transitions. [2020-08-22 17:25:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 17:25:44,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 502 [2020-08-22 17:25:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:25:44,791 INFO L225 Difference]: With dead ends: 114173 [2020-08-22 17:25:44,791 INFO L226 Difference]: Without dead ends: 69303 [2020-08-22 17:25:44,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 17:25:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69303 states. [2020-08-22 17:25:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69303 to 69303. [2020-08-22 17:25:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69303 states. [2020-08-22 17:25:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69303 states to 69303 states and 111930 transitions. [2020-08-22 17:25:47,926 INFO L78 Accepts]: Start accepts. Automaton has 69303 states and 111930 transitions. Word has length 502 [2020-08-22 17:25:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:25:47,927 INFO L479 AbstractCegarLoop]: Abstraction has 69303 states and 111930 transitions. [2020-08-22 17:25:47,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 17:25:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 69303 states and 111930 transitions. [2020-08-22 17:25:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-08-22 17:25:47,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:25:47,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:25:47,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:25:47,984 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:25:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:25:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1111657017, now seen corresponding path program 1 times [2020-08-22 17:25:47,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:25:47,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643095486] [2020-08-22 17:25:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:25:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:50,432 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:25:50,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:25:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:25:51,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643095486] [2020-08-22 17:25:51,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:25:51,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:25:51,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879209361] [2020-08-22 17:25:51,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:25:51,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:25:51,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:25:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:25:51,057 INFO L87 Difference]: Start difference. First operand 69303 states and 111930 transitions. Second operand 5 states. [2020-08-22 17:26:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:26:18,733 INFO L93 Difference]: Finished difference Result 202624 states and 327343 transitions. [2020-08-22 17:26:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:26:18,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-08-22 17:26:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:26:18,884 INFO L225 Difference]: With dead ends: 202624 [2020-08-22 17:26:18,884 INFO L226 Difference]: Without dead ends: 134757 [2020-08-22 17:26:18,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:26:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134757 states. [2020-08-22 17:26:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134757 to 134709. [2020-08-22 17:26:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134709 states. [2020-08-22 17:26:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134709 states to 134709 states and 216940 transitions. [2020-08-22 17:26:27,288 INFO L78 Accepts]: Start accepts. Automaton has 134709 states and 216940 transitions. Word has length 502 [2020-08-22 17:26:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:26:27,288 INFO L479 AbstractCegarLoop]: Abstraction has 134709 states and 216940 transitions. [2020-08-22 17:26:27,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:26:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 134709 states and 216940 transitions. [2020-08-22 17:26:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-08-22 17:26:27,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:26:27,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:26:27,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:26:27,364 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:26:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:26:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash -158101499, now seen corresponding path program 1 times [2020-08-22 17:26:27,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:26:27,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667733933] [2020-08-22 17:26:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:26:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:26:28,733 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:26:28,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:26:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:26:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:26:31,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667733933] [2020-08-22 17:26:31,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:26:31,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:26:31,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746580256] [2020-08-22 17:26:31,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:26:31,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:26:31,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:26:31,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:26:31,094 INFO L87 Difference]: Start difference. First operand 134709 states and 216940 transitions. Second operand 4 states. [2020-08-22 17:27:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:27:09,031 INFO L93 Difference]: Finished difference Result 395061 states and 635305 transitions. [2020-08-22 17:27:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:27:09,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-08-22 17:27:09,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:27:09,300 INFO L225 Difference]: With dead ends: 395061 [2020-08-22 17:27:09,300 INFO L226 Difference]: Without dead ends: 265031 [2020-08-22 17:27:09,381 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 [2020-08-22 17:27:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265031 states. [2020-08-22 17:27:30,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265031 to 264992. [2020-08-22 17:27:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264992 states. [2020-08-22 17:27:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264992 states to 264992 states and 425068 transitions. [2020-08-22 17:27:30,745 INFO L78 Accepts]: Start accepts. Automaton has 264992 states and 425068 transitions. Word has length 503 [2020-08-22 17:27:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:27:30,745 INFO L479 AbstractCegarLoop]: Abstraction has 264992 states and 425068 transitions. [2020-08-22 17:27:30,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:27:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 264992 states and 425068 transitions. [2020-08-22 17:27:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-08-22 17:27:30,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:27:30,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:27:30,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:27:30,923 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:27:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:27:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash -898375032, now seen corresponding path program 1 times [2020-08-22 17:27:30,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:27:30,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520105203] [2020-08-22 17:27:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:27:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:27:33,206 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:27:33,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:27:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:27:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:27:33,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520105203] [2020-08-22 17:27:33,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:27:33,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:27:33,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883464540] [2020-08-22 17:27:33,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:27:33,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:27:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:27:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:27:33,432 INFO L87 Difference]: Start difference. First operand 264992 states and 425068 transitions. Second operand 5 states. [2020-08-22 17:28:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:28:13,336 INFO L93 Difference]: Finished difference Result 622857 states and 1002450 transitions. [2020-08-22 17:28:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:28:13,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 503 [2020-08-22 17:28:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:28:13,706 INFO L225 Difference]: With dead ends: 622857 [2020-08-22 17:28:13,707 INFO L226 Difference]: Without dead ends: 314311 [2020-08-22 17:28:13,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:28:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314311 states. [2020-08-22 17:28:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314311 to 314187. [2020-08-22 17:28:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314187 states. [2020-08-22 17:28:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314187 states to 314187 states and 504351 transitions. [2020-08-22 17:28:42,770 INFO L78 Accepts]: Start accepts. Automaton has 314187 states and 504351 transitions. Word has length 503 [2020-08-22 17:28:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:28:42,770 INFO L479 AbstractCegarLoop]: Abstraction has 314187 states and 504351 transitions. [2020-08-22 17:28:42,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:28:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 314187 states and 504351 transitions. [2020-08-22 17:28:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-08-22 17:28:43,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:28:43,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:28:43,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:28:43,526 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:28:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:28:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash -568171736, now seen corresponding path program 1 times [2020-08-22 17:28:43,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:28:43,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918682586] [2020-08-22 17:28:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:28:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:28:44,828 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:28:44,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:28:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:28:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:28:45,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918682586] [2020-08-22 17:28:45,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:28:45,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:28:45,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543775094] [2020-08-22 17:28:45,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:28:45,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:28:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:28:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:28:45,068 INFO L87 Difference]: Start difference. First operand 314187 states and 504351 transitions. Second operand 4 states. [2020-08-22 17:29:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:29:49,892 INFO L93 Difference]: Finished difference Result 911624 states and 1460026 transitions. [2020-08-22 17:29:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:29:49,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-08-22 17:29:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:29:50,625 INFO L225 Difference]: With dead ends: 911624 [2020-08-22 17:29:50,625 INFO L226 Difference]: Without dead ends: 612786 [2020-08-22 17:29:50,814 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 [2020-08-22 17:29:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612786 states. [2020-08-22 17:30:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612786 to 612738. [2020-08-22 17:30:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612738 states. [2020-08-22 17:30:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612738 states to 612738 states and 978553 transitions. [2020-08-22 17:30:42,415 INFO L78 Accepts]: Start accepts. Automaton has 612738 states and 978553 transitions. Word has length 504 [2020-08-22 17:30:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:30:42,415 INFO L479 AbstractCegarLoop]: Abstraction has 612738 states and 978553 transitions. [2020-08-22 17:30:42,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:30:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 612738 states and 978553 transitions. [2020-08-22 17:30:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-08-22 17:30:42,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:30:42,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:30:42,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:30:42,937 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:30:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:30:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2047146202, now seen corresponding path program 1 times [2020-08-22 17:30:42,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:30:42,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492845261] [2020-08-22 17:30:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:30:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:30:44,272 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-22 17:30:44,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:30:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:30:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:30:45,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492845261] [2020-08-22 17:30:45,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:30:45,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:30:45,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023902] [2020-08-22 17:30:45,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:30:45,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:30:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:30:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:30:45,618 INFO L87 Difference]: Start difference. First operand 612738 states and 978553 transitions. Second operand 4 states. [2020-08-22 17:32:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:32:46,322 INFO L93 Difference]: Finished difference Result 1823693 states and 2911535 transitions. [2020-08-22 17:32:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:32:46,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-08-22 17:32:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:32:47,945 INFO L225 Difference]: With dead ends: 1823693 [2020-08-22 17:32:47,945 INFO L226 Difference]: Without dead ends: 1213823 [2020-08-22 17:32:48,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:32:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213823 states.