/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.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:31:26,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:31:26,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:31:26,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:31:26,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:31:26,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:31:26,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:31:26,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:31:26,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:31:26,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:31:26,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:31:26,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:31:26,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:31:26,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:31:26,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:31:26,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:31:26,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:31:26,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:31:26,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:31:26,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:31:26,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:31:26,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:31:26,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:31:26,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:31:26,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:31:26,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:31:26,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:31:26,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:31:26,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:31:26,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:31:26,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:31:26,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:31:26,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:31:26,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:31:26,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:31:26,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:31:26,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:31:26,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:31:26,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:31:26,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:31:26,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:31:26,480 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:31:26,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:31:26,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:31:26,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:31:26,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:31:26,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:31:26,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:31:26,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:31:26,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:31:26,482 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:31:26,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:31:26,483 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:31:26,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:31:26,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:31:26,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:31:26,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:31:26,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:31:26,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:31:26,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:31:26,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:31:26,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:31:26,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:31:26,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:31:26,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:31:26,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:31:26,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:31:26,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:31:26,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:31:26,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:31:26,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:31:26,795 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:31:26,795 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-17 12:31:26,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c39f3d7/3fd2c5e642bd4fc4b27c78e4d4ca8154/FLAG21d3822ce [2020-07-17 12:31:27,577 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:31:27,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-17 12:31:27,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c39f3d7/3fd2c5e642bd4fc4b27c78e4d4ca8154/FLAG21d3822ce [2020-07-17 12:31:27,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c39f3d7/3fd2c5e642bd4fc4b27c78e4d4ca8154 [2020-07-17 12:31:27,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:31:27,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:31:27,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:31:27,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:31:27,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:31:27,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:31:27" (1/1) ... [2020-07-17 12:31:27,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@715cd5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:27, skipping insertion in model container [2020-07-17 12:31:27,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:31:27" (1/1) ... [2020-07-17 12:31:27,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:31:27,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:31:29,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:31:29,427 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:31:30,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:31:30,727 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:31:30,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30 WrapperNode [2020-07-17 12:31:30,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:31:30,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:31:30,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:31:30,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:31:30,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... [2020-07-17 12:31:30,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:31:30,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:31:30,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:31:30,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:31:30,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:31:31,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:31:31,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:31:31,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:31:31,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:31:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:31:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-17 12:31:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:31:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-17 12:31:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:31:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:31:31,056 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-17 12:31:31,056 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-17 12:31:31,056 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-17 12:31:31,057 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-17 12:31:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-17 12:31:31,059 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-17 12:31:31,059 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-17 12:31:31,059 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 12:31:31,059 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-17 12:31:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:31:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:31:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:31:35,367 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:31:35,368 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:31:35,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:31:35 BoogieIcfgContainer [2020-07-17 12:31:35,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:31:35,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:31:35,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:31:35,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:31:35,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:31:27" (1/3) ... [2020-07-17 12:31:35,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3474f122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:31:35, skipping insertion in model container [2020-07-17 12:31:35,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:31:30" (2/3) ... [2020-07-17 12:31:35,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3474f122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:31:35, skipping insertion in model container [2020-07-17 12:31:35,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:31:35" (3/3) ... [2020-07-17 12:31:35,387 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-17 12:31:35,399 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:31:35,409 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:31:35,424 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:31:35,456 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:31:35,456 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:31:35,457 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:31:35,457 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:31:35,457 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:31:35,457 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:31:35,457 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:31:35,457 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:31:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-17 12:31:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-17 12:31:35,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:31:35,539 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] [2020-07-17 12:31:35,540 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:31:35,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:31:35,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-17 12:31:35,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:31:35,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687829637] [2020-07-17 12:31:35,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:31:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:39,472 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:31:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:31:39,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687829637] [2020-07-17 12:31:39,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:31:39,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:31:39,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090475330] [2020-07-17 12:31:39,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:31:39,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:31:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:31:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:31:39,857 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-07-17 12:31:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:31:56,680 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2020-07-17 12:31:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:31:56,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-07-17 12:31:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:31:56,746 INFO L225 Difference]: With dead ends: 4236 [2020-07-17 12:31:56,746 INFO L226 Difference]: Without dead ends: 2814 [2020-07-17 12:31:56,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:31:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-07-17 12:31:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-07-17 12:31:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-07-17 12:31:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2020-07-17 12:31:56,999 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2020-07-17 12:31:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:31:57,001 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2020-07-17 12:31:57,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:31:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2020-07-17 12:31:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-17 12:31:57,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:31:57,015 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] [2020-07-17 12:31:57,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:31:57,015 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:31:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:31:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-07-17 12:31:57,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:31:57,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996912774] [2020-07-17 12:31:57,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:31:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:58,710 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:31:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:31:59,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996912774] [2020-07-17 12:31:59,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:31:59,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:31:59,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710833634] [2020-07-17 12:31:59,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:31:59,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:31:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:31:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:31:59,259 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states. [2020-07-17 12:32:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:32:18,158 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2020-07-17 12:32:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:32:18,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-17 12:32:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:32:18,189 INFO L225 Difference]: With dead ends: 8158 [2020-07-17 12:32:18,190 INFO L226 Difference]: Without dead ends: 5560 [2020-07-17 12:32:18,195 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 [2020-07-17 12:32:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-07-17 12:32:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2020-07-17 12:32:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2020-07-17 12:32:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2020-07-17 12:32:18,394 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2020-07-17 12:32:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:32:18,395 INFO L479 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2020-07-17 12:32:18,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:32:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2020-07-17 12:32:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-17 12:32:18,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:32:18,414 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] [2020-07-17 12:32:18,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:32:18,415 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:32:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:32:18,415 INFO L82 PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times [2020-07-17 12:32:18,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:32:18,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716174242] [2020-07-17 12:32:18,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:32:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:19,441 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:32:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:32:19,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716174242] [2020-07-17 12:32:19,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:32:19,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:32:19,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544402815] [2020-07-17 12:32:19,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:32:19,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:32:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:32:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:19,770 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states. [2020-07-17 12:32:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:32:37,644 INFO L93 Difference]: Finished difference Result 16577 states and 27255 transitions. [2020-07-17 12:32:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:32:37,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-17 12:32:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:32:37,700 INFO L225 Difference]: With dead ends: 16577 [2020-07-17 12:32:37,700 INFO L226 Difference]: Without dead ends: 11071 [2020-07-17 12:32:37,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-07-17 12:32:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605. [2020-07-17 12:32:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-07-17 12:32:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions. [2020-07-17 12:32:38,011 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490 [2020-07-17 12:32:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:32:38,011 INFO L479 AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions. [2020-07-17 12:32:38,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:32:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions. [2020-07-17 12:32:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-17 12:32:38,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:32:38,032 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] [2020-07-17 12:32:38,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:32:38,033 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:32:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:32:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1982115813, now seen corresponding path program 1 times [2020-07-17 12:32:38,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:32:38,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162125365] [2020-07-17 12:32:38,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:32:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:39,169 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:32:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:32:39,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162125365] [2020-07-17 12:32:39,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:32:39,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:32:39,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948375036] [2020-07-17 12:32:39,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:32:39,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:32:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:32:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:39,492 INFO L87 Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states. [2020-07-17 12:32:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:32:57,412 INFO L93 Difference]: Finished difference Result 16140 states and 26444 transitions. [2020-07-17 12:32:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:32:57,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-17 12:32:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:32:57,461 INFO L225 Difference]: With dead ends: 16140 [2020-07-17 12:32:57,461 INFO L226 Difference]: Without dead ends: 10934 [2020-07-17 12:32:57,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2020-07-17 12:32:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10932. [2020-07-17 12:32:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10932 states. [2020-07-17 12:32:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 17885 transitions. [2020-07-17 12:32:57,934 INFO L78 Accepts]: Start accepts. Automaton has 10932 states and 17885 transitions. Word has length 491 [2020-07-17 12:32:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:32:57,935 INFO L479 AbstractCegarLoop]: Abstraction has 10932 states and 17885 transitions. [2020-07-17 12:32:57,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:32:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10932 states and 17885 transitions. [2020-07-17 12:32:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-17 12:32:57,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:32:57,959 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] [2020-07-17 12:32:57,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:32:57,960 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:32:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:32:57,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2002117056, now seen corresponding path program 1 times [2020-07-17 12:32:57,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:32:57,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21299821] [2020-07-17 12:32:57,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:32:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:58,867 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:32:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:32:59,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21299821] [2020-07-17 12:32:59,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:32:59,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:32:59,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4870654] [2020-07-17 12:32:59,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:32:59,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:32:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:32:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:59,014 INFO L87 Difference]: Start difference. First operand 10932 states and 17885 transitions. Second operand 4 states. [2020-07-17 12:33:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:33:18,112 INFO L93 Difference]: Finished difference Result 32540 states and 53210 transitions. [2020-07-17 12:33:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:33:18,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-17 12:33:18,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:33:18,157 INFO L225 Difference]: With dead ends: 32540 [2020-07-17 12:33:18,158 INFO L226 Difference]: Without dead ends: 21752 [2020-07-17 12:33:18,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:33:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2020-07-17 12:33:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11030. [2020-07-17 12:33:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11030 states. [2020-07-17 12:33:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 18036 transitions. [2020-07-17 12:33:18,589 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 18036 transitions. Word has length 491 [2020-07-17 12:33:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:33:18,590 INFO L479 AbstractCegarLoop]: Abstraction has 11030 states and 18036 transitions. [2020-07-17 12:33:18,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:33:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 18036 transitions. [2020-07-17 12:33:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-17 12:33:18,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:33:18,611 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] [2020-07-17 12:33:18,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:33:18,611 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:33:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:33:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1954950484, now seen corresponding path program 1 times [2020-07-17 12:33:18,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:33:18,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456140833] [2020-07-17 12:33:18,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:33:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:33:19,646 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:33:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:33:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:33:19,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456140833] [2020-07-17 12:33:19,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:33:19,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:33:19,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175289638] [2020-07-17 12:33:19,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:33:19,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:33:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:33:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:33:19,864 INFO L87 Difference]: Start difference. First operand 11030 states and 18036 transitions. Second operand 4 states. [2020-07-17 12:33:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:33:39,720 INFO L93 Difference]: Finished difference Result 32675 states and 53391 transitions. [2020-07-17 12:33:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:33:39,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-17 12:33:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:33:39,770 INFO L225 Difference]: With dead ends: 32675 [2020-07-17 12:33:39,770 INFO L226 Difference]: Without dead ends: 21869 [2020-07-17 12:33:39,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:33:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-07-17 12:33:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11147. [2020-07-17 12:33:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11147 states. [2020-07-17 12:33:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 18182 transitions. [2020-07-17 12:33:40,436 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 18182 transitions. Word has length 492 [2020-07-17 12:33:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:33:40,437 INFO L479 AbstractCegarLoop]: Abstraction has 11147 states and 18182 transitions. [2020-07-17 12:33:40,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:33:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 18182 transitions. [2020-07-17 12:33:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-17 12:33:40,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:33:40,457 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] [2020-07-17 12:33:40,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:33:40,457 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:33:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:33:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1783853194, now seen corresponding path program 1 times [2020-07-17 12:33:40,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:33:40,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601062907] [2020-07-17 12:33:40,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:33:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:33:41,742 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:33:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:33:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:33:41,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601062907] [2020-07-17 12:33:41,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:33:41,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:33:41,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051390765] [2020-07-17 12:33:41,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:33:41,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:33:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:33:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:33:41,998 INFO L87 Difference]: Start difference. First operand 11147 states and 18182 transitions. Second operand 4 states. [2020-07-17 12:34:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:34:02,596 INFO L93 Difference]: Finished difference Result 31726 states and 51629 transitions. [2020-07-17 12:34:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:34:02,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-17 12:34:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:34:02,635 INFO L225 Difference]: With dead ends: 31726 [2020-07-17 12:34:02,635 INFO L226 Difference]: Without dead ends: 21548 [2020-07-17 12:34:02,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:34:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2020-07-17 12:34:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546. [2020-07-17 12:34:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21546 states. [2020-07-17 12:34:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 34987 transitions. [2020-07-17 12:34:03,450 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 34987 transitions. Word has length 493 [2020-07-17 12:34:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:34:03,450 INFO L479 AbstractCegarLoop]: Abstraction has 21546 states and 34987 transitions. [2020-07-17 12:34:03,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:34:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 34987 transitions. [2020-07-17 12:34:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-17 12:34:03,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:34:03,697 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] [2020-07-17 12:34:03,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:34:03,698 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:34:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:34:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1122991245, now seen corresponding path program 1 times [2020-07-17 12:34:03,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:34:03,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002250056] [2020-07-17 12:34:03,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:34:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:05,340 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:34:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:34:05,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002250056] [2020-07-17 12:34:05,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:34:05,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:34:05,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14287869] [2020-07-17 12:34:05,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:34:05,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:34:05,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:34:05,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:34:05,567 INFO L87 Difference]: Start difference. First operand 21546 states and 34987 transitions. Second operand 5 states. [2020-07-17 12:34:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:34:22,613 INFO L93 Difference]: Finished difference Result 50854 states and 83138 transitions. [2020-07-17 12:34:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:34:22,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-17 12:34:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:34:22,661 INFO L225 Difference]: With dead ends: 50854 [2020-07-17 12:34:22,661 INFO L226 Difference]: Without dead ends: 26010 [2020-07-17 12:34:22,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:34:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2020-07-17 12:34:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 26008. [2020-07-17 12:34:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26008 states. [2020-07-17 12:34:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 42390 transitions. [2020-07-17 12:34:23,829 INFO L78 Accepts]: Start accepts. Automaton has 26008 states and 42390 transitions. Word has length 493 [2020-07-17 12:34:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:34:23,830 INFO L479 AbstractCegarLoop]: Abstraction has 26008 states and 42390 transitions. [2020-07-17 12:34:23,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:34:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26008 states and 42390 transitions. [2020-07-17 12:34:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-17 12:34:23,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:34:23,855 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] [2020-07-17 12:34:23,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:34:23,855 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:34:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:34:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -979225654, now seen corresponding path program 1 times [2020-07-17 12:34:23,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:34:23,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846632500] [2020-07-17 12:34:23,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:34:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:25,099 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:34:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:34:25,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846632500] [2020-07-17 12:34:25,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:34:25,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:34:25,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204573288] [2020-07-17 12:34:25,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:34:25,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:34:25,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:34:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:34:25,292 INFO L87 Difference]: Start difference. First operand 26008 states and 42390 transitions. Second operand 4 states. [2020-07-17 12:34:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:34:40,094 INFO L93 Difference]: Finished difference Result 46676 states and 75064 transitions. [2020-07-17 12:34:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:34:40,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-17 12:34:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:34:40,144 INFO L225 Difference]: With dead ends: 46676 [2020-07-17 12:34:40,144 INFO L226 Difference]: Without dead ends: 33210 [2020-07-17 12:34:40,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:34:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33210 states. [2020-07-17 12:34:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33210 to 29048. [2020-07-17 12:34:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29048 states. [2020-07-17 12:34:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29048 states to 29048 states and 47370 transitions. [2020-07-17 12:34:41,248 INFO L78 Accepts]: Start accepts. Automaton has 29048 states and 47370 transitions. Word has length 493 [2020-07-17 12:34:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:34:41,249 INFO L479 AbstractCegarLoop]: Abstraction has 29048 states and 47370 transitions. [2020-07-17 12:34:41,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:34:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 29048 states and 47370 transitions. [2020-07-17 12:34:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-17 12:34:41,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:34:41,281 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] [2020-07-17 12:34:41,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:34:41,282 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:34:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:34:41,282 INFO L82 PathProgramCache]: Analyzing trace with hash 175584375, now seen corresponding path program 1 times [2020-07-17 12:34:41,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:34:41,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111283315] [2020-07-17 12:34:41,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:34:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:42,417 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:34:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:34:43,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111283315] [2020-07-17 12:34:43,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:34:43,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:34:43,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119630196] [2020-07-17 12:34:43,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:34:43,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:34:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:34:43,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:34:43,041 INFO L87 Difference]: Start difference. First operand 29048 states and 47370 transitions. Second operand 4 states. [2020-07-17 12:35:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:35:05,908 INFO L93 Difference]: Finished difference Result 85137 states and 138885 transitions. [2020-07-17 12:35:05,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:35:05,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-17 12:35:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:35:05,986 INFO L225 Difference]: With dead ends: 85137 [2020-07-17 12:35:05,986 INFO L226 Difference]: Without dead ends: 57109 [2020-07-17 12:35:06,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:35:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57109 states. [2020-07-17 12:35:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57109 to 57107. [2020-07-17 12:35:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57107 states. [2020-07-17 12:35:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57107 states to 57107 states and 92799 transitions. [2020-07-17 12:35:08,431 INFO L78 Accepts]: Start accepts. Automaton has 57107 states and 92799 transitions. Word has length 495 [2020-07-17 12:35:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:35:08,432 INFO L479 AbstractCegarLoop]: Abstraction has 57107 states and 92799 transitions. [2020-07-17 12:35:08,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:35:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 57107 states and 92799 transitions. [2020-07-17 12:35:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-17 12:35:08,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:35:08,492 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] [2020-07-17 12:35:08,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:35:08,493 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:35:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:35:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times [2020-07-17 12:35:08,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:35:08,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149816191] [2020-07-17 12:35:08,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:35:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:09,585 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:35:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:35:09,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149816191] [2020-07-17 12:35:09,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:35:09,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:35:09,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87319178] [2020-07-17 12:35:09,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:35:09,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:35:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:35:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:35:09,866 INFO L87 Difference]: Start difference. First operand 57107 states and 92799 transitions. Second operand 4 states. [2020-07-17 12:35:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:35:28,768 INFO L93 Difference]: Finished difference Result 104503 states and 168401 transitions. [2020-07-17 12:35:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:35:28,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-17 12:35:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:35:28,846 INFO L225 Difference]: With dead ends: 104503 [2020-07-17 12:35:28,846 INFO L226 Difference]: Without dead ends: 74421 [2020-07-17 12:35:28,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:35:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74421 states. [2020-07-17 12:35:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74421 to 67987. [2020-07-17 12:35:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67987 states. [2020-07-17 12:35:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 110671 transitions. [2020-07-17 12:35:31,615 INFO L78 Accepts]: Start accepts. Automaton has 67987 states and 110671 transitions. Word has length 495 [2020-07-17 12:35:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:35:31,615 INFO L479 AbstractCegarLoop]: Abstraction has 67987 states and 110671 transitions. [2020-07-17 12:35:31,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:35:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 67987 states and 110671 transitions. [2020-07-17 12:35:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-17 12:35:31,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:35:31,655 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] [2020-07-17 12:35:31,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:35:31,655 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:35:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:35:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -925741270, now seen corresponding path program 1 times [2020-07-17 12:35:31,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:35:31,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592337242] [2020-07-17 12:35:31,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:35:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:32,761 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:35:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:35:32,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592337242] [2020-07-17 12:35:32,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:35:32,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:35:32,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955494064] [2020-07-17 12:35:32,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:35:32,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:35:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:35:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:35:32,897 INFO L87 Difference]: Start difference. First operand 67987 states and 110671 transitions. Second operand 4 states. [2020-07-17 12:35:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:35:50,009 INFO L93 Difference]: Finished difference Result 199213 states and 324043 transitions. [2020-07-17 12:35:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:35:50,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-17 12:35:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:35:50,150 INFO L225 Difference]: With dead ends: 199213 [2020-07-17 12:35:50,150 INFO L226 Difference]: Without dead ends: 133619 [2020-07-17 12:35:50,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:35:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133619 states. [2020-07-17 12:35:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133619 to 68377. [2020-07-17 12:35:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68377 states. [2020-07-17 12:35:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68377 states to 68377 states and 111247 transitions. [2020-07-17 12:35:57,043 INFO L78 Accepts]: Start accepts. Automaton has 68377 states and 111247 transitions. Word has length 496 [2020-07-17 12:35:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:35:57,043 INFO L479 AbstractCegarLoop]: Abstraction has 68377 states and 111247 transitions. [2020-07-17 12:35:57,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:35:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 68377 states and 111247 transitions. [2020-07-17 12:35:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-17 12:35:57,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:35:57,087 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] [2020-07-17 12:35:57,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:35:57,088 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:35:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:35:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1131533936, now seen corresponding path program 1 times [2020-07-17 12:35:57,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:35:57,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000552658] [2020-07-17 12:35:57,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:35:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:58,444 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:35:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:35:58,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000552658] [2020-07-17 12:35:58,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:35:58,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 12:35:58,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023454568] [2020-07-17 12:35:58,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:35:58,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:35:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:35:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:35:58,602 INFO L87 Difference]: Start difference. First operand 68377 states and 111247 transitions. Second operand 10 states. [2020-07-17 12:35:59,515 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-17 12:36:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:36:46,206 INFO L93 Difference]: Finished difference Result 332486 states and 535872 transitions. [2020-07-17 12:36:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 12:36:46,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 496 [2020-07-17 12:36:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:36:46,553 INFO L225 Difference]: With dead ends: 332486 [2020-07-17 12:36:46,553 INFO L226 Difference]: Without dead ends: 289604 [2020-07-17 12:36:46,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 12:36:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289604 states. [2020-07-17 12:36:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289604 to 189071. [2020-07-17 12:36:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189071 states. [2020-07-17 12:36:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189071 states to 189071 states and 301915 transitions. [2020-07-17 12:36:59,972 INFO L78 Accepts]: Start accepts. Automaton has 189071 states and 301915 transitions. Word has length 496 [2020-07-17 12:36:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:36:59,972 INFO L479 AbstractCegarLoop]: Abstraction has 189071 states and 301915 transitions. [2020-07-17 12:36:59,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:36:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 189071 states and 301915 transitions. [2020-07-17 12:37:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-17 12:37:00,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:37:00,052 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] [2020-07-17 12:37:00,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:37:00,053 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:37:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:37:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1627764272, now seen corresponding path program 1 times [2020-07-17 12:37:00,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:37:00,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244417335] [2020-07-17 12:37:00,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:37:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:37:01,419 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:37:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:37:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:37:02,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244417335] [2020-07-17 12:37:02,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:37:02,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 12:37:02,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242940714] [2020-07-17 12:37:02,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:37:02,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:37:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:37:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:37:02,121 INFO L87 Difference]: Start difference. First operand 189071 states and 301915 transitions. Second operand 9 states. [2020-07-17 12:37:03,031 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 408 [2020-07-17 12:37:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:37:30,647 INFO L93 Difference]: Finished difference Result 274695 states and 441151 transitions. [2020-07-17 12:37:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:37:30,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 496 [2020-07-17 12:37:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:37:30,848 INFO L225 Difference]: With dead ends: 274695 [2020-07-17 12:37:30,848 INFO L226 Difference]: Without dead ends: 147327 [2020-07-17 12:37:30,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:37:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147327 states. [2020-07-17 12:37:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147327 to 80321. [2020-07-17 12:37:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80321 states. [2020-07-17 12:37:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80321 states to 80321 states and 128615 transitions. [2020-07-17 12:37:40,657 INFO L78 Accepts]: Start accepts. Automaton has 80321 states and 128615 transitions. Word has length 496 [2020-07-17 12:37:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:37:40,657 INFO L479 AbstractCegarLoop]: Abstraction has 80321 states and 128615 transitions. [2020-07-17 12:37:40,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:37:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 80321 states and 128615 transitions. [2020-07-17 12:37:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-17 12:37:40,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:37:40,706 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] [2020-07-17 12:37:40,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:37:40,706 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:37:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:37:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash 43078897, now seen corresponding path program 1 times [2020-07-17 12:37:40,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:37:40,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485704271] [2020-07-17 12:37:40,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:37:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:37:42,428 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:37:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:37:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:37:42,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485704271] [2020-07-17 12:37:42,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:37:42,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:37:42,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119467452] [2020-07-17 12:37:42,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:37:42,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:37:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:37:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:37:42,871 INFO L87 Difference]: Start difference. First operand 80321 states and 128615 transitions. Second operand 5 states. [2020-07-17 12:38:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:38:11,354 INFO L93 Difference]: Finished difference Result 234928 states and 376112 transitions. [2020-07-17 12:38:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:38:11,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-17 12:38:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:38:11,509 INFO L225 Difference]: With dead ends: 234928 [2020-07-17 12:38:11,509 INFO L226 Difference]: Without dead ends: 156163 [2020-07-17 12:38:11,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:38:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156163 states. [2020-07-17 12:38:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156163 to 156161. [2020-07-17 12:38:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156161 states. [2020-07-17 12:38:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156161 states to 156161 states and 249237 transitions. [2020-07-17 12:38:25,474 INFO L78 Accepts]: Start accepts. Automaton has 156161 states and 249237 transitions. Word has length 496 [2020-07-17 12:38:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:38:25,474 INFO L479 AbstractCegarLoop]: Abstraction has 156161 states and 249237 transitions. [2020-07-17 12:38:25,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:38:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 156161 states and 249237 transitions. [2020-07-17 12:38:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-17 12:38:25,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:38:25,575 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] [2020-07-17 12:38:25,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:38:25,576 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:38:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:38:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash 775267711, now seen corresponding path program 1 times [2020-07-17 12:38:25,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:38:25,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099056304] [2020-07-17 12:38:25,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:38:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:38:27,108 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:38:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:38:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:38:27,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099056304] [2020-07-17 12:38:27,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:38:27,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:38:27,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898079929] [2020-07-17 12:38:27,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:38:27,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:38:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:38:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:38:27,252 INFO L87 Difference]: Start difference. First operand 156161 states and 249237 transitions. Second operand 5 states. [2020-07-17 12:38:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:38:58,439 INFO L93 Difference]: Finished difference Result 358147 states and 573758 transitions. [2020-07-17 12:38:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:38:58,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-07-17 12:38:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:38:58,657 INFO L225 Difference]: With dead ends: 358147 [2020-07-17 12:38:58,657 INFO L226 Difference]: Without dead ends: 181401 [2020-07-17 12:38:58,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:38:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181401 states. [2020-07-17 12:39:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181401 to 181399. [2020-07-17 12:39:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181399 states. [2020-07-17 12:39:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181399 states to 181399 states and 289820 transitions. [2020-07-17 12:39:14,536 INFO L78 Accepts]: Start accepts. Automaton has 181399 states and 289820 transitions. Word has length 497 [2020-07-17 12:39:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:39:14,536 INFO L479 AbstractCegarLoop]: Abstraction has 181399 states and 289820 transitions. [2020-07-17 12:39:14,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:39:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 181399 states and 289820 transitions. [2020-07-17 12:39:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-17 12:39:14,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:39:14,656 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] [2020-07-17 12:39:14,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:39:14,656 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:39:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:39:14,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1196309607, now seen corresponding path program 1 times [2020-07-17 12:39:14,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:39:14,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061838342] [2020-07-17 12:39:14,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:39:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:39:15,812 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:39:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:39:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:39:16,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061838342] [2020-07-17 12:39:16,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:39:16,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:39:16,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372444876] [2020-07-17 12:39:16,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:39:16,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:39:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:39:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:39:16,400 INFO L87 Difference]: Start difference. First operand 181399 states and 289820 transitions. Second operand 4 states. [2020-07-17 12:40:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:40:04,033 INFO L93 Difference]: Finished difference Result 525060 states and 837778 transitions. [2020-07-17 12:40:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:40:04,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-17 12:40:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:40:04,468 INFO L225 Difference]: With dead ends: 525060 [2020-07-17 12:40:04,468 INFO L226 Difference]: Without dead ends: 353508 [2020-07-17 12:40:04,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:40:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353508 states. [2020-07-17 12:40:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353508 to 353506. [2020-07-17 12:40:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353506 states. [2020-07-17 12:40:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353506 states to 353506 states and 562743 transitions. [2020-07-17 12:40:37,589 INFO L78 Accepts]: Start accepts. Automaton has 353506 states and 562743 transitions. Word has length 498 [2020-07-17 12:40:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:40:37,590 INFO L479 AbstractCegarLoop]: Abstraction has 353506 states and 562743 transitions. [2020-07-17 12:40:37,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:40:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 353506 states and 562743 transitions. [2020-07-17 12:40:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-17 12:40:37,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:40:37,819 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] [2020-07-17 12:40:37,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:40:37,819 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:40:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:40:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 532673534, now seen corresponding path program 1 times [2020-07-17 12:40:37,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:40:37,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492447546] [2020-07-17 12:40:37,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:40:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:40:39,372 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:40:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:40:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:40:40,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492447546] [2020-07-17 12:40:40,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:40:40,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:40:40,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626132400] [2020-07-17 12:40:40,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:40:40,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:40:40,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:40:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:40:40,188 INFO L87 Difference]: Start difference. First operand 353506 states and 562743 transitions. Second operand 5 states. [2020-07-17 12:42:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:42:34,488 INFO L93 Difference]: Finished difference Result 1291851 states and 2046826 transitions. [2020-07-17 12:42:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:42:34,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-07-17 12:42:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:42:35,781 INFO L225 Difference]: With dead ends: 1291851 [2020-07-17 12:42:35,781 INFO L226 Difference]: Without dead ends: 959785 [2020-07-17 12:42:36,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:42:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959785 states. [2020-07-17 12:43:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959785 to 364897. [2020-07-17 12:43:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364897 states. [2020-07-17 12:43:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364897 states to 364897 states and 581519 transitions. [2020-07-17 12:43:14,778 INFO L78 Accepts]: Start accepts. Automaton has 364897 states and 581519 transitions. Word has length 499 [2020-07-17 12:43:14,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:43:14,779 INFO L479 AbstractCegarLoop]: Abstraction has 364897 states and 581519 transitions. [2020-07-17 12:43:14,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:43:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 364897 states and 581519 transitions. [2020-07-17 12:43:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-17 12:43:15,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:43:15,029 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] [2020-07-17 12:43:15,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 12:43:15,030 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:43:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:43:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1152099056, now seen corresponding path program 1 times [2020-07-17 12:43:15,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:43:15,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693550481] [2020-07-17 12:43:15,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:43:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:43:16,824 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-17 12:43:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:43:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:43:16,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693550481] [2020-07-17 12:43:16,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:43:16,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:43:16,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129345433] [2020-07-17 12:43:16,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:43:16,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:43:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:43:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:43:16,967 INFO L87 Difference]: Start difference. First operand 364897 states and 581519 transitions. Second operand 4 states.