/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.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 14:00:45,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 14:00:45,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 14:00:45,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 14:00:45,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 14:00:45,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 14:00:45,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 14:00:45,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 14:00:45,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 14:00:45,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 14:00:45,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 14:00:45,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 14:00:45,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 14:00:45,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 14:00:45,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 14:00:45,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 14:00:45,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 14:00:45,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 14:00:45,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 14:00:45,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 14:00:45,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 14:00:45,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 14:00:45,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 14:00:45,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 14:00:45,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 14:00:45,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 14:00:45,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 14:00:45,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 14:00:45,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 14:00:45,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 14:00:45,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 14:00:45,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 14:00:45,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 14:00:45,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 14:00:45,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 14:00:45,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 14:00:45,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 14:00:45,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 14:00:45,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 14:00:45,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 14:00:45,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 14:00:45,436 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 14:00:45,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 14:00:45,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 14:00:45,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 14:00:45,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 14:00:45,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 14:00:45,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 14:00:45,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 14:00:45,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 14:00:45,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 14:00:45,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 14:00:45,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 14:00:45,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 14:00:45,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 14:00:45,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 14:00:45,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 14:00:45,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 14:00:45,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:00:45,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 14:00:45,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 14:00:45,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 14:00:45,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 14:00:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 14:00:45,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 14:00:45,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 14:00:45,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 14:00:45,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 14:00:45,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 14:00:45,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 14:00:45,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 14:00:45,895 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 14:00:45,897 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-04 14:00:45,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87fc31e7d/13101d99f67045bcbda247f70d6ad8d4/FLAGf525c8f06 [2020-09-04 14:00:46,712 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 14:00:46,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-04 14:00:46,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87fc31e7d/13101d99f67045bcbda247f70d6ad8d4/FLAGf525c8f06 [2020-09-04 14:00:46,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87fc31e7d/13101d99f67045bcbda247f70d6ad8d4 [2020-09-04 14:00:46,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 14:00:46,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 14:00:46,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 14:00:46,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 14:00:46,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 14:00:46,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:00:46" (1/1) ... [2020-09-04 14:00:46,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737b2568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:46, skipping insertion in model container [2020-09-04 14:00:46,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:00:46" (1/1) ... [2020-09-04 14:00:46,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 14:00:47,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 14:00:48,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:00:48,240 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 14:00:48,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:00:48,959 INFO L208 MainTranslator]: Completed translation [2020-09-04 14:00:48,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48 WrapperNode [2020-09-04 14:00:48,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 14:00:48,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 14:00:48,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 14:00:48,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 14:00:48,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:48,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:49,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:49,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:49,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:49,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:49,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... [2020-09-04 14:00:49,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 14:00:49,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 14:00:49,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 14:00:49,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 14:00:49,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 14:00:49,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 14:00:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 14:00:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 14:00:49,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 14:00:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 14:00:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 14:00:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 14:00:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 14:00:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 14:00:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 14:00:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 14:00:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 14:00:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 14:00:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 14:00:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 14:00:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 14:00:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 14:00:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 14:00:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 14:00:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 14:00:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 14:00:51,922 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 14:00:51,923 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 14:00:51,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:00:51 BoogieIcfgContainer [2020-09-04 14:00:51,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 14:00:51,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 14:00:51,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 14:00:51,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 14:00:51,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 02:00:46" (1/3) ... [2020-09-04 14:00:51,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474825ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:00:51, skipping insertion in model container [2020-09-04 14:00:51,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:48" (2/3) ... [2020-09-04 14:00:51,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474825ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:00:51, skipping insertion in model container [2020-09-04 14:00:51,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:00:51" (3/3) ... [2020-09-04 14:00:51,944 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-04 14:00:51,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 14:00:51,967 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 14:00:51,992 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 14:00:52,027 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 14:00:52,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 14:00:52,027 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 14:00:52,027 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 14:00:52,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 14:00:52,028 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 14:00:52,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 14:00:52,028 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 14:00:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-09-04 14:00:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-04 14:00:52,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:52,099 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] [2020-09-04 14:00:52,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-09-04 14:00:52,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:52,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787532836] [2020-09-04 14:00:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:54,315 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:00:54,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:54,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787532836] [2020-09-04 14:00:54,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:54,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:00:54,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383603817] [2020-09-04 14:00:54,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:00:54,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:00:54,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:54,655 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-09-04 14:01:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:03,977 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-09-04 14:01:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 14:01:03,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-04 14:01:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:04,014 INFO L225 Difference]: With dead ends: 2333 [2020-09-04 14:01:04,015 INFO L226 Difference]: Without dead ends: 1545 [2020-09-04 14:01:04,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:01:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-04 14:01:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-09-04 14:01:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-04 14:01:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-09-04 14:01:04,204 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-09-04 14:01:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:04,205 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-09-04 14:01:04,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:01:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-09-04 14:01:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-04 14:01:04,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:04,217 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] [2020-09-04 14:01:04,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 14:01:04,218 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-09-04 14:01:04,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:04,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401893705] [2020-09-04 14:01:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:05,266 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:01:05,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:05,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401893705] [2020-09-04 14:01:05,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:05,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:05,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651745497] [2020-09-04 14:01:05,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:05,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:05,625 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-09-04 14:01:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:15,332 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-09-04 14:01:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:15,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-04 14:01:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:15,358 INFO L225 Difference]: With dead ends: 4438 [2020-09-04 14:01:15,358 INFO L226 Difference]: Without dead ends: 3024 [2020-09-04 14:01:15,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-09-04 14:01:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-09-04 14:01:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-04 14:01:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-09-04 14:01:15,528 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-09-04 14:01:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:15,529 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-09-04 14:01:15,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-09-04 14:01:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-04 14:01:15,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:15,540 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] [2020-09-04 14:01:15,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 14:01:15,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-09-04 14:01:15,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:15,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833887354] [2020-09-04 14:01:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:16,415 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:01:16,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:16,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833887354] [2020-09-04 14:01:16,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:16,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:16,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179056273] [2020-09-04 14:01:16,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:16,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:16,603 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-09-04 14:01:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:25,949 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-09-04 14:01:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:25,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-04 14:01:25,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:25,976 INFO L225 Difference]: With dead ends: 8991 [2020-09-04 14:01:25,976 INFO L226 Difference]: Without dead ends: 6011 [2020-09-04 14:01:25,983 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 [2020-09-04 14:01:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-09-04 14:01:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-09-04 14:01:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-09-04 14:01:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-09-04 14:01:26,135 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-09-04 14:01:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:26,135 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-09-04 14:01:26,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-09-04 14:01:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-04 14:01:26,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:26,145 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] [2020-09-04 14:01:26,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 14:01:26,146 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-09-04 14:01:26,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:26,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861025902] [2020-09-04 14:01:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:26,967 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:01:26,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:27,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861025902] [2020-09-04 14:01:27,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:27,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:27,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244807521] [2020-09-04 14:01:27,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:27,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:27,079 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-09-04 14:01:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:36,512 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-09-04 14:01:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:36,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-04 14:01:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:36,537 INFO L225 Difference]: With dead ends: 9010 [2020-09-04 14:01:36,537 INFO L226 Difference]: Without dead ends: 6029 [2020-09-04 14:01:36,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-09-04 14:01:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-09-04 14:01:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-09-04 14:01:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-09-04 14:01:36,698 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-09-04 14:01:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:36,698 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-09-04 14:01:36,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-09-04 14:01:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-04 14:01:36,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:36,710 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] [2020-09-04 14:01:36,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 14:01:36,711 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-09-04 14:01:36,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:36,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656705186] [2020-09-04 14:01:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:37,702 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:01:37,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:37,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656705186] [2020-09-04 14:01:37,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:37,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:37,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205289089] [2020-09-04 14:01:37,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:37,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:37,903 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-09-04 14:01:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:47,124 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-09-04 14:01:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:47,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-09-04 14:01:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:47,145 INFO L225 Difference]: With dead ends: 8718 [2020-09-04 14:01:47,145 INFO L226 Difference]: Without dead ends: 5904 [2020-09-04 14:01:47,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-09-04 14:01:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-09-04 14:01:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-09-04 14:01:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-09-04 14:01:47,396 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-09-04 14:01:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:47,397 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-09-04 14:01:47,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-09-04 14:01:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-04 14:01:47,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:47,445 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] [2020-09-04 14:01:47,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:01:47,445 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-09-04 14:01:47,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:47,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967614643] [2020-09-04 14:01:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:48,669 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:01:48,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967614643] [2020-09-04 14:01:48,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:48,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:48,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654943470] [2020-09-04 14:01:48,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:48,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:48,772 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-09-04 14:01:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:55,386 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-09-04 14:01:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:01:55,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-09-04 14:01:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:55,410 INFO L225 Difference]: With dead ends: 13189 [2020-09-04 14:01:55,410 INFO L226 Difference]: Without dead ends: 6775 [2020-09-04 14:01:55,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:01:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-09-04 14:01:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-09-04 14:01:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-09-04 14:01:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-09-04 14:01:55,715 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-09-04 14:01:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:55,716 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-09-04 14:01:55,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:01:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-09-04 14:01:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:01:55,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:55,731 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] [2020-09-04 14:01:55,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:01:55,732 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:55,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-09-04 14:01:55,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:55,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581498075] [2020-09-04 14:01:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:56,538 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:01:56,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:56,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581498075] [2020-09-04 14:01:56,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:56,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:56,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238066985] [2020-09-04 14:01:56,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:56,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:56,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:56,648 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states. [2020-09-04 14:02:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:02,085 INFO L93 Difference]: Finished difference Result 19447 states and 29573 transitions. [2020-09-04 14:02:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:02,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-04 14:02:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:02,120 INFO L225 Difference]: With dead ends: 19447 [2020-09-04 14:02:02,121 INFO L226 Difference]: Without dead ends: 13127 [2020-09-04 14:02:02,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-09-04 14:02:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 6831. [2020-09-04 14:02:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2020-09-04 14:02:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 10425 transitions. [2020-09-04 14:02:02,558 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 10425 transitions. Word has length 330 [2020-09-04 14:02:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:02,559 INFO L479 AbstractCegarLoop]: Abstraction has 6831 states and 10425 transitions. [2020-09-04 14:02:02,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 10425 transitions. [2020-09-04 14:02:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:02:02,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:02,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:02,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:02:02,572 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:02,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1432284472, now seen corresponding path program 1 times [2020-09-04 14:02:02,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:02,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228005156] [2020-09-04 14:02:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:03,534 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:02:03,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:03,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228005156] [2020-09-04 14:02:03,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:03,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:03,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527543455] [2020-09-04 14:02:03,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:03,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:03,711 INFO L87 Difference]: Start difference. First operand 6831 states and 10425 transitions. Second operand 4 states. [2020-09-04 14:02:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:13,554 INFO L93 Difference]: Finished difference Result 19896 states and 30288 transitions. [2020-09-04 14:02:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:13,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-04 14:02:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:13,580 INFO L225 Difference]: With dead ends: 19896 [2020-09-04 14:02:13,581 INFO L226 Difference]: Without dead ends: 13350 [2020-09-04 14:02:13,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13350 states. [2020-09-04 14:02:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13350 to 13348. [2020-09-04 14:02:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13348 states. [2020-09-04 14:02:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13348 states to 13348 states and 20240 transitions. [2020-09-04 14:02:14,126 INFO L78 Accepts]: Start accepts. Automaton has 13348 states and 20240 transitions. Word has length 330 [2020-09-04 14:02:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:14,127 INFO L479 AbstractCegarLoop]: Abstraction has 13348 states and 20240 transitions. [2020-09-04 14:02:14,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 13348 states and 20240 transitions. [2020-09-04 14:02:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:02:14,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:14,149 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] [2020-09-04 14:02:14,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:02:14,150 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:14,150 INFO L82 PathProgramCache]: Analyzing trace with hash -491858715, now seen corresponding path program 1 times [2020-09-04 14:02:14,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:14,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124197623] [2020-09-04 14:02:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:15,291 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:02:15,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:15,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124197623] [2020-09-04 14:02:15,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:15,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:15,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424420084] [2020-09-04 14:02:15,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:15,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:15,428 INFO L87 Difference]: Start difference. First operand 13348 states and 20240 transitions. Second operand 5 states. [2020-09-04 14:02:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:22,725 INFO L93 Difference]: Finished difference Result 30452 states and 45989 transitions. [2020-09-04 14:02:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:02:22,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-09-04 14:02:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:22,766 INFO L225 Difference]: With dead ends: 30452 [2020-09-04 14:02:22,766 INFO L226 Difference]: Without dead ends: 15894 [2020-09-04 14:02:22,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:02:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2020-09-04 14:02:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 15892. [2020-09-04 14:02:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15892 states. [2020-09-04 14:02:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15892 states to 15892 states and 23961 transitions. [2020-09-04 14:02:23,708 INFO L78 Accepts]: Start accepts. Automaton has 15892 states and 23961 transitions. Word has length 330 [2020-09-04 14:02:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:23,708 INFO L479 AbstractCegarLoop]: Abstraction has 15892 states and 23961 transitions. [2020-09-04 14:02:23,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:02:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 15892 states and 23961 transitions. [2020-09-04 14:02:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:02:23,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:23,732 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] [2020-09-04 14:02:23,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:02:23,733 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:23,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1136318819, now seen corresponding path program 1 times [2020-09-04 14:02:23,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:23,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973104242] [2020-09-04 14:02:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:24,933 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:02:24,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:25,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973104242] [2020-09-04 14:02:25,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:25,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:25,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080135341] [2020-09-04 14:02:25,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:25,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:25,080 INFO L87 Difference]: Start difference. First operand 15892 states and 23961 transitions. Second operand 5 states. [2020-09-04 14:02:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:36,618 INFO L93 Difference]: Finished difference Result 41545 states and 62089 transitions. [2020-09-04 14:02:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:02:36,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-09-04 14:02:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:36,658 INFO L225 Difference]: With dead ends: 41545 [2020-09-04 14:02:36,658 INFO L226 Difference]: Without dead ends: 27789 [2020-09-04 14:02:36,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:02:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27789 states. [2020-09-04 14:02:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27789 to 16491. [2020-09-04 14:02:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16491 states. [2020-09-04 14:02:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16491 states to 16491 states and 24849 transitions. [2020-09-04 14:02:37,578 INFO L78 Accepts]: Start accepts. Automaton has 16491 states and 24849 transitions. Word has length 330 [2020-09-04 14:02:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:37,578 INFO L479 AbstractCegarLoop]: Abstraction has 16491 states and 24849 transitions. [2020-09-04 14:02:37,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:02:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 16491 states and 24849 transitions. [2020-09-04 14:02:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:02:37,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:37,600 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] [2020-09-04 14:02:37,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:02:37,601 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:37,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-09-04 14:02:37,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:37,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815264747] [2020-09-04 14:02:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:38,515 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:02:38,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:38,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815264747] [2020-09-04 14:02:38,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:38,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:38,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712540571] [2020-09-04 14:02:38,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:38,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:38,614 INFO L87 Difference]: Start difference. First operand 16491 states and 24849 transitions. Second operand 4 states. [2020-09-04 14:02:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:46,638 INFO L93 Difference]: Finished difference Result 30491 states and 46183 transitions. [2020-09-04 14:02:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:46,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-04 14:02:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:46,663 INFO L225 Difference]: With dead ends: 30491 [2020-09-04 14:02:46,663 INFO L226 Difference]: Without dead ends: 20989 [2020-09-04 14:02:46,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2020-09-04 14:02:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 18395. [2020-09-04 14:02:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18395 states. [2020-09-04 14:02:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 27871 transitions. [2020-09-04 14:02:47,455 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 27871 transitions. Word has length 330 [2020-09-04 14:02:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:47,455 INFO L479 AbstractCegarLoop]: Abstraction has 18395 states and 27871 transitions. [2020-09-04 14:02:47,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 27871 transitions. [2020-09-04 14:02:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-04 14:02:47,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:47,470 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] [2020-09-04 14:02:47,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:02:47,471 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-09-04 14:02:47,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:47,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519085968] [2020-09-04 14:02:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:48,297 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:02:48,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:48,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519085968] [2020-09-04 14:02:48,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:48,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:48,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043573045] [2020-09-04 14:02:48,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:48,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:48,414 INFO L87 Difference]: Start difference. First operand 18395 states and 27871 transitions. Second operand 4 states. [2020-09-04 14:02:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:56,413 INFO L93 Difference]: Finished difference Result 33823 states and 51649 transitions. [2020-09-04 14:02:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:56,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-09-04 14:02:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:56,439 INFO L225 Difference]: With dead ends: 33823 [2020-09-04 14:02:56,439 INFO L226 Difference]: Without dead ends: 23821 [2020-09-04 14:02:56,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23821 states. [2020-09-04 14:02:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23821 to 21819. [2020-09-04 14:02:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21819 states. [2020-09-04 14:02:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21819 states to 21819 states and 33359 transitions. [2020-09-04 14:02:57,414 INFO L78 Accepts]: Start accepts. Automaton has 21819 states and 33359 transitions. Word has length 332 [2020-09-04 14:02:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:57,414 INFO L479 AbstractCegarLoop]: Abstraction has 21819 states and 33359 transitions. [2020-09-04 14:02:57,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21819 states and 33359 transitions. [2020-09-04 14:02:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-04 14:02:57,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:57,429 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] [2020-09-04 14:02:57,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:02:57,429 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2033012311, now seen corresponding path program 1 times [2020-09-04 14:02:57,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:57,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153051676] [2020-09-04 14:02:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:58,403 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:02:58,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:58,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153051676] [2020-09-04 14:02:58,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:58,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:58,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918751624] [2020-09-04 14:02:58,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:58,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:58,509 INFO L87 Difference]: Start difference. First operand 21819 states and 33359 transitions. Second operand 4 states. [2020-09-04 14:03:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:09,921 INFO L93 Difference]: Finished difference Result 59507 states and 90499 transitions. [2020-09-04 14:03:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:09,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-09-04 14:03:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:09,967 INFO L225 Difference]: With dead ends: 59507 [2020-09-04 14:03:09,968 INFO L226 Difference]: Without dead ends: 40395 [2020-09-04 14:03:09,988 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 [2020-09-04 14:03:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40395 states. [2020-09-04 14:03:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40395 to 22147. [2020-09-04 14:03:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22147 states. [2020-09-04 14:03:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22147 states to 22147 states and 33797 transitions. [2020-09-04 14:03:11,307 INFO L78 Accepts]: Start accepts. Automaton has 22147 states and 33797 transitions. Word has length 332 [2020-09-04 14:03:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:11,308 INFO L479 AbstractCegarLoop]: Abstraction has 22147 states and 33797 transitions. [2020-09-04 14:03:11,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 22147 states and 33797 transitions. [2020-09-04 14:03:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-09-04 14:03:11,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:11,326 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] [2020-09-04 14:03:11,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:03:11,327 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -273553115, now seen corresponding path program 1 times [2020-09-04 14:03:11,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:11,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629855737] [2020-09-04 14:03:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:12,127 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:03:12,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:12,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629855737] [2020-09-04 14:03:12,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:12,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:12,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930980898] [2020-09-04 14:03:12,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:12,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:12,208 INFO L87 Difference]: Start difference. First operand 22147 states and 33797 transitions. Second operand 4 states. [2020-09-04 14:03:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:23,892 INFO L93 Difference]: Finished difference Result 59783 states and 90773 transitions. [2020-09-04 14:03:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:23,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-09-04 14:03:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:23,944 INFO L225 Difference]: With dead ends: 59783 [2020-09-04 14:03:23,945 INFO L226 Difference]: Without dead ends: 40691 [2020-09-04 14:03:23,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2020-09-04 14:03:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 22475. [2020-09-04 14:03:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22475 states. [2020-09-04 14:03:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22475 states to 22475 states and 34165 transitions. [2020-09-04 14:03:25,440 INFO L78 Accepts]: Start accepts. Automaton has 22475 states and 34165 transitions. Word has length 333 [2020-09-04 14:03:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:25,440 INFO L479 AbstractCegarLoop]: Abstraction has 22475 states and 34165 transitions. [2020-09-04 14:03:25,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 22475 states and 34165 transitions. [2020-09-04 14:03:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-09-04 14:03:25,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:25,461 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] [2020-09-04 14:03:25,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:03:25,462 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1275140562, now seen corresponding path program 1 times [2020-09-04 14:03:25,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:25,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891905992] [2020-09-04 14:03:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:26,673 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:03:26,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:26,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891905992] [2020-09-04 14:03:26,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:26,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 14:03:26,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613836987] [2020-09-04 14:03:26,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 14:03:26,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 14:03:26,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 14:03:26,813 INFO L87 Difference]: Start difference. First operand 22475 states and 34165 transitions. Second operand 10 states. [2020-09-04 14:03:27,603 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-09-04 14:03:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:39,891 INFO L93 Difference]: Finished difference Result 65989 states and 102088 transitions. [2020-09-04 14:03:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 14:03:39,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 333 [2020-09-04 14:03:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:39,955 INFO L225 Difference]: With dead ends: 65989 [2020-09-04 14:03:39,956 INFO L226 Difference]: Without dead ends: 51735 [2020-09-04 14:03:39,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-09-04 14:03:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51735 states. [2020-09-04 14:03:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51735 to 41573. [2020-09-04 14:03:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41573 states. [2020-09-04 14:03:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41573 states to 41573 states and 63357 transitions. [2020-09-04 14:03:42,768 INFO L78 Accepts]: Start accepts. Automaton has 41573 states and 63357 transitions. Word has length 333 [2020-09-04 14:03:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:42,768 INFO L479 AbstractCegarLoop]: Abstraction has 41573 states and 63357 transitions. [2020-09-04 14:03:42,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 14:03:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 41573 states and 63357 transitions. [2020-09-04 14:03:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-09-04 14:03:42,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:42,786 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] [2020-09-04 14:03:42,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:03:42,786 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:42,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:42,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-09-04 14:03:42,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:42,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364261048] [2020-09-04 14:03:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:44,002 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:03:44,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:44,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364261048] [2020-09-04 14:03:44,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:44,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:03:44,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798716734] [2020-09-04 14:03:44,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:03:44,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:03:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:03:44,143 INFO L87 Difference]: Start difference. First operand 41573 states and 63357 transitions. Second operand 5 states. [2020-09-04 14:03:44,863 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-09-04 14:03:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:54,785 INFO L93 Difference]: Finished difference Result 70055 states and 109281 transitions. [2020-09-04 14:03:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 14:03:54,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-09-04 14:03:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:54,851 INFO L225 Difference]: With dead ends: 70055 [2020-09-04 14:03:54,852 INFO L226 Difference]: Without dead ends: 49391 [2020-09-04 14:03:54,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:03:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49391 states. [2020-09-04 14:03:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49391 to 49389. [2020-09-04 14:03:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49389 states. [2020-09-04 14:03:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49389 states to 49389 states and 75753 transitions. [2020-09-04 14:03:58,112 INFO L78 Accepts]: Start accepts. Automaton has 49389 states and 75753 transitions. Word has length 333 [2020-09-04 14:03:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:58,113 INFO L479 AbstractCegarLoop]: Abstraction has 49389 states and 75753 transitions. [2020-09-04 14:03:58,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:03:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 49389 states and 75753 transitions. [2020-09-04 14:03:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-09-04 14:03:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:58,132 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] [2020-09-04 14:03:58,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:03:58,133 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-09-04 14:03:58,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:58,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277484800] [2020-09-04 14:03:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:59,321 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:03:59,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:59,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277484800] [2020-09-04 14:03:59,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:59,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:03:59,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400363071] [2020-09-04 14:03:59,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:03:59,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:03:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:03:59,448 INFO L87 Difference]: Start difference. First operand 49389 states and 75753 transitions. Second operand 5 states. [2020-09-04 14:04:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:15,920 INFO L93 Difference]: Finished difference Result 144252 states and 220978 transitions. [2020-09-04 14:04:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:04:15,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-09-04 14:04:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:16,032 INFO L225 Difference]: With dead ends: 144252 [2020-09-04 14:04:16,032 INFO L226 Difference]: Without dead ends: 95694 [2020-09-04 14:04:16,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:04:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-09-04 14:04:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 95692. [2020-09-04 14:04:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95692 states. [2020-09-04 14:04:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95692 states to 95692 states and 145852 transitions. [2020-09-04 14:04:24,352 INFO L78 Accepts]: Start accepts. Automaton has 95692 states and 145852 transitions. Word has length 333 [2020-09-04 14:04:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:24,352 INFO L479 AbstractCegarLoop]: Abstraction has 95692 states and 145852 transitions. [2020-09-04 14:04:24,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:04:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 95692 states and 145852 transitions. [2020-09-04 14:04:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-04 14:04:24,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:24,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:24,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 14:04:24,388 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1968714646, now seen corresponding path program 1 times [2020-09-04 14:04:24,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:24,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667777822] [2020-09-04 14:04:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:25,535 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:04:25,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:04:25,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667777822] [2020-09-04 14:04:25,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:25,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:04:25,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018497679] [2020-09-04 14:04:25,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:04:25,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:04:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:04:25,669 INFO L87 Difference]: Start difference. First operand 95692 states and 145852 transitions. Second operand 5 states. [2020-09-04 14:04:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:42,048 INFO L93 Difference]: Finished difference Result 137921 states and 210173 transitions. [2020-09-04 14:04:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:04:42,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-09-04 14:04:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:42,181 INFO L225 Difference]: With dead ends: 137921 [2020-09-04 14:04:42,181 INFO L226 Difference]: Without dead ends: 95694 [2020-09-04 14:04:42,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:04:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-09-04 14:04:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 91406. [2020-09-04 14:04:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91406 states. [2020-09-04 14:04:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91406 states to 91406 states and 139668 transitions. [2020-09-04 14:04:51,513 INFO L78 Accepts]: Start accepts. Automaton has 91406 states and 139668 transitions. Word has length 334 [2020-09-04 14:04:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:51,514 INFO L479 AbstractCegarLoop]: Abstraction has 91406 states and 139668 transitions. [2020-09-04 14:04:51,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:04:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 91406 states and 139668 transitions. [2020-09-04 14:04:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-09-04 14:04:51,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:51,545 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] [2020-09-04 14:04:51,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 14:04:51,546 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:51,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1241415225, now seen corresponding path program 1 times [2020-09-04 14:04:51,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:51,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513715949] [2020-09-04 14:04:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:52,395 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:04:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:04:52,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513715949] [2020-09-04 14:04:52,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:52,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:52,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085668783] [2020-09-04 14:04:52,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:52,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:52,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:52,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:52,471 INFO L87 Difference]: Start difference. First operand 91406 states and 139668 transitions. Second operand 4 states. [2020-09-04 14:05:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:16,933 INFO L93 Difference]: Finished difference Result 270320 states and 412826 transitions. [2020-09-04 14:05:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:05:16,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-09-04 14:05:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:17,166 INFO L225 Difference]: With dead ends: 270320 [2020-09-04 14:05:17,166 INFO L226 Difference]: Without dead ends: 180528 [2020-09-04 14:05:17,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180528 states. [2020-09-04 14:05:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180528 to 91750. [2020-09-04 14:05:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91750 states. [2020-09-04 14:05:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91750 states to 91750 states and 140036 transitions. [2020-09-04 14:05:27,991 INFO L78 Accepts]: Start accepts. Automaton has 91750 states and 140036 transitions. Word has length 337 [2020-09-04 14:05:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:27,991 INFO L479 AbstractCegarLoop]: Abstraction has 91750 states and 140036 transitions. [2020-09-04 14:05:27,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:05:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 91750 states and 140036 transitions. [2020-09-04 14:05:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-09-04 14:05:28,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:28,025 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] [2020-09-04 14:05:28,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 14:05:28,025 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:28,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1683426062, now seen corresponding path program 1 times [2020-09-04 14:05:28,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:28,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828769699] [2020-09-04 14:05:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:28,940 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:05:28,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:05:29,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828769699] [2020-09-04 14:05:29,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:29,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:05:29,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009577606] [2020-09-04 14:05:29,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:05:29,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:05:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:29,056 INFO L87 Difference]: Start difference. First operand 91750 states and 140036 transitions. Second operand 4 states. [2020-09-04 14:05:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:54,061 INFO L93 Difference]: Finished difference Result 264309 states and 403517 transitions. [2020-09-04 14:05:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:05:54,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-09-04 14:05:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:54,303 INFO L225 Difference]: With dead ends: 264309 [2020-09-04 14:05:54,304 INFO L226 Difference]: Without dead ends: 177799 [2020-09-04 14:05:57,186 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 [2020-09-04 14:05:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177799 states. [2020-09-04 14:06:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177799 to 177797. [2020-09-04 14:06:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177797 states. [2020-09-04 14:06:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177797 states to 177797 states and 270305 transitions. [2020-09-04 14:06:14,416 INFO L78 Accepts]: Start accepts. Automaton has 177797 states and 270305 transitions. Word has length 337 [2020-09-04 14:06:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:14,416 INFO L479 AbstractCegarLoop]: Abstraction has 177797 states and 270305 transitions. [2020-09-04 14:06:14,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:06:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 177797 states and 270305 transitions. [2020-09-04 14:06:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-04 14:06:14,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:14,486 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] [2020-09-04 14:06:14,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 14:06:14,486 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1966579330, now seen corresponding path program 1 times [2020-09-04 14:06:14,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:14,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62994172] [2020-09-04 14:06:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:15,438 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:06:15,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:15,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62994172] [2020-09-04 14:06:15,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:15,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:06:15,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417591997] [2020-09-04 14:06:15,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:06:15,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:06:15,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:15,545 INFO L87 Difference]: Start difference. First operand 177797 states and 270305 transitions. Second operand 4 states. [2020-09-04 14:06:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:59,150 INFO L93 Difference]: Finished difference Result 512409 states and 777349 transitions. [2020-09-04 14:06:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:06:59,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-09-04 14:06:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:59,593 INFO L225 Difference]: With dead ends: 512409 [2020-09-04 14:06:59,593 INFO L226 Difference]: Without dead ends: 337394 [2020-09-04 14:06:59,717 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 [2020-09-04 14:06:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337394 states. [2020-09-04 14:07:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337394 to 337392. [2020-09-04 14:07:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337392 states. [2020-09-04 14:07:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337392 states to 337392 states and 507965 transitions. [2020-09-04 14:07:33,211 INFO L78 Accepts]: Start accepts. Automaton has 337392 states and 507965 transitions. Word has length 339 [2020-09-04 14:07:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:33,212 INFO L479 AbstractCegarLoop]: Abstraction has 337392 states and 507965 transitions. [2020-09-04 14:07:33,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:07:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 337392 states and 507965 transitions. [2020-09-04 14:07:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-04 14:07:33,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:33,359 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] [2020-09-04 14:07:33,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 14:07:33,360 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1882657510, now seen corresponding path program 1 times [2020-09-04 14:07:33,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:33,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945548306] [2020-09-04 14:07:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:35,218 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:07:35,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:07:35,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945548306] [2020-09-04 14:07:35,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:35,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:07:35,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074021540] [2020-09-04 14:07:35,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:07:35,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:07:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:07:35,296 INFO L87 Difference]: Start difference. First operand 337392 states and 507965 transitions. Second operand 5 states. [2020-09-04 14:08:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:08:21,417 INFO L93 Difference]: Finished difference Result 699505 states and 1050397 transitions. [2020-09-04 14:08:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:08:21,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-09-04 14:08:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:08:21,944 INFO L225 Difference]: With dead ends: 699505 [2020-09-04 14:08:21,944 INFO L226 Difference]: Without dead ends: 352215 [2020-09-04 14:08:22,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:08:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352215 states. [2020-09-04 14:09:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352215 to 352213. [2020-09-04 14:09:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352213 states. [2020-09-04 14:09:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352213 states to 352213 states and 526237 transitions. [2020-09-04 14:09:09,032 INFO L78 Accepts]: Start accepts. Automaton has 352213 states and 526237 transitions. Word has length 339 [2020-09-04 14:09:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:09,032 INFO L479 AbstractCegarLoop]: Abstraction has 352213 states and 526237 transitions. [2020-09-04 14:09:09,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:09:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 352213 states and 526237 transitions. [2020-09-04 14:09:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-09-04 14:09:09,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:09,160 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] [2020-09-04 14:09:09,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 14:09:09,161 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1719490276, now seen corresponding path program 1 times [2020-09-04 14:09:09,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:09,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30540946] [2020-09-04 14:09:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:10,065 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:09:10,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:09:10,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30540946] [2020-09-04 14:09:10,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:10,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:09:10,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512674099] [2020-09-04 14:09:10,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:09:10,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:09:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:10,171 INFO L87 Difference]: Start difference. First operand 352213 states and 526237 transitions. Second operand 4 states. [2020-09-04 14:10:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:10:18,086 INFO L93 Difference]: Finished difference Result 846681 states and 1282567 transitions. [2020-09-04 14:10:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:10:18,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-09-04 14:10:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:10:19,111 INFO L225 Difference]: With dead ends: 846681 [2020-09-04 14:10:19,111 INFO L226 Difference]: Without dead ends: 557571 [2020-09-04 14:10:19,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:10:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557571 states. [2020-09-04 14:11:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557571 to 514081. [2020-09-04 14:11:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514081 states. [2020-09-04 14:11:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514081 states to 514081 states and 776541 transitions. [2020-09-04 14:11:19,899 INFO L78 Accepts]: Start accepts. Automaton has 514081 states and 776541 transitions. Word has length 340 [2020-09-04 14:11:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:11:19,899 INFO L479 AbstractCegarLoop]: Abstraction has 514081 states and 776541 transitions. [2020-09-04 14:11:19,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:11:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 514081 states and 776541 transitions. [2020-09-04 14:11:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-09-04 14:11:20,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:11:20,068 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] [2020-09-04 14:11:20,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 14:11:20,068 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:11:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:11:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash 989201276, now seen corresponding path program 1 times [2020-09-04 14:11:20,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:11:20,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574421575] [2020-09-04 14:11:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:11:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:11:20,906 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:11:20,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:11:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:11:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:11:20,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574421575] [2020-09-04 14:11:20,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:11:20,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:11:20,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418636809] [2020-09-04 14:11:20,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:11:20,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:11:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:11:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:11:20,981 INFO L87 Difference]: Start difference. First operand 514081 states and 776541 transitions. Second operand 4 states.