/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 14:01:00,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 14:01:00,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 14:01:00,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 14:01:00,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 14:01:00,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 14:01:00,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 14:01:00,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 14:01:00,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 14:01:00,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 14:01:00,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 14:01:00,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 14:01:00,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 14:01:00,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 14:01:00,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 14:01:00,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 14:01:00,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 14:01:00,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 14:01:00,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 14:01:00,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 14:01:00,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 14:01:00,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 14:01:00,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 14:01:00,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 14:01:00,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 14:01:00,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 14:01:00,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 14:01:00,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 14:01:00,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 14:01:00,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 14:01:00,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 14:01:00,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 14:01:00,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 14:01:00,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 14:01:00,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 14:01:00,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 14:01:00,243 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 14:01:00,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 14:01:00,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 14:01:00,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 14:01:00,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 14:01:00,283 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 14:01:00,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 14:01:00,284 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 14:01:00,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 14:01:00,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 14:01:00,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 14:01:00,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 14:01:00,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 14:01:00,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 14:01:00,285 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 14:01:00,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 14:01:00,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 14:01:00,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 14:01:00,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 14:01:00,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 14:01:00,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 14:01:00,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 14:01:00,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:01:00,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 14:01:00,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 14:01:00,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 14:01:00,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 14:01:00,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 14:01:00,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 14:01:00,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 14:01:00,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 14:01:00,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 14:01:00,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 14:01:00,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 14:01:00,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 14:01:00,741 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 14:01:00,742 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-09-04 14:01:00,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77bf3a96f/5ecd659293a24cda9b63096e8fc6df8b/FLAG648b3eb26 [2020-09-04 14:01:01,647 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 14:01:01,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-09-04 14:01:01,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77bf3a96f/5ecd659293a24cda9b63096e8fc6df8b/FLAG648b3eb26 [2020-09-04 14:01:01,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77bf3a96f/5ecd659293a24cda9b63096e8fc6df8b [2020-09-04 14:01:01,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 14:01:01,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 14:01:01,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 14:01:01,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 14:01:01,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 14:01:01,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:01:01" (1/1) ... [2020-09-04 14:01:01,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f78b0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:01, skipping insertion in model container [2020-09-04 14:01:01,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:01:01" (1/1) ... [2020-09-04 14:01:01,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 14:01:02,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 14:01:03,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:01:03,983 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 14:01:05,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:01:05,237 INFO L208 MainTranslator]: Completed translation [2020-09-04 14:01:05,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05 WrapperNode [2020-09-04 14:01:05,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 14:01:05,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 14:01:05,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 14:01:05,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 14:01:05,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (1/1) ... [2020-09-04 14:01:05,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 14:01:05,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 14:01:05,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 14:01:05,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 14:01:05,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (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 14:01:05,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 14:01:05,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 14:01:05,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 14:01:05,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 14:01:05,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 14:01:05,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 14:01:05,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 14:01:05,629 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 14:01:05,630 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 14:01:05,631 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 14:01:05,631 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 14:01:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 14:01:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-04 14:01:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 14:01:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 14:01:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 14:01:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 14:01:05,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 14:01:10,302 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 14:01:10,302 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 14:01:10,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:01:10 BoogieIcfgContainer [2020-09-04 14:01:10,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 14:01:10,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 14:01:10,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 14:01:10,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 14:01:10,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 02:01:01" (1/3) ... [2020-09-04 14:01:10,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6b33b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:01:10, skipping insertion in model container [2020-09-04 14:01:10,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:01:05" (2/3) ... [2020-09-04 14:01:10,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6b33b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:01:10, skipping insertion in model container [2020-09-04 14:01:10,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:01:10" (3/3) ... [2020-09-04 14:01:10,325 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-09-04 14:01:10,337 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 14:01:10,354 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-04 14:01:10,375 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-04 14:01:10,413 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 14:01:10,413 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 14:01:10,413 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 14:01:10,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 14:01:10,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 14:01:10,414 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 14:01:10,414 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 14:01:10,414 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 14:01:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-09-04 14:01:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-09-04 14:01:10,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:10,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:10,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:10,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-09-04 14:01:10,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:10,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962953773] [2020-09-04 14:01:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:14,352 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:01:14,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:15,083 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 14:01:15,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962953773] [2020-09-04 14:01:15,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:15,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:15,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025430846] [2020-09-04 14:01:15,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:15,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:15,119 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 5 states. [2020-09-04 14:01:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:34,397 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-09-04 14:01:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 14:01:34,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-09-04 14:01:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:34,454 INFO L225 Difference]: With dead ends: 4394 [2020-09-04 14:01:34,454 INFO L226 Difference]: Without dead ends: 2919 [2020-09-04 14:01:34,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:01:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-09-04 14:01:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-09-04 14:01:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-09-04 14:01:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-09-04 14:01:34,738 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-09-04 14:01:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:34,744 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-09-04 14:01:34,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:01:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-09-04 14:01:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-09-04 14:01:34,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:34,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:34,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 14:01:34,764 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-09-04 14:01:34,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:34,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859662240] [2020-09-04 14:01:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:36,693 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:01:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:37,045 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 14:01:37,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859662240] [2020-09-04 14:01:37,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:37,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:37,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435884582] [2020-09-04 14:01:37,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:37,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:37,049 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states. [2020-09-04 14:01:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:59,823 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-09-04 14:01:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:59,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-09-04 14:01:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:59,857 INFO L225 Difference]: With dead ends: 8316 [2020-09-04 14:01:59,858 INFO L226 Difference]: Without dead ends: 5665 [2020-09-04 14:01:59,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-09-04 14:02:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-09-04 14:02:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-09-04 14:02:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-09-04 14:02:00,072 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-09-04 14:02:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:00,073 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-09-04 14:02:00,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-09-04 14:02:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-04 14:02:00,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:00,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:00,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 14:02:00,096 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-09-04 14:02:00,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:00,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812759927] [2020-09-04 14:02:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:01,437 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:02:01,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:01,679 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 14:02:01,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812759927] [2020-09-04 14:02:01,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:01,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:01,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643787201] [2020-09-04 14:02:01,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:01,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:01,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:01,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:01,683 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 4 states. [2020-09-04 14:02:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:23,361 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-09-04 14:02:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:23,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-09-04 14:02:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:23,418 INFO L225 Difference]: With dead ends: 16742 [2020-09-04 14:02:23,418 INFO L226 Difference]: Without dead ends: 11181 [2020-09-04 14:02:23,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-09-04 14:02:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-09-04 14:02:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-09-04 14:02:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-09-04 14:02:23,739 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-09-04 14:02:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:23,739 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-09-04 14:02:23,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-09-04 14:02:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:02:23,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:23,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:23,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 14:02:23,755 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-09-04 14:02:23,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:23,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721083305] [2020-09-04 14:02:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:25,475 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:02:25,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:25,764 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 14:02:25,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721083305] [2020-09-04 14:02:25,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:25,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:25,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583882997] [2020-09-04 14:02:25,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:25,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:25,768 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 4 states. [2020-09-04 14:02:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:48,030 INFO L93 Difference]: Finished difference Result 16304 states and 26694 transitions. [2020-09-04 14:02:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:48,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-09-04 14:02:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:48,074 INFO L225 Difference]: With dead ends: 16304 [2020-09-04 14:02:48,074 INFO L226 Difference]: Without dead ends: 11043 [2020-09-04 14:02:48,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-09-04 14:02:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-09-04 14:02:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-09-04 14:02:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17977 transitions. [2020-09-04 14:02:48,504 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17977 transitions. Word has length 488 [2020-09-04 14:02:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:48,505 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 17977 transitions. [2020-09-04 14:02:48,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17977 transitions. [2020-09-04 14:02:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:02:48,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:48,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:48,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 14:02:48,533 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1928250536, now seen corresponding path program 1 times [2020-09-04 14:02:48,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:48,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897370191] [2020-09-04 14:02:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:49,935 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:02:49,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:50,200 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 14:02:50,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897370191] [2020-09-04 14:02:50,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:50,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:50,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731123332] [2020-09-04 14:02:50,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:50,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:50,204 INFO L87 Difference]: Start difference. First operand 10993 states and 17977 transitions. Second operand 4 states. [2020-09-04 14:03:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:13,370 INFO L93 Difference]: Finished difference Result 32723 states and 53486 transitions. [2020-09-04 14:03:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:13,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-09-04 14:03:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:13,425 INFO L225 Difference]: With dead ends: 32723 [2020-09-04 14:03:13,425 INFO L226 Difference]: Without dead ends: 21874 [2020-09-04 14:03:13,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2020-09-04 14:03:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 11091. [2020-09-04 14:03:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-09-04 14:03:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18128 transitions. [2020-09-04 14:03:13,982 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18128 transitions. Word has length 488 [2020-09-04 14:03:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:13,982 INFO L479 AbstractCegarLoop]: Abstraction has 11091 states and 18128 transitions. [2020-09-04 14:03:13,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18128 transitions. [2020-09-04 14:03:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-09-04 14:03:14,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:14,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:14,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:03:14,004 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash 844567664, now seen corresponding path program 1 times [2020-09-04 14:03:14,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:14,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84713549] [2020-09-04 14:03:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:15,487 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:03:15,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:15,777 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 14:03:15,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84713549] [2020-09-04 14:03:15,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:15,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:15,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208137429] [2020-09-04 14:03:15,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:15,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:15,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:15,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:15,780 INFO L87 Difference]: Start difference. First operand 11091 states and 18128 transitions. Second operand 4 states. [2020-09-04 14:03:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:40,166 INFO L93 Difference]: Finished difference Result 32858 states and 53667 transitions. [2020-09-04 14:03:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:40,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-09-04 14:03:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:40,213 INFO L225 Difference]: With dead ends: 32858 [2020-09-04 14:03:40,213 INFO L226 Difference]: Without dead ends: 21991 [2020-09-04 14:03:40,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21991 states. [2020-09-04 14:03:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21991 to 11208. [2020-09-04 14:03:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-09-04 14:03:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18274 transitions. [2020-09-04 14:03:41,015 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18274 transitions. Word has length 489 [2020-09-04 14:03:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:41,015 INFO L479 AbstractCegarLoop]: Abstraction has 11208 states and 18274 transitions. [2020-09-04 14:03:41,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18274 transitions. [2020-09-04 14:03:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-09-04 14:03:41,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:41,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:41,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:03:41,036 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2127508510, now seen corresponding path program 1 times [2020-09-04 14:03:41,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:41,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847121939] [2020-09-04 14:03:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:42,724 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:03:42,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:42,952 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 14:03:42,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847121939] [2020-09-04 14:03:42,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:42,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:42,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972283613] [2020-09-04 14:03:42,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:42,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:42,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:42,957 INFO L87 Difference]: Start difference. First operand 11208 states and 18274 transitions. Second operand 4 states. [2020-09-04 14:03:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:59,081 INFO L93 Difference]: Finished difference Result 21557 states and 34732 transitions. [2020-09-04 14:03:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:59,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-09-04 14:03:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:59,111 INFO L225 Difference]: With dead ends: 21557 [2020-09-04 14:03:59,111 INFO L226 Difference]: Without dead ends: 14874 [2020-09-04 14:03:59,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2020-09-04 14:03:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 12752. [2020-09-04 14:03:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-09-04 14:03:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 20834 transitions. [2020-09-04 14:03:59,901 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 20834 transitions. Word has length 490 [2020-09-04 14:03:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:59,902 INFO L479 AbstractCegarLoop]: Abstraction has 12752 states and 20834 transitions. [2020-09-04 14:03:59,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 20834 transitions. [2020-09-04 14:03:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-09-04 14:03:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:59,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:59,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:03:59,917 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash -667258338, now seen corresponding path program 1 times [2020-09-04 14:03:59,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:59,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844530836] [2020-09-04 14:03:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:01,637 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:04:01,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:02,140 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 14:04:02,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844530836] [2020-09-04 14:04:02,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:02,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:02,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174823416] [2020-09-04 14:04:02,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:02,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:02,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:02,143 INFO L87 Difference]: Start difference. First operand 12752 states and 20834 transitions. Second operand 4 states. [2020-09-04 14:04:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:26,683 INFO L93 Difference]: Finished difference Result 36492 states and 59503 transitions. [2020-09-04 14:04:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:26,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-09-04 14:04:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:26,719 INFO L225 Difference]: With dead ends: 36492 [2020-09-04 14:04:26,720 INFO L226 Difference]: Without dead ends: 24709 [2020-09-04 14:04:26,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24709 states. [2020-09-04 14:04:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24709 to 24661. [2020-09-04 14:04:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24661 states. [2020-09-04 14:04:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 40123 transitions. [2020-09-04 14:04:27,907 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 40123 transitions. Word has length 490 [2020-09-04 14:04:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:27,908 INFO L479 AbstractCegarLoop]: Abstraction has 24661 states and 40123 transitions. [2020-09-04 14:04:27,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 40123 transitions. [2020-09-04 14:04:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-09-04 14:04:27,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:27,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:27,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:04:27,935 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash 656055547, now seen corresponding path program 1 times [2020-09-04 14:04:27,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:27,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330969624] [2020-09-04 14:04:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:30,158 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:04:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:30,532 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 14:04:30,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330969624] [2020-09-04 14:04:30,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:30,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:04:30,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400263068] [2020-09-04 14:04:30,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:04:30,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:30,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:04:30,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:04:30,535 INFO L87 Difference]: Start difference. First operand 24661 states and 40123 transitions. Second operand 5 states. [2020-09-04 14:04:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:54,118 INFO L93 Difference]: Finished difference Result 57139 states and 93438 transitions. [2020-09-04 14:04:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:04:54,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-09-04 14:04:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:54,157 INFO L225 Difference]: With dead ends: 57139 [2020-09-04 14:04:54,157 INFO L226 Difference]: Without dead ends: 29180 [2020-09-04 14:04:54,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:04:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29180 states. [2020-09-04 14:04:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29180 to 29123. [2020-09-04 14:04:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29123 states. [2020-09-04 14:04:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29123 states to 29123 states and 47478 transitions. [2020-09-04 14:04:55,461 INFO L78 Accepts]: Start accepts. Automaton has 29123 states and 47478 transitions. Word has length 490 [2020-09-04 14:04:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:55,462 INFO L479 AbstractCegarLoop]: Abstraction has 29123 states and 47478 transitions. [2020-09-04 14:04:55,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:04:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 29123 states and 47478 transitions. [2020-09-04 14:04:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-09-04 14:04:55,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:55,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:55,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:04:55,490 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:55,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1697744443, now seen corresponding path program 1 times [2020-09-04 14:04:55,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:55,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276464185] [2020-09-04 14:04:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:57,401 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:04:57,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:58,215 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 14:04:58,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276464185] [2020-09-04 14:04:58,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:58,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:58,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711347038] [2020-09-04 14:04:58,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:58,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:58,220 INFO L87 Difference]: Start difference. First operand 29123 states and 47478 transitions. Second operand 4 states. [2020-09-04 14:05:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:25,874 INFO L93 Difference]: Finished difference Result 85361 states and 139207 transitions. [2020-09-04 14:05:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:05:25,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-09-04 14:05:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:25,934 INFO L225 Difference]: With dead ends: 85361 [2020-09-04 14:05:25,934 INFO L226 Difference]: Without dead ends: 57258 [2020-09-04 14:05:25,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57258 states. [2020-09-04 14:05:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57258 to 57219. [2020-09-04 14:05:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57219 states. [2020-09-04 14:05:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57219 states to 57219 states and 92958 transitions. [2020-09-04 14:05:29,981 INFO L78 Accepts]: Start accepts. Automaton has 57219 states and 92958 transitions. Word has length 492 [2020-09-04 14:05:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:29,981 INFO L479 AbstractCegarLoop]: Abstraction has 57219 states and 92958 transitions. [2020-09-04 14:05:29,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:05:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 57219 states and 92958 transitions. [2020-09-04 14:05:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-09-04 14:05:30,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:30,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:05:30,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:05:30,038 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 12438715, now seen corresponding path program 1 times [2020-09-04 14:05:30,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:30,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204744107] [2020-09-04 14:05:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:31,626 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:05:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:31,814 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 14:05:31,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204744107] [2020-09-04 14:05:31,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:31,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:05:31,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847312633] [2020-09-04 14:05:31,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:05:31,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:05:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:31,816 INFO L87 Difference]: Start difference. First operand 57219 states and 92958 transitions. Second operand 4 states. [2020-09-04 14:05:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:52,315 INFO L93 Difference]: Finished difference Result 104837 states and 168893 transitions. [2020-09-04 14:05:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:05:52,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-09-04 14:05:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:52,391 INFO L225 Difference]: With dead ends: 104837 [2020-09-04 14:05:52,391 INFO L226 Difference]: Without dead ends: 74643 [2020-09-04 14:05:52,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74643 states. [2020-09-04 14:05:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74643 to 68099. [2020-09-04 14:05:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68099 states. [2020-09-04 14:05:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68099 states to 68099 states and 110830 transitions. [2020-09-04 14:05:55,468 INFO L78 Accepts]: Start accepts. Automaton has 68099 states and 110830 transitions. Word has length 492 [2020-09-04 14:05:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:55,469 INFO L479 AbstractCegarLoop]: Abstraction has 68099 states and 110830 transitions. [2020-09-04 14:05:55,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:05:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 68099 states and 110830 transitions. [2020-09-04 14:05:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:05:55,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:55,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:05:55,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:05:55,513 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash 888450607, now seen corresponding path program 1 times [2020-09-04 14:05:55,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:55,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97871146] [2020-09-04 14:05:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:57,271 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:05:57,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:57,533 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 14:05:57,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97871146] [2020-09-04 14:05:57,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:57,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:05:57,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921088140] [2020-09-04 14:05:57,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 14:05:57,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:57,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 14:05:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:05:57,536 INFO L87 Difference]: Start difference. First operand 68099 states and 110830 transitions. Second operand 6 states. [2020-09-04 14:05:58,880 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 412 [2020-09-04 14:06:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:16,339 INFO L93 Difference]: Finished difference Result 111717 states and 180182 transitions. [2020-09-04 14:06:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 14:06:16,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 493 [2020-09-04 14:06:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:16,457 INFO L225 Difference]: With dead ends: 111717 [2020-09-04 14:06:16,457 INFO L226 Difference]: Without dead ends: 68099 [2020-09-04 14:06:16,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-04 14:06:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68099 states. [2020-09-04 14:06:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68099 to 68099. [2020-09-04 14:06:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68099 states. [2020-09-04 14:06:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68099 states to 68099 states and 110214 transitions. [2020-09-04 14:06:21,738 INFO L78 Accepts]: Start accepts. Automaton has 68099 states and 110214 transitions. Word has length 493 [2020-09-04 14:06:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:21,738 INFO L479 AbstractCegarLoop]: Abstraction has 68099 states and 110214 transitions. [2020-09-04 14:06:21,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 14:06:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 68099 states and 110214 transitions. [2020-09-04 14:06:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:06:21,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:21,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:06:21,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:06:21,797 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -973547532, now seen corresponding path program 1 times [2020-09-04 14:06:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:21,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76866390] [2020-09-04 14:06:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:24,051 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:06:24,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:24,452 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 14:06:24,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76866390] [2020-09-04 14:06:24,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:24,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 14:06:24,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934534436] [2020-09-04 14:06:24,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 14:06:24,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 14:06:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 14:06:24,456 INFO L87 Difference]: Start difference. First operand 68099 states and 110214 transitions. Second operand 9 states. [2020-09-04 14:06:25,838 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 411 [2020-09-04 14:06:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:53,038 INFO L93 Difference]: Finished difference Result 152158 states and 244257 transitions. [2020-09-04 14:06:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 14:06:53,039 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2020-09-04 14:06:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:53,162 INFO L225 Difference]: With dead ends: 152158 [2020-09-04 14:06:53,162 INFO L226 Difference]: Without dead ends: 109692 [2020-09-04 14:06:53,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-09-04 14:06:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109692 states. [2020-09-04 14:06:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109692 to 80075. [2020-09-04 14:06:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80075 states. [2020-09-04 14:06:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80075 states to 80075 states and 127414 transitions. [2020-09-04 14:06:57,255 INFO L78 Accepts]: Start accepts. Automaton has 80075 states and 127414 transitions. Word has length 493 [2020-09-04 14:06:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:57,255 INFO L479 AbstractCegarLoop]: Abstraction has 80075 states and 127414 transitions. [2020-09-04 14:06:57,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 14:06:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 80075 states and 127414 transitions. [2020-09-04 14:06:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:06:57,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:57,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:06:57,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:06:57,303 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash -128473503, now seen corresponding path program 1 times [2020-09-04 14:06:57,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:57,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812646088] [2020-09-04 14:06:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:59,711 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:06:59,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:59,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812646088] [2020-09-04 14:06:59,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:59,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:06:59,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987293225] [2020-09-04 14:06:59,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:06:59,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:06:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:06:59,967 INFO L87 Difference]: Start difference. First operand 80075 states and 127414 transitions. Second operand 5 states. [2020-09-04 14:07:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:30,729 INFO L93 Difference]: Finished difference Result 234380 states and 373059 transitions. [2020-09-04 14:07:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:07:30,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-09-04 14:07:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:30,929 INFO L225 Difference]: With dead ends: 234380 [2020-09-04 14:07:30,930 INFO L226 Difference]: Without dead ends: 155741 [2020-09-04 14:07:31,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:07:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155741 states. [2020-09-04 14:07:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155741 to 155695. [2020-09-04 14:07:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155695 states. [2020-09-04 14:07:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155695 states to 155695 states and 247126 transitions. [2020-09-04 14:07:42,020 INFO L78 Accepts]: Start accepts. Automaton has 155695 states and 247126 transitions. Word has length 493 [2020-09-04 14:07:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:42,020 INFO L479 AbstractCegarLoop]: Abstraction has 155695 states and 247126 transitions. [2020-09-04 14:07:42,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:07:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 155695 states and 247126 transitions. [2020-09-04 14:07:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-09-04 14:07:42,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:42,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:07:42,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:07:42,115 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:42,115 INFO L82 PathProgramCache]: Analyzing trace with hash -983128544, now seen corresponding path program 1 times [2020-09-04 14:07:42,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:42,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109505461] [2020-09-04 14:07:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:43,771 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:07:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:44,059 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 14:07:44,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109505461] [2020-09-04 14:07:44,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:44,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:07:44,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482817466] [2020-09-04 14:07:44,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:07:44,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:44,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:07:44,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:44,061 INFO L87 Difference]: Start difference. First operand 155695 states and 247126 transitions. Second operand 4 states. [2020-09-04 14:08:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:08:29,733 INFO L93 Difference]: Finished difference Result 457347 states and 724775 transitions. [2020-09-04 14:08:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:08:29,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-09-04 14:08:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:08:30,157 INFO L225 Difference]: With dead ends: 457347 [2020-09-04 14:08:30,158 INFO L226 Difference]: Without dead ends: 306331 [2020-09-04 14:08:30,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:08:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306331 states. [2020-09-04 14:08:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306331 to 306294. [2020-09-04 14:08:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306294 states. [2020-09-04 14:08:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306294 states to 306294 states and 484194 transitions. [2020-09-04 14:08:56,763 INFO L78 Accepts]: Start accepts. Automaton has 306294 states and 484194 transitions. Word has length 494 [2020-09-04 14:08:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:56,764 INFO L479 AbstractCegarLoop]: Abstraction has 306294 states and 484194 transitions. [2020-09-04 14:08:56,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:08:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 306294 states and 484194 transitions. [2020-09-04 14:08:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-09-04 14:08:56,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:56,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:08:56,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:08:56,940 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash 622715965, now seen corresponding path program 1 times [2020-09-04 14:08:56,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534525356] [2020-09-04 14:08:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:58,860 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:08:58,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:08:59,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534525356] [2020-09-04 14:08:59,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:59,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:08:59,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107619870] [2020-09-04 14:08:59,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:08:59,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:08:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:08:59,039 INFO L87 Difference]: Start difference. First operand 306294 states and 484194 transitions. Second operand 5 states. [2020-09-04 14:09:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:51,900 INFO L93 Difference]: Finished difference Result 705643 states and 1120116 transitions. [2020-09-04 14:09:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:09:51,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-09-04 14:09:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:52,363 INFO L225 Difference]: With dead ends: 705643 [2020-09-04 14:09:52,364 INFO L226 Difference]: Without dead ends: 355699 [2020-09-04 14:09:52,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:09:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355699 states. [2020-09-04 14:10:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355699 to 355585. [2020-09-04 14:10:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355585 states. [2020-09-04 14:10:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355585 states to 355585 states and 562997 transitions. [2020-09-04 14:10:27,818 INFO L78 Accepts]: Start accepts. Automaton has 355585 states and 562997 transitions. Word has length 494 [2020-09-04 14:10:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:10:27,818 INFO L479 AbstractCegarLoop]: Abstraction has 355585 states and 562997 transitions. [2020-09-04 14:10:27,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:10:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 355585 states and 562997 transitions. [2020-09-04 14:10:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-09-04 14:10:28,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:10:28,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:10:28,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:10:28,070 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:10:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:10:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash -340986835, now seen corresponding path program 1 times [2020-09-04 14:10:28,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:10:28,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972683923] [2020-09-04 14:10:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:10:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:29,808 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 406 [2020-09-04 14:10:29,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:10:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:30,124 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 14:10:30,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972683923] [2020-09-04 14:10:30,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:10:30,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:10:30,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661667914] [2020-09-04 14:10:30,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:10:30,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:10:30,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:10:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:10:30,127 INFO L87 Difference]: Start difference. First operand 355585 states and 562997 transitions. Second operand 4 states. [2020-09-04 14:11:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:11:52,781 INFO L93 Difference]: Finished difference Result 1034474 states and 1635100 transitions. [2020-09-04 14:11:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:11:52,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-09-04 14:11:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:11:54,339 INFO L225 Difference]: With dead ends: 1034474 [2020-09-04 14:11:54,339 INFO L226 Difference]: Without dead ends: 694238 [2020-09-04 14:11:54,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:11:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694238 states.