/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:43:09,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:43:09,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:43:09,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:43:09,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:43:09,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:43:09,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:43:09,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:43:09,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:43:09,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:43:09,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:43:09,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:43:09,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:43:09,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:43:09,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:43:09,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:43:09,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:43:09,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:43:09,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:43:09,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:43:09,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:43:09,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:43:09,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:43:09,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:43:09,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:43:09,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:43:09,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:43:09,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:43:09,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:43:09,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:43:09,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:43:09,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:43:09,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:43:09,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:43:09,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:43:09,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:43:09,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:43:09,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:43:09,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:43:09,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:43:09,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:43:09,211 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:43:09,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:43:09,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:43:09,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:43:09,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:43:09,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:43:09,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:43:09,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:43:09,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:43:09,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:43:09,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:43:09,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:43:09,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:43:09,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:43:09,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:43:09,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:43:09,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:43:09,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:43:09,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:43:09,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:43:09,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:43:09,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:43:09,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:43:09,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:43:09,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:43:09,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:43:09,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:43:09,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:43:09,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:43:09,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:43:09,520 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:43:09,521 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-07 11:43:09,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065ac7e01/a8a5af586b7a4fd294774e0660e19eb6/FLAGf671341d4 [2020-07-07 11:43:10,301 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:43:10,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-07 11:43:10,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065ac7e01/a8a5af586b7a4fd294774e0660e19eb6/FLAGf671341d4 [2020-07-07 11:43:10,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065ac7e01/a8a5af586b7a4fd294774e0660e19eb6 [2020-07-07 11:43:10,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:43:10,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:43:10,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:43:10,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:43:10,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:43:10,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:43:10" (1/1) ... [2020-07-07 11:43:10,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b66220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:10, skipping insertion in model container [2020-07-07 11:43:10,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:43:10" (1/1) ... [2020-07-07 11:43:10,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:43:10,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:43:11,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:43:11,713 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:43:12,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:43:12,177 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:43:12,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12 WrapperNode [2020-07-07 11:43:12,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:43:12,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:43:12,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:43:12,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:43:12,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... [2020-07-07 11:43:12,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:43:12,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:43:12,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:43:12,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:43:12,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:43:12,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:43:12,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:43:12,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:43:12,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:43:12,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:43:12,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:43:12,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:43:12,446 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:43:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:43:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:43:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:43:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:43:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:43:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:43:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:43:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:43:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:43:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:43:12,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:43:12,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:43:12,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:43:15,183 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:43:15,183 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:43:15,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:43:15 BoogieIcfgContainer [2020-07-07 11:43:15,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:43:15,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:43:15,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:43:15,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:43:15,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:43:10" (1/3) ... [2020-07-07 11:43:15,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6688360c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:43:15, skipping insertion in model container [2020-07-07 11:43:15,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:43:12" (2/3) ... [2020-07-07 11:43:15,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6688360c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:43:15, skipping insertion in model container [2020-07-07 11:43:15,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:43:15" (3/3) ... [2020-07-07 11:43:15,204 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-07 11:43:15,214 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:43:15,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:43:15,236 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:43:15,263 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:43:15,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:43:15,264 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:43:15,264 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:43:15,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:43:15,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:43:15,265 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:43:15,265 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:43:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-07 11:43:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-07 11:43:15,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:15,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:15,331 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:15,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-07 11:43:15,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:15,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399698863] [2020-07-07 11:43:15,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:17,649 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:43:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:18,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399698863] [2020-07-07 11:43:18,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:18,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:43:18,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891222863] [2020-07-07 11:43:18,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:43:18,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:43:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:18,089 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-07-07 11:43:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:26,924 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-07 11:43:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:43:26,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-07 11:43:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:26,954 INFO L225 Difference]: With dead ends: 2333 [2020-07-07 11:43:26,955 INFO L226 Difference]: Without dead ends: 1545 [2020-07-07 11:43:26,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:43:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-07 11:43:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-07 11:43:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-07 11:43:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-07 11:43:27,117 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-07 11:43:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:27,118 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-07 11:43:27,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:43:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-07 11:43:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:43:27,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:27,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:27,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:43:27,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-07 11:43:27,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:27,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432894341] [2020-07-07 11:43:27,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:28,360 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:43:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:28,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432894341] [2020-07-07 11:43:28,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:28,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:28,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073076974] [2020-07-07 11:43:28,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:28,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:28,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:28,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:28,670 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-07-07 11:43:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:38,272 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-07 11:43:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:38,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:43:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:38,291 INFO L225 Difference]: With dead ends: 4438 [2020-07-07 11:43:38,292 INFO L226 Difference]: Without dead ends: 3024 [2020-07-07 11:43:38,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-07 11:43:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-07 11:43:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-07 11:43:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-07 11:43:38,436 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-07 11:43:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:38,439 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-07 11:43:38,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-07 11:43:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-07 11:43:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:38,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:38,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:43:38,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-07 11:43:38,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:38,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970928216] [2020-07-07 11:43:38,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:39,257 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:43:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:39,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970928216] [2020-07-07 11:43:39,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:39,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:39,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631894040] [2020-07-07 11:43:39,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:39,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:39,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:39,381 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-07-07 11:43:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:47,872 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-07 11:43:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:47,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-07 11:43:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:47,901 INFO L225 Difference]: With dead ends: 8991 [2020-07-07 11:43:47,901 INFO L226 Difference]: Without dead ends: 6011 [2020-07-07 11:43:47,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-07 11:43:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-07 11:43:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-07 11:43:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-07 11:43:48,068 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-07 11:43:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:48,068 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-07 11:43:48,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-07 11:43:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-07 11:43:48,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:48,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:48,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:43:48,076 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-07 11:43:48,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:48,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508616998] [2020-07-07 11:43:48,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:48,751 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:43:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:48,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508616998] [2020-07-07 11:43:48,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:48,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:48,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294294353] [2020-07-07 11:43:48,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:48,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:48,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:48,855 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-07-07 11:43:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:57,107 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-07 11:43:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:57,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-07 11:43:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:57,133 INFO L225 Difference]: With dead ends: 9010 [2020-07-07 11:43:57,134 INFO L226 Difference]: Without dead ends: 6029 [2020-07-07 11:43:57,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-07 11:43:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-07 11:43:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-07 11:43:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-07 11:43:57,298 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-07 11:43:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:57,298 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-07 11:43:57,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-07 11:43:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-07 11:43:57,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:57,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:57,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:43:57,307 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-07 11:43:57,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:57,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905779093] [2020-07-07 11:43:57,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:58,031 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:43:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:58,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905779093] [2020-07-07 11:43:58,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:58,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:58,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525806560] [2020-07-07 11:43:58,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:58,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:58,226 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-07-07 11:44:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:06,333 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-07 11:44:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:06,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-07 11:44:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:06,361 INFO L225 Difference]: With dead ends: 8718 [2020-07-07 11:44:06,361 INFO L226 Difference]: Without dead ends: 5904 [2020-07-07 11:44:06,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-07 11:44:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-07 11:44:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-07 11:44:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-07 11:44:06,613 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-07 11:44:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:06,615 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-07 11:44:06,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-07 11:44:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-07 11:44:06,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:06,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:06,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:44:06,626 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-07 11:44:06,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:06,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551039617] [2020-07-07 11:44:06,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:07,721 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:44:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:07,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551039617] [2020-07-07 11:44:07,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:07,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:44:07,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590452482] [2020-07-07 11:44:07,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:44:07,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:44:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:07,848 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-07-07 11:44:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:14,136 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-07-07 11:44:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:14,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-07-07 11:44:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:14,164 INFO L225 Difference]: With dead ends: 13189 [2020-07-07 11:44:14,165 INFO L226 Difference]: Without dead ends: 6775 [2020-07-07 11:44:14,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-07-07 11:44:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-07-07 11:44:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-07-07 11:44:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-07-07 11:44:14,443 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-07-07 11:44:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:14,443 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-07-07 11:44:14,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:44:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-07-07 11:44:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:44:14,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:14,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:14,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:44:14,456 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-07-07 11:44:14,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:14,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692957235] [2020-07-07 11:44:14,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:15,076 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:44:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:15,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692957235] [2020-07-07 11:44:15,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:15,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:15,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325090994] [2020-07-07 11:44:15,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:15,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:15,176 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states. [2020-07-07 11:44:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:20,115 INFO L93 Difference]: Finished difference Result 19447 states and 29573 transitions. [2020-07-07 11:44:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:20,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:44:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:20,144 INFO L225 Difference]: With dead ends: 19447 [2020-07-07 11:44:20,145 INFO L226 Difference]: Without dead ends: 13127 [2020-07-07 11:44:20,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-07-07 11:44:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 6831. [2020-07-07 11:44:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2020-07-07 11:44:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 10425 transitions. [2020-07-07 11:44:20,563 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 10425 transitions. Word has length 330 [2020-07-07 11:44:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:20,564 INFO L479 AbstractCegarLoop]: Abstraction has 6831 states and 10425 transitions. [2020-07-07 11:44:20,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 10425 transitions. [2020-07-07 11:44:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:44:20,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:20,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:20,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:44:20,575 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1432284472, now seen corresponding path program 1 times [2020-07-07 11:44:20,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:20,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851520243] [2020-07-07 11:44:20,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:21,320 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:44:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:21,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851520243] [2020-07-07 11:44:21,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:21,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:21,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776236182] [2020-07-07 11:44:21,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:21,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:21,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:21,478 INFO L87 Difference]: Start difference. First operand 6831 states and 10425 transitions. Second operand 4 states. [2020-07-07 11:44:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:30,125 INFO L93 Difference]: Finished difference Result 19896 states and 30288 transitions. [2020-07-07 11:44:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:44:30,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:44:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:30,157 INFO L225 Difference]: With dead ends: 19896 [2020-07-07 11:44:30,158 INFO L226 Difference]: Without dead ends: 13350 [2020-07-07 11:44:30,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13350 states. [2020-07-07 11:44:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13350 to 13348. [2020-07-07 11:44:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13348 states. [2020-07-07 11:44:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13348 states to 13348 states and 20240 transitions. [2020-07-07 11:44:30,762 INFO L78 Accepts]: Start accepts. Automaton has 13348 states and 20240 transitions. Word has length 330 [2020-07-07 11:44:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:30,762 INFO L479 AbstractCegarLoop]: Abstraction has 13348 states and 20240 transitions. [2020-07-07 11:44:30,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 13348 states and 20240 transitions. [2020-07-07 11:44:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:44:30,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:30,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:30,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:44:30,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:30,778 INFO L82 PathProgramCache]: Analyzing trace with hash -491858715, now seen corresponding path program 1 times [2020-07-07 11:44:30,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:30,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778756156] [2020-07-07 11:44:30,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:31,925 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:44:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:32,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778756156] [2020-07-07 11:44:32,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:32,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:44:32,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419171176] [2020-07-07 11:44:32,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:44:32,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:44:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:32,032 INFO L87 Difference]: Start difference. First operand 13348 states and 20240 transitions. Second operand 5 states. [2020-07-07 11:44:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:38,775 INFO L93 Difference]: Finished difference Result 30452 states and 45989 transitions. [2020-07-07 11:44:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:38,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-07 11:44:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:38,806 INFO L225 Difference]: With dead ends: 30452 [2020-07-07 11:44:38,806 INFO L226 Difference]: Without dead ends: 15894 [2020-07-07 11:44:38,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:44:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2020-07-07 11:44:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 15892. [2020-07-07 11:44:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15892 states. [2020-07-07 11:44:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15892 states to 15892 states and 23961 transitions. [2020-07-07 11:44:40,199 INFO L78 Accepts]: Start accepts. Automaton has 15892 states and 23961 transitions. Word has length 330 [2020-07-07 11:44:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:40,200 INFO L479 AbstractCegarLoop]: Abstraction has 15892 states and 23961 transitions. [2020-07-07 11:44:40,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:44:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 15892 states and 23961 transitions. [2020-07-07 11:44:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:44:40,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:40,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:40,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:44:40,220 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1136318819, now seen corresponding path program 1 times [2020-07-07 11:44:40,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:40,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347153837] [2020-07-07 11:44:40,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:41,168 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:44:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:41,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347153837] [2020-07-07 11:44:41,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:41,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:44:41,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238423771] [2020-07-07 11:44:41,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:44:41,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:44:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:41,290 INFO L87 Difference]: Start difference. First operand 15892 states and 23961 transitions. Second operand 5 states. [2020-07-07 11:44:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:51,324 INFO L93 Difference]: Finished difference Result 41545 states and 62089 transitions. [2020-07-07 11:44:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:51,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-07 11:44:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:51,361 INFO L225 Difference]: With dead ends: 41545 [2020-07-07 11:44:51,361 INFO L226 Difference]: Without dead ends: 27789 [2020-07-07 11:44:51,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:44:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27789 states. [2020-07-07 11:44:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27789 to 16491. [2020-07-07 11:44:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16491 states. [2020-07-07 11:44:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16491 states to 16491 states and 24849 transitions. [2020-07-07 11:44:52,292 INFO L78 Accepts]: Start accepts. Automaton has 16491 states and 24849 transitions. Word has length 330 [2020-07-07 11:44:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:52,292 INFO L479 AbstractCegarLoop]: Abstraction has 16491 states and 24849 transitions. [2020-07-07 11:44:52,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:44:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 16491 states and 24849 transitions. [2020-07-07 11:44:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:44:52,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:52,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:52,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:44:52,312 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-07 11:44:52,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:52,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145471150] [2020-07-07 11:44:52,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:52,984 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:44:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:53,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145471150] [2020-07-07 11:44:53,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:53,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:53,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819128063] [2020-07-07 11:44:53,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:53,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:53,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:53,087 INFO L87 Difference]: Start difference. First operand 16491 states and 24849 transitions. Second operand 4 states. [2020-07-07 11:45:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:00,304 INFO L93 Difference]: Finished difference Result 30491 states and 46183 transitions. [2020-07-07 11:45:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:45:00,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:45:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:00,324 INFO L225 Difference]: With dead ends: 30491 [2020-07-07 11:45:00,324 INFO L226 Difference]: Without dead ends: 20989 [2020-07-07 11:45:00,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2020-07-07 11:45:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 18395. [2020-07-07 11:45:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18395 states. [2020-07-07 11:45:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 27871 transitions. [2020-07-07 11:45:01,097 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 27871 transitions. Word has length 330 [2020-07-07 11:45:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:01,098 INFO L479 AbstractCegarLoop]: Abstraction has 18395 states and 27871 transitions. [2020-07-07 11:45:01,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 27871 transitions. [2020-07-07 11:45:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:45:01,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:01,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:01,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:45:01,115 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:01,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-07 11:45:01,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:01,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433362597] [2020-07-07 11:45:01,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:01,898 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:45:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:01,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433362597] [2020-07-07 11:45:01,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:01,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:01,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059598097] [2020-07-07 11:45:01,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:01,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:01,988 INFO L87 Difference]: Start difference. First operand 18395 states and 27871 transitions. Second operand 4 states. [2020-07-07 11:45:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:09,303 INFO L93 Difference]: Finished difference Result 33823 states and 51649 transitions. [2020-07-07 11:45:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:45:09,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-07 11:45:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:09,327 INFO L225 Difference]: With dead ends: 33823 [2020-07-07 11:45:09,327 INFO L226 Difference]: Without dead ends: 23821 [2020-07-07 11:45:09,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23821 states. [2020-07-07 11:45:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23821 to 21819. [2020-07-07 11:45:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21819 states. [2020-07-07 11:45:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21819 states to 21819 states and 33359 transitions. [2020-07-07 11:45:10,327 INFO L78 Accepts]: Start accepts. Automaton has 21819 states and 33359 transitions. Word has length 332 [2020-07-07 11:45:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:10,328 INFO L479 AbstractCegarLoop]: Abstraction has 21819 states and 33359 transitions. [2020-07-07 11:45:10,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 21819 states and 33359 transitions. [2020-07-07 11:45:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:45:10,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:10,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:10,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:45:10,342 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2033012311, now seen corresponding path program 1 times [2020-07-07 11:45:10,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:10,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288042566] [2020-07-07 11:45:10,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:11,155 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:45:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:11,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288042566] [2020-07-07 11:45:11,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:11,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:11,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751364916] [2020-07-07 11:45:11,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:11,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:11,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:11,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:11,223 INFO L87 Difference]: Start difference. First operand 21819 states and 33359 transitions. Second operand 4 states. [2020-07-07 11:45:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:21,554 INFO L93 Difference]: Finished difference Result 59507 states and 90499 transitions. [2020-07-07 11:45:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:45:21,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-07 11:45:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:21,605 INFO L225 Difference]: With dead ends: 59507 [2020-07-07 11:45:21,605 INFO L226 Difference]: Without dead ends: 40395 [2020-07-07 11:45:21,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40395 states. [2020-07-07 11:45:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40395 to 22147. [2020-07-07 11:45:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22147 states. [2020-07-07 11:45:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22147 states to 22147 states and 33797 transitions. [2020-07-07 11:45:22,904 INFO L78 Accepts]: Start accepts. Automaton has 22147 states and 33797 transitions. Word has length 332 [2020-07-07 11:45:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:22,904 INFO L479 AbstractCegarLoop]: Abstraction has 22147 states and 33797 transitions. [2020-07-07 11:45:22,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 22147 states and 33797 transitions. [2020-07-07 11:45:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-07 11:45:22,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:22,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:22,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:45:22,922 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash -273553115, now seen corresponding path program 1 times [2020-07-07 11:45:22,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:22,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136069229] [2020-07-07 11:45:22,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:23,562 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:45:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:23,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136069229] [2020-07-07 11:45:23,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:23,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:23,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169829349] [2020-07-07 11:45:23,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:23,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:23,663 INFO L87 Difference]: Start difference. First operand 22147 states and 33797 transitions. Second operand 4 states. [2020-07-07 11:45:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:34,541 INFO L93 Difference]: Finished difference Result 59783 states and 90773 transitions. [2020-07-07 11:45:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:45:34,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-07 11:45:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:34,590 INFO L225 Difference]: With dead ends: 59783 [2020-07-07 11:45:34,590 INFO L226 Difference]: Without dead ends: 40691 [2020-07-07 11:45:34,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2020-07-07 11:45:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 22475. [2020-07-07 11:45:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22475 states. [2020-07-07 11:45:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22475 states to 22475 states and 34165 transitions. [2020-07-07 11:45:36,032 INFO L78 Accepts]: Start accepts. Automaton has 22475 states and 34165 transitions. Word has length 333 [2020-07-07 11:45:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:36,034 INFO L479 AbstractCegarLoop]: Abstraction has 22475 states and 34165 transitions. [2020-07-07 11:45:36,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 22475 states and 34165 transitions. [2020-07-07 11:45:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-07 11:45:36,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:36,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:36,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:45:36,055 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1275140562, now seen corresponding path program 1 times [2020-07-07 11:45:36,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:36,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565384913] [2020-07-07 11:45:36,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:37,127 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:45:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:37,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565384913] [2020-07-07 11:45:37,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:37,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 11:45:37,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301001418] [2020-07-07 11:45:37,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:45:37,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:37,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:45:37,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:45:37,305 INFO L87 Difference]: Start difference. First operand 22475 states and 34165 transitions. Second operand 11 states. [2020-07-07 11:45:37,927 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-07 11:45:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:48,947 INFO L93 Difference]: Finished difference Result 65989 states and 102088 transitions. [2020-07-07 11:45:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:45:48,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 333 [2020-07-07 11:45:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:49,012 INFO L225 Difference]: With dead ends: 65989 [2020-07-07 11:45:49,012 INFO L226 Difference]: Without dead ends: 51735 [2020-07-07 11:45:49,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:45:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51735 states. [2020-07-07 11:45:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51735 to 41573. [2020-07-07 11:45:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41573 states. [2020-07-07 11:45:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41573 states to 41573 states and 63357 transitions. [2020-07-07 11:45:51,714 INFO L78 Accepts]: Start accepts. Automaton has 41573 states and 63357 transitions. Word has length 333 [2020-07-07 11:45:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:51,714 INFO L479 AbstractCegarLoop]: Abstraction has 41573 states and 63357 transitions. [2020-07-07 11:45:51,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:45:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41573 states and 63357 transitions. [2020-07-07 11:45:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-07 11:45:51,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:51,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:51,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:45:51,735 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:51,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-07 11:45:51,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:51,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369438088] [2020-07-07 11:45:51,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:52,606 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:45:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:52,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369438088] [2020-07-07 11:45:52,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:52,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:45:52,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684761957] [2020-07-07 11:45:52,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:45:52,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:52,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:45:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:52,759 INFO L87 Difference]: Start difference. First operand 41573 states and 63357 transitions. Second operand 5 states. [2020-07-07 11:45:53,366 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-07-07 11:46:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:02,758 INFO L93 Difference]: Finished difference Result 70055 states and 109281 transitions. [2020-07-07 11:46:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:46:02,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-07 11:46:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:02,810 INFO L225 Difference]: With dead ends: 70055 [2020-07-07 11:46:02,811 INFO L226 Difference]: Without dead ends: 49391 [2020-07-07 11:46:02,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:46:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49391 states. [2020-07-07 11:46:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49391 to 49389. [2020-07-07 11:46:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49389 states. [2020-07-07 11:46:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49389 states to 49389 states and 75753 transitions. [2020-07-07 11:46:05,940 INFO L78 Accepts]: Start accepts. Automaton has 49389 states and 75753 transitions. Word has length 333 [2020-07-07 11:46:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:05,940 INFO L479 AbstractCegarLoop]: Abstraction has 49389 states and 75753 transitions. [2020-07-07 11:46:05,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:46:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 49389 states and 75753 transitions. [2020-07-07 11:46:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-07 11:46:05,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:05,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:46:05,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:46:05,959 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:05,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-07 11:46:05,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:05,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291301236] [2020-07-07 11:46:05,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:06,851 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:46:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:06,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291301236] [2020-07-07 11:46:06,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:06,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:46:06,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358083819] [2020-07-07 11:46:06,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:46:06,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:46:06,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:46:06,987 INFO L87 Difference]: Start difference. First operand 49389 states and 75753 transitions. Second operand 5 states. [2020-07-07 11:46:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:22,899 INFO L93 Difference]: Finished difference Result 144252 states and 220978 transitions. [2020-07-07 11:46:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:46:22,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-07 11:46:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:23,003 INFO L225 Difference]: With dead ends: 144252 [2020-07-07 11:46:23,004 INFO L226 Difference]: Without dead ends: 95694 [2020-07-07 11:46:23,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:46:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-07-07 11:46:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 95692. [2020-07-07 11:46:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95692 states. [2020-07-07 11:46:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95692 states to 95692 states and 145852 transitions. [2020-07-07 11:46:29,392 INFO L78 Accepts]: Start accepts. Automaton has 95692 states and 145852 transitions. Word has length 333 [2020-07-07 11:46:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:29,393 INFO L479 AbstractCegarLoop]: Abstraction has 95692 states and 145852 transitions. [2020-07-07 11:46:29,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:46:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 95692 states and 145852 transitions. [2020-07-07 11:46:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:46:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:29,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:46:29,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:46:29,431 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1968714646, now seen corresponding path program 1 times [2020-07-07 11:46:29,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:29,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460421347] [2020-07-07 11:46:29,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:31,774 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:46:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:31,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460421347] [2020-07-07 11:46:31,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:31,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:46:31,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906911465] [2020-07-07 11:46:31,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:46:31,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:46:31,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:46:31,855 INFO L87 Difference]: Start difference. First operand 95692 states and 145852 transitions. Second operand 5 states. [2020-07-07 11:46:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:46,570 INFO L93 Difference]: Finished difference Result 137921 states and 210173 transitions. [2020-07-07 11:46:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:46:46,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-07 11:46:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:46,696 INFO L225 Difference]: With dead ends: 137921 [2020-07-07 11:46:46,696 INFO L226 Difference]: Without dead ends: 95694 [2020-07-07 11:46:46,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:46:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-07-07 11:46:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 91406. [2020-07-07 11:46:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91406 states. [2020-07-07 11:46:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91406 states to 91406 states and 139668 transitions. [2020-07-07 11:46:53,703 INFO L78 Accepts]: Start accepts. Automaton has 91406 states and 139668 transitions. Word has length 334 [2020-07-07 11:46:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:53,703 INFO L479 AbstractCegarLoop]: Abstraction has 91406 states and 139668 transitions. [2020-07-07 11:46:53,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:46:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 91406 states and 139668 transitions. [2020-07-07 11:46:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-07 11:46:53,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:53,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:46:53,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 11:46:53,741 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1241415225, now seen corresponding path program 1 times [2020-07-07 11:46:53,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:53,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300211106] [2020-07-07 11:46:53,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:54,408 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:46:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:54,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300211106] [2020-07-07 11:46:54,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:54,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:54,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241203938] [2020-07-07 11:46:54,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:54,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:54,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:54,490 INFO L87 Difference]: Start difference. First operand 91406 states and 139668 transitions. Second operand 4 states. [2020-07-07 11:47:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:18,008 INFO L93 Difference]: Finished difference Result 270320 states and 412826 transitions. [2020-07-07 11:47:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:18,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-07 11:47:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:18,271 INFO L225 Difference]: With dead ends: 270320 [2020-07-07 11:47:18,271 INFO L226 Difference]: Without dead ends: 180528 [2020-07-07 11:47:18,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180528 states. [2020-07-07 11:47:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180528 to 91750. [2020-07-07 11:47:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91750 states. [2020-07-07 11:47:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91750 states to 91750 states and 140036 transitions. [2020-07-07 11:47:28,391 INFO L78 Accepts]: Start accepts. Automaton has 91750 states and 140036 transitions. Word has length 337 [2020-07-07 11:47:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:28,391 INFO L479 AbstractCegarLoop]: Abstraction has 91750 states and 140036 transitions. [2020-07-07 11:47:28,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 91750 states and 140036 transitions. [2020-07-07 11:47:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-07 11:47:28,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:28,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:47:28,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 11:47:28,426 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1683426062, now seen corresponding path program 1 times [2020-07-07 11:47:28,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:28,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058921244] [2020-07-07 11:47:28,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:29,092 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:47:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:29,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058921244] [2020-07-07 11:47:29,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:29,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:29,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938368696] [2020-07-07 11:47:29,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:29,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:29,198 INFO L87 Difference]: Start difference. First operand 91750 states and 140036 transitions. Second operand 4 states. [2020-07-07 11:47:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:52,422 INFO L93 Difference]: Finished difference Result 264309 states and 403517 transitions. [2020-07-07 11:47:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:52,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-07 11:47:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:52,661 INFO L225 Difference]: With dead ends: 264309 [2020-07-07 11:47:52,661 INFO L226 Difference]: Without dead ends: 177799 [2020-07-07 11:47:52,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177799 states. [2020-07-07 11:48:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177799 to 177797. [2020-07-07 11:48:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177797 states. [2020-07-07 11:48:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177797 states to 177797 states and 270305 transitions. [2020-07-07 11:48:12,172 INFO L78 Accepts]: Start accepts. Automaton has 177797 states and 270305 transitions. Word has length 337 [2020-07-07 11:48:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:12,172 INFO L479 AbstractCegarLoop]: Abstraction has 177797 states and 270305 transitions. [2020-07-07 11:48:12,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 177797 states and 270305 transitions. [2020-07-07 11:48:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 11:48:12,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:12,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:48:12,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 11:48:12,248 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1966579330, now seen corresponding path program 1 times [2020-07-07 11:48:12,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:12,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331811800] [2020-07-07 11:48:12,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:12,922 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:48:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:13,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331811800] [2020-07-07 11:48:13,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:13,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:13,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540031651] [2020-07-07 11:48:13,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:13,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:13,035 INFO L87 Difference]: Start difference. First operand 177797 states and 270305 transitions. Second operand 4 states. [2020-07-07 11:48:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:53,461 INFO L93 Difference]: Finished difference Result 512409 states and 777349 transitions. [2020-07-07 11:48:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:53,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-07 11:48:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:54,172 INFO L225 Difference]: With dead ends: 512409 [2020-07-07 11:48:54,173 INFO L226 Difference]: Without dead ends: 337394 [2020-07-07 11:48:54,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337394 states. [2020-07-07 11:49:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337394 to 337392. [2020-07-07 11:49:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337392 states. [2020-07-07 11:49:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337392 states to 337392 states and 507965 transitions. [2020-07-07 11:49:25,944 INFO L78 Accepts]: Start accepts. Automaton has 337392 states and 507965 transitions. Word has length 339 [2020-07-07 11:49:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:25,944 INFO L479 AbstractCegarLoop]: Abstraction has 337392 states and 507965 transitions. [2020-07-07 11:49:25,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:49:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 337392 states and 507965 transitions. [2020-07-07 11:49:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 11:49:26,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:26,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:49:26,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:49:26,079 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:26,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1882657510, now seen corresponding path program 1 times [2020-07-07 11:49:26,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:26,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358397543] [2020-07-07 11:49:26,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:27,661 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:49:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:49:27,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358397543] [2020-07-07 11:49:27,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:27,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:49:27,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135250869] [2020-07-07 11:49:27,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:49:27,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:49:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:49:27,786 INFO L87 Difference]: Start difference. First operand 337392 states and 507965 transitions. Second operand 5 states. [2020-07-07 11:50:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:50:15,652 INFO L93 Difference]: Finished difference Result 699505 states and 1050397 transitions. [2020-07-07 11:50:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:50:15,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-07 11:50:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:50:16,193 INFO L225 Difference]: With dead ends: 699505 [2020-07-07 11:50:16,193 INFO L226 Difference]: Without dead ends: 352215 [2020-07-07 11:50:16,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:50:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352215 states. [2020-07-07 11:50:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352215 to 352213. [2020-07-07 11:50:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352213 states. [2020-07-07 11:50:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352213 states to 352213 states and 526237 transitions. [2020-07-07 11:50:53,926 INFO L78 Accepts]: Start accepts. Automaton has 352213 states and 526237 transitions. Word has length 339 [2020-07-07 11:50:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:50:53,926 INFO L479 AbstractCegarLoop]: Abstraction has 352213 states and 526237 transitions. [2020-07-07 11:50:53,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:50:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 352213 states and 526237 transitions. [2020-07-07 11:50:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-07 11:50:54,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:50:54,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:50:54,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 11:50:54,071 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:50:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:50:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1719490276, now seen corresponding path program 1 times [2020-07-07 11:50:54,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:50:54,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639009164] [2020-07-07 11:50:54,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:50:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:54,770 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:50:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:50:54,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639009164] [2020-07-07 11:50:54,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:50:54,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:50:54,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301592007] [2020-07-07 11:50:54,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:50:54,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:50:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:50:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:50:54,859 INFO L87 Difference]: Start difference. First operand 352213 states and 526237 transitions. Second operand 4 states. [2020-07-07 11:51:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:51:59,336 INFO L93 Difference]: Finished difference Result 846681 states and 1282567 transitions. [2020-07-07 11:51:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:51:59,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-07 11:51:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:00,240 INFO L225 Difference]: With dead ends: 846681 [2020-07-07 11:52:00,240 INFO L226 Difference]: Without dead ends: 557571 [2020-07-07 11:52:00,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557571 states. [2020-07-07 11:53:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557571 to 514081. [2020-07-07 11:53:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514081 states. [2020-07-07 11:53:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514081 states to 514081 states and 776541 transitions. [2020-07-07 11:53:06,670 INFO L78 Accepts]: Start accepts. Automaton has 514081 states and 776541 transitions. Word has length 340 [2020-07-07 11:53:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:53:06,670 INFO L479 AbstractCegarLoop]: Abstraction has 514081 states and 776541 transitions. [2020-07-07 11:53:06,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:53:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 514081 states and 776541 transitions. [2020-07-07 11:53:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-07 11:53:06,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:53:06,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:53:06,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 11:53:06,848 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:53:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:53:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash 989201276, now seen corresponding path program 1 times [2020-07-07 11:53:06,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:53:06,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636016455] [2020-07-07 11:53:06,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:53:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:07,492 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:53:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:53:07,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636016455] [2020-07-07 11:53:07,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:53:07,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:53:07,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658999530] [2020-07-07 11:53:07,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:53:07,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:53:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:53:07,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:53:07,562 INFO L87 Difference]: Start difference. First operand 514081 states and 776541 transitions. Second operand 4 states. [2020-07-07 11:55:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:55:04,371 INFO L93 Difference]: Finished difference Result 1513801 states and 2288443 transitions. [2020-07-07 11:55:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:55:04,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-07 11:55:04,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:55:05,922 INFO L225 Difference]: With dead ends: 1513801 [2020-07-07 11:55:05,923 INFO L226 Difference]: Without dead ends: 1018563 [2020-07-07 11:55:06,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:55:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018563 states.