/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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:54:10,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:54:10,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:54:10,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:54:10,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:54:10,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:54:10,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:54:10,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:54:10,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:54:10,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:54:10,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:54:10,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:54:10,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:54:10,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:54:10,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:54:10,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:54:10,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:54:10,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:54:10,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:54:10,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:54:10,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:54:10,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:54:10,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:54:10,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:54:10,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:54:10,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:54:10,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:54:10,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:54:10,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:54:10,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:54:10,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:54:10,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:54:10,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:54:10,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:54:10,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:54:10,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:54:10,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:54:10,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:54:10,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:54:10,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:54:10,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:54:10,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:54:10,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:54:10,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:54:10,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:54:10,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:54:10,282 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:54:10,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:54:10,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:54:10,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:54:10,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:54:10,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:54:10,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:54:10,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:54:10,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:54:10,284 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:54:10,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:54:10,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:54:10,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:54:10,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:54:10,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:54:10,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:54:10,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:54:10,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:54:10,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:54:10,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:54:10,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:54:10,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:54:10,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:54:10,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:54:10,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:54:10,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:54:10,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:54:10,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:54:10,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:54:10,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:54:10,749 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:54:10,750 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-04 13:54:10,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/628c8b086/19145e0f8d204e57ba3a157d8fe9decf/FLAG67f16f1c3 [2020-09-04 13:54:11,591 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:54:11,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-04 13:54:11,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/628c8b086/19145e0f8d204e57ba3a157d8fe9decf/FLAG67f16f1c3 [2020-09-04 13:54:11,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/628c8b086/19145e0f8d204e57ba3a157d8fe9decf [2020-09-04 13:54:11,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:54:11,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:54:11,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:54:11,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:54:11,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:54:11,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:54:11" (1/1) ... [2020-09-04 13:54:11,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3bc46a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:11, skipping insertion in model container [2020-09-04 13:54:11,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:54:11" (1/1) ... [2020-09-04 13:54:11,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:54:11,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:54:13,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:54:13,312 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:54:14,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:54:14,929 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:54:14,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14 WrapperNode [2020-09-04 13:54:14,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:54:14,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:54:14,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:54:14,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:54:14,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:14,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:15,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:15,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:15,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:15,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:15,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... [2020-09-04 13:54:15,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:54:15,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:54:15,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:54:15,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:54:15,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:54:15,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:54:15,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:54:15,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:54:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:54:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:54:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 13:54:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 13:54:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 13:54:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:54:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:54:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 13:54:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 13:54:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 13:54:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 13:54:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 13:54:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 13:54:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-04 13:54:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 13:54:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 13:54:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:54:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:54:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:54:18,770 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:54:18,770 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:54:18,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:54:18 BoogieIcfgContainer [2020-09-04 13:54:18,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:54:18,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:54:18,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:54:18,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:54:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:54:11" (1/3) ... [2020-09-04 13:54:18,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a72de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:54:18, skipping insertion in model container [2020-09-04 13:54:18,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:54:14" (2/3) ... [2020-09-04 13:54:18,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a72de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:54:18, skipping insertion in model container [2020-09-04 13:54:18,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:54:18" (3/3) ... [2020-09-04 13:54:18,795 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-04 13:54:18,807 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:54:18,817 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:54:18,840 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:54:18,877 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:54:18,877 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:54:18,877 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:54:18,877 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:54:18,878 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:54:18,878 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:54:18,878 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:54:18,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:54:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-09-04 13:54:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-04 13:54:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:54:18,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:54:18,969 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:54:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:54:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-09-04 13:54:18,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:54:18,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939953740] [2020-09-04 13:54:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:54:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:54:21,759 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:54:21,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:54:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:54:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:54:22,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939953740] [2020-09-04 13:54:22,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:54:22,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:54:22,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780801899] [2020-09-04 13:54:22,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:54:22,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:54:22,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:54:22,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:54:22,077 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-09-04 13:54:23,044 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 389 [2020-09-04 13:54:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:54:32,614 INFO L93 Difference]: Finished difference Result 2212 states and 3947 transitions. [2020-09-04 13:54:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:54:32,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-09-04 13:54:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:54:32,659 INFO L225 Difference]: With dead ends: 2212 [2020-09-04 13:54:32,660 INFO L226 Difference]: Without dead ends: 1956 [2020-09-04 13:54:32,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:54:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-09-04 13:54:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1954. [2020-09-04 13:54:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2020-09-04 13:54:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3183 transitions. [2020-09-04 13:54:32,846 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3183 transitions. Word has length 467 [2020-09-04 13:54:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:54:32,848 INFO L479 AbstractCegarLoop]: Abstraction has 1954 states and 3183 transitions. [2020-09-04 13:54:32,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:54:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3183 transitions. [2020-09-04 13:54:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-04 13:54:32,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:54:32,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:54:32,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:54:32,861 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:54:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:54:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-09-04 13:54:32,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:54:32,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752484923] [2020-09-04 13:54:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:54:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:54:36,065 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:54:36,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:54:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:54:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:54:36,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752484923] [2020-09-04 13:54:36,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:54:36,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:54:36,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494243712] [2020-09-04 13:54:36,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:54:36,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:54:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:54:36,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:54:36,519 INFO L87 Difference]: Start difference. First operand 1954 states and 3183 transitions. Second operand 5 states. [2020-09-04 13:54:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:54:50,619 INFO L93 Difference]: Finished difference Result 5793 states and 9438 transitions. [2020-09-04 13:54:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:54:50,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2020-09-04 13:54:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:54:50,642 INFO L225 Difference]: With dead ends: 5793 [2020-09-04 13:54:50,642 INFO L226 Difference]: Without dead ends: 3856 [2020-09-04 13:54:50,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:54:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2020-09-04 13:54:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 3854. [2020-09-04 13:54:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3854 states. [2020-09-04 13:54:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6254 transitions. [2020-09-04 13:54:50,804 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6254 transitions. Word has length 467 [2020-09-04 13:54:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:54:50,805 INFO L479 AbstractCegarLoop]: Abstraction has 3854 states and 6254 transitions. [2020-09-04 13:54:50,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:54:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6254 transitions. [2020-09-04 13:54:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-09-04 13:54:50,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:54:50,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:54:50,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:54:50,822 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:54:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:54:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-09-04 13:54:50,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:54:50,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296065478] [2020-09-04 13:54:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:54:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:54:52,214 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:54:52,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:54:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:54:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:54:52,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296065478] [2020-09-04 13:54:52,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:54:52,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:54:52,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381339897] [2020-09-04 13:54:52,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:54:52,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:54:52,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:54:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:54:52,569 INFO L87 Difference]: Start difference. First operand 3854 states and 6254 transitions. Second operand 4 states. [2020-09-04 13:55:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:55:09,173 INFO L93 Difference]: Finished difference Result 11260 states and 18231 transitions. [2020-09-04 13:55:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:55:09,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-09-04 13:55:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:55:09,208 INFO L225 Difference]: With dead ends: 11260 [2020-09-04 13:55:09,208 INFO L226 Difference]: Without dead ends: 7620 [2020-09-04 13:55:09,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:55:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2020-09-04 13:55:09,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 7618. [2020-09-04 13:55:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2020-09-04 13:55:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 12321 transitions. [2020-09-04 13:55:09,497 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 12321 transitions. Word has length 469 [2020-09-04 13:55:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:55:09,497 INFO L479 AbstractCegarLoop]: Abstraction has 7618 states and 12321 transitions. [2020-09-04 13:55:09,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:55:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 12321 transitions. [2020-09-04 13:55:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-04 13:55:09,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:55:09,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:55:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:55:09,523 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:55:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:55:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-09-04 13:55:09,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:55:09,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869309687] [2020-09-04 13:55:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:55:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:55:10,540 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:55:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:55:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:55:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:55:10,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869309687] [2020-09-04 13:55:10,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:55:10,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:55:10,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265796665] [2020-09-04 13:55:10,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:55:10,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:55:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:55:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:55:10,785 INFO L87 Difference]: Start difference. First operand 7618 states and 12321 transitions. Second operand 4 states. [2020-09-04 13:55:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:55:27,624 INFO L93 Difference]: Finished difference Result 22757 states and 36795 transitions. [2020-09-04 13:55:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:55:27,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-09-04 13:55:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:55:27,683 INFO L225 Difference]: With dead ends: 22757 [2020-09-04 13:55:27,683 INFO L226 Difference]: Without dead ends: 15191 [2020-09-04 13:55:27,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:55:27,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2020-09-04 13:55:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 7665. [2020-09-04 13:55:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2020-09-04 13:55:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 12395 transitions. [2020-09-04 13:55:28,073 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 12395 transitions. Word has length 470 [2020-09-04 13:55:28,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:55:28,074 INFO L479 AbstractCegarLoop]: Abstraction has 7665 states and 12395 transitions. [2020-09-04 13:55:28,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:55:28,074 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 12395 transitions. [2020-09-04 13:55:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-09-04 13:55:28,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:55:28,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:55:28,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:55:28,102 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:55:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:55:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-09-04 13:55:28,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:55:28,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52943190] [2020-09-04 13:55:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:55:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:55:29,589 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:55:29,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:55:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:55:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:55:29,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52943190] [2020-09-04 13:55:29,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:55:29,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:55:29,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706449285] [2020-09-04 13:55:29,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:55:29,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:55:29,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:55:29,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:55:29,943 INFO L87 Difference]: Start difference. First operand 7665 states and 12395 transitions. Second operand 4 states. [2020-09-04 13:55:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:55:47,100 INFO L93 Difference]: Finished difference Result 22272 states and 35912 transitions. [2020-09-04 13:55:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:55:47,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-09-04 13:55:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:55:47,134 INFO L225 Difference]: With dead ends: 22272 [2020-09-04 13:55:47,134 INFO L226 Difference]: Without dead ends: 15006 [2020-09-04 13:55:47,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:55:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15006 states. [2020-09-04 13:55:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15006 to 15004. [2020-09-04 13:55:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-09-04 13:55:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 24145 transitions. [2020-09-04 13:55:47,792 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 24145 transitions. Word has length 471 [2020-09-04 13:55:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:55:47,793 INFO L479 AbstractCegarLoop]: Abstraction has 15004 states and 24145 transitions. [2020-09-04 13:55:47,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:55:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 24145 transitions. [2020-09-04 13:55:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-09-04 13:55:47,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:55:47,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:55:47,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 13:55:47,823 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:55:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:55:47,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-09-04 13:55:47,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:55:47,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392739446] [2020-09-04 13:55:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:55:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:55:48,888 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:55:48,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:55:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:55:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:55:49,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392739446] [2020-09-04 13:55:49,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:55:49,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:55:49,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209941122] [2020-09-04 13:55:49,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:55:49,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:55:49,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:55:49,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:55:49,104 INFO L87 Difference]: Start difference. First operand 15004 states and 24145 transitions. Second operand 4 states. [2020-09-04 13:56:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:56:07,250 INFO L93 Difference]: Finished difference Result 44756 states and 71990 transitions. [2020-09-04 13:56:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:56:07,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-09-04 13:56:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:56:07,294 INFO L225 Difference]: With dead ends: 44756 [2020-09-04 13:56:07,294 INFO L226 Difference]: Without dead ends: 29896 [2020-09-04 13:56:07,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:56:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-09-04 13:56:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 15102. [2020-09-04 13:56:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15102 states. [2020-09-04 13:56:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15102 states to 15102 states and 24296 transitions. [2020-09-04 13:56:08,064 INFO L78 Accepts]: Start accepts. Automaton has 15102 states and 24296 transitions. Word has length 471 [2020-09-04 13:56:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:56:08,065 INFO L479 AbstractCegarLoop]: Abstraction has 15102 states and 24296 transitions. [2020-09-04 13:56:08,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:56:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15102 states and 24296 transitions. [2020-09-04 13:56:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-09-04 13:56:08,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:56:08,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:56:08,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 13:56:08,093 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:56:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:56:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2067493155, now seen corresponding path program 1 times [2020-09-04 13:56:08,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:56:08,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537777923] [2020-09-04 13:56:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:56:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:56:09,176 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:56:09,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:56:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:56:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:56:09,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537777923] [2020-09-04 13:56:09,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:56:09,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:56:09,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941165053] [2020-09-04 13:56:09,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:56:09,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:56:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:56:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:56:09,382 INFO L87 Difference]: Start difference. First operand 15102 states and 24296 transitions. Second operand 4 states. [2020-09-04 13:56:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:56:27,984 INFO L93 Difference]: Finished difference Result 44891 states and 72171 transitions. [2020-09-04 13:56:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:56:27,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-09-04 13:56:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:56:28,023 INFO L225 Difference]: With dead ends: 44891 [2020-09-04 13:56:28,023 INFO L226 Difference]: Without dead ends: 30013 [2020-09-04 13:56:28,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:56:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30013 states. [2020-09-04 13:56:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30013 to 15219. [2020-09-04 13:56:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15219 states. [2020-09-04 13:56:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 24442 transitions. [2020-09-04 13:56:28,719 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 24442 transitions. Word has length 472 [2020-09-04 13:56:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:56:28,719 INFO L479 AbstractCegarLoop]: Abstraction has 15219 states and 24442 transitions. [2020-09-04 13:56:28,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:56:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 24442 transitions. [2020-09-04 13:56:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-09-04 13:56:28,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:56:28,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:56:28,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 13:56:28,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:56:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:56:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-09-04 13:56:28,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:56:28,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730305431] [2020-09-04 13:56:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:56:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:56:30,251 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:56:30,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:56:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:56:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:56:30,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730305431] [2020-09-04 13:56:30,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:56:30,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:56:30,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434935806] [2020-09-04 13:56:30,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:56:30,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:56:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:56:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:56:30,503 INFO L87 Difference]: Start difference. First operand 15219 states and 24442 transitions. Second operand 4 states. [2020-09-04 13:56:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:56:49,327 INFO L93 Difference]: Finished difference Result 43846 states and 70265 transitions. [2020-09-04 13:56:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:56:49,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-09-04 13:56:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:56:49,358 INFO L225 Difference]: With dead ends: 43846 [2020-09-04 13:56:49,358 INFO L226 Difference]: Without dead ends: 29596 [2020-09-04 13:56:49,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:56:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29596 states. [2020-09-04 13:56:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29596 to 29594. [2020-09-04 13:56:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29594 states. [2020-09-04 13:56:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29594 states to 29594 states and 47307 transitions. [2020-09-04 13:56:50,352 INFO L78 Accepts]: Start accepts. Automaton has 29594 states and 47307 transitions. Word has length 473 [2020-09-04 13:56:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:56:50,353 INFO L479 AbstractCegarLoop]: Abstraction has 29594 states and 47307 transitions. [2020-09-04 13:56:50,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:56:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 29594 states and 47307 transitions. [2020-09-04 13:56:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-09-04 13:56:50,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:56:50,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:56:50,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 13:56:50,381 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:56:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:56:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash -382866648, now seen corresponding path program 1 times [2020-09-04 13:56:50,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:56:50,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941829664] [2020-09-04 13:56:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:56:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:56:52,884 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:56:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:56:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:56:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:56:53,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941829664] [2020-09-04 13:56:53,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:56:53,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:56:53,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124463848] [2020-09-04 13:56:53,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:56:53,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:56:53,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:56:53,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:56:53,084 INFO L87 Difference]: Start difference. First operand 29594 states and 47307 transitions. Second operand 5 states. [2020-09-04 13:57:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:57:08,762 INFO L93 Difference]: Finished difference Result 66734 states and 107426 transitions. [2020-09-04 13:57:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:57:08,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-09-04 13:57:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:57:08,797 INFO L225 Difference]: With dead ends: 66734 [2020-09-04 13:57:08,797 INFO L226 Difference]: Without dead ends: 33950 [2020-09-04 13:57:08,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:57:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33950 states. [2020-09-04 13:57:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33950 to 33948. [2020-09-04 13:57:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33948 states. [2020-09-04 13:57:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 54478 transitions. [2020-09-04 13:57:10,024 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 54478 transitions. Word has length 473 [2020-09-04 13:57:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:57:10,024 INFO L479 AbstractCegarLoop]: Abstraction has 33948 states and 54478 transitions. [2020-09-04 13:57:10,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:57:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 54478 transitions. [2020-09-04 13:57:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-09-04 13:57:11,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:57:11,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:57:11,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 13:57:11,414 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:57:11,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:57:11,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1863306290, now seen corresponding path program 1 times [2020-09-04 13:57:11,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:57:11,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390979827] [2020-09-04 13:57:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:57:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:57:12,803 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:57:12,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:57:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:57:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:57:13,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390979827] [2020-09-04 13:57:13,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:57:13,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:57:13,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637561406] [2020-09-04 13:57:13,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:57:13,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:57:13,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:57:13,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:57:13,052 INFO L87 Difference]: Start difference. First operand 33948 states and 54478 transitions. Second operand 4 states. [2020-09-04 13:57:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:57:34,010 INFO L93 Difference]: Finished difference Result 99741 states and 160081 transitions. [2020-09-04 13:57:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:57:34,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-09-04 13:57:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:57:34,073 INFO L225 Difference]: With dead ends: 99741 [2020-09-04 13:57:34,074 INFO L226 Difference]: Without dead ends: 66813 [2020-09-04 13:57:34,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:57:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66813 states. [2020-09-04 13:57:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66813 to 66811. [2020-09-04 13:57:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66811 states. [2020-09-04 13:57:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66811 states to 66811 states and 106807 transitions. [2020-09-04 13:57:38,207 INFO L78 Accepts]: Start accepts. Automaton has 66811 states and 106807 transitions. Word has length 475 [2020-09-04 13:57:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:57:38,207 INFO L479 AbstractCegarLoop]: Abstraction has 66811 states and 106807 transitions. [2020-09-04 13:57:38,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:57:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 66811 states and 106807 transitions. [2020-09-04 13:57:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-04 13:57:38,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:57:38,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:57:38,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 13:57:38,278 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:57:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:57:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2006098379, now seen corresponding path program 1 times [2020-09-04 13:57:38,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:57:38,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735988022] [2020-09-04 13:57:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:57:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:57:39,417 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:57:39,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:57:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:57:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:57:39,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735988022] [2020-09-04 13:57:39,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:57:39,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:57:39,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132638975] [2020-09-04 13:57:39,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:57:39,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:57:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:57:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:57:39,713 INFO L87 Difference]: Start difference. First operand 66811 states and 106807 transitions. Second operand 4 states. [2020-09-04 13:57:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:57:55,274 INFO L93 Difference]: Finished difference Result 195685 states and 312451 transitions. [2020-09-04 13:57:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:57:55,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-09-04 13:57:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:57:55,401 INFO L225 Difference]: With dead ends: 195685 [2020-09-04 13:57:55,401 INFO L226 Difference]: Without dead ends: 131267 [2020-09-04 13:57:55,446 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 [2020-09-04 13:57:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131267 states. [2020-09-04 13:57:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131267 to 67201. [2020-09-04 13:57:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67201 states. [2020-09-04 13:57:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67201 states to 67201 states and 107383 transitions. [2020-09-04 13:57:58,931 INFO L78 Accepts]: Start accepts. Automaton has 67201 states and 107383 transitions. Word has length 476 [2020-09-04 13:57:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:57:58,931 INFO L479 AbstractCegarLoop]: Abstraction has 67201 states and 107383 transitions. [2020-09-04 13:57:58,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:57:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 67201 states and 107383 transitions. [2020-09-04 13:57:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-09-04 13:57:58,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:57:58,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:57:58,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 13:57:58,984 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:57:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:57:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1105309677, now seen corresponding path program 1 times [2020-09-04 13:57:58,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:57:58,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863577751] [2020-09-04 13:57:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:57:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:00,406 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:58:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:58:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:58:00,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863577751] [2020-09-04 13:58:00,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:58:00,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:58:00,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002148802] [2020-09-04 13:58:00,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:58:00,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:58:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:58:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:58:00,869 INFO L87 Difference]: Start difference. First operand 67201 states and 107383 transitions. Second operand 4 states. [2020-09-04 13:58:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:58:26,715 INFO L93 Difference]: Finished difference Result 196551 states and 313849 transitions. [2020-09-04 13:58:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:58:26,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-09-04 13:58:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:58:26,852 INFO L225 Difference]: With dead ends: 196551 [2020-09-04 13:58:26,852 INFO L226 Difference]: Without dead ends: 132200 [2020-09-04 13:58:26,899 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 [2020-09-04 13:58:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132200 states. [2020-09-04 13:58:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132200 to 132198. [2020-09-04 13:58:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132198 states. [2020-09-04 13:58:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132198 states to 132198 states and 210404 transitions. [2020-09-04 13:58:35,995 INFO L78 Accepts]: Start accepts. Automaton has 132198 states and 210404 transitions. Word has length 477 [2020-09-04 13:58:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:58:35,996 INFO L479 AbstractCegarLoop]: Abstraction has 132198 states and 210404 transitions. [2020-09-04 13:58:35,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:58:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 132198 states and 210404 transitions. [2020-09-04 13:58:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-09-04 13:58:36,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:58:36,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:58:36,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 13:58:36,092 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:58:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:58:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1693237162, now seen corresponding path program 1 times [2020-09-04 13:58:36,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:58:36,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930053236] [2020-09-04 13:58:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:58:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:38,277 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:58:38,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:58:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:58:38,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930053236] [2020-09-04 13:58:38,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:58:38,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:58:38,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205689380] [2020-09-04 13:58:38,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:58:38,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:58:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:58:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:58:38,436 INFO L87 Difference]: Start difference. First operand 132198 states and 210404 transitions. Second operand 5 states. [2020-09-04 13:59:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:59:03,238 INFO L93 Difference]: Finished difference Result 308141 states and 493722 transitions. [2020-09-04 13:59:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:59:03,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-09-04 13:59:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:59:03,401 INFO L225 Difference]: With dead ends: 308141 [2020-09-04 13:59:03,401 INFO L226 Difference]: Without dead ends: 157667 [2020-09-04 13:59:03,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:59:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157667 states. [2020-09-04 13:59:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157667 to 157665. [2020-09-04 13:59:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157665 states. [2020-09-04 13:59:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157665 states to 157665 states and 251972 transitions. [2020-09-04 13:59:14,725 INFO L78 Accepts]: Start accepts. Automaton has 157665 states and 251972 transitions. Word has length 477 [2020-09-04 13:59:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:59:14,725 INFO L479 AbstractCegarLoop]: Abstraction has 157665 states and 251972 transitions. [2020-09-04 13:59:14,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:59:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 157665 states and 251972 transitions. [2020-09-04 13:59:14,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-09-04 13:59:14,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:59:14,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:59:14,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 13:59:14,843 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:59:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:59:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash 355992395, now seen corresponding path program 1 times [2020-09-04 13:59:14,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:59:14,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922730261] [2020-09-04 13:59:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:59:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:16,243 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:59:16,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:59:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:59:16,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922730261] [2020-09-04 13:59:16,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:59:16,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:59:16,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333958871] [2020-09-04 13:59:16,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:59:16,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:59:16,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:59:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:59:16,458 INFO L87 Difference]: Start difference. First operand 157665 states and 251972 transitions. Second operand 6 states. [2020-09-04 13:59:17,503 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-09-04 13:59:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:59:37,641 INFO L93 Difference]: Finished difference Result 244651 states and 384741 transitions. [2020-09-04 13:59:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:59:37,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 479 [2020-09-04 13:59:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:59:37,803 INFO L225 Difference]: With dead ends: 244651 [2020-09-04 13:59:37,803 INFO L226 Difference]: Without dead ends: 157665 [2020-09-04 13:59:37,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:59:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157665 states. [2020-09-04 13:59:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157665 to 157665. [2020-09-04 13:59:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157665 states. [2020-09-04 13:59:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157665 states to 157665 states and 250124 transitions. [2020-09-04 13:59:46,861 INFO L78 Accepts]: Start accepts. Automaton has 157665 states and 250124 transitions. Word has length 479 [2020-09-04 13:59:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:59:46,861 INFO L479 AbstractCegarLoop]: Abstraction has 157665 states and 250124 transitions. [2020-09-04 13:59:46,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:59:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 157665 states and 250124 transitions. [2020-09-04 13:59:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-09-04 13:59:46,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:59:46,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:59:46,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 13:59:46,974 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:59:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:59:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1017913424, now seen corresponding path program 1 times [2020-09-04 13:59:46,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:59:46,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247130095] [2020-09-04 13:59:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:59:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:49,020 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 13:59:49,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:59:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:59:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247130095] [2020-09-04 13:59:49,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:59:49,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 13:59:49,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451276153] [2020-09-04 13:59:49,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:59:49,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:59:49,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:59:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:59:49,376 INFO L87 Difference]: Start difference. First operand 157665 states and 250124 transitions. Second operand 14 states. [2020-09-04 13:59:53,695 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-09-04 14:00:00,513 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 416 DAG size of output: 413 [2020-09-04 14:00:14,173 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-09-04 14:00:16,536 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-09-04 14:00:16,730 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-09-04 14:00:16,971 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-09-04 14:00:17,189 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-09-04 14:00:22,552 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-09-04 14:00:29,016 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-09-04 14:01:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:11,638 INFO L93 Difference]: Finished difference Result 333655 states and 521833 transitions. [2020-09-04 14:01:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 14:01:11,640 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 479 [2020-09-04 14:01:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:11,932 INFO L225 Difference]: With dead ends: 333655 [2020-09-04 14:01:11,932 INFO L226 Difference]: Without dead ends: 307701 [2020-09-04 14:01:11,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 14:01:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307701 states. [2020-09-04 14:01:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307701 to 170017. [2020-09-04 14:01:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170017 states. [2020-09-04 14:01:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170017 states to 170017 states and 267964 transitions. [2020-09-04 14:01:25,205 INFO L78 Accepts]: Start accepts. Automaton has 170017 states and 267964 transitions. Word has length 479 [2020-09-04 14:01:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:25,206 INFO L479 AbstractCegarLoop]: Abstraction has 170017 states and 267964 transitions. [2020-09-04 14:01:25,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 14:01:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 170017 states and 267964 transitions. [2020-09-04 14:01:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-09-04 14:01:25,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:25,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:25,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:01:25,338 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1908068521, now seen corresponding path program 1 times [2020-09-04 14:01:25,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:25,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26341211] [2020-09-04 14:01:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:30,041 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 14:01:30,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:30,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26341211] [2020-09-04 14:01:30,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:30,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:30,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985641077] [2020-09-04 14:01:30,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:30,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:30,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:30,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:30,304 INFO L87 Difference]: Start difference. First operand 170017 states and 267964 transitions. Second operand 5 states. [2020-09-04 14:02:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:09,433 INFO L93 Difference]: Finished difference Result 495155 states and 779819 transitions. [2020-09-04 14:02:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:02:09,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-09-04 14:02:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:09,774 INFO L225 Difference]: With dead ends: 495155 [2020-09-04 14:02:09,774 INFO L226 Difference]: Without dead ends: 329340 [2020-09-04 14:02:09,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:02:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329340 states. [2020-09-04 14:02:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329340 to 329338. [2020-09-04 14:02:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329338 states. [2020-09-04 14:02:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329338 states to 329338 states and 516766 transitions. [2020-09-04 14:02:39,489 INFO L78 Accepts]: Start accepts. Automaton has 329338 states and 516766 transitions. Word has length 479 [2020-09-04 14:02:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:39,490 INFO L479 AbstractCegarLoop]: Abstraction has 329338 states and 516766 transitions. [2020-09-04 14:02:39,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:02:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 329338 states and 516766 transitions. [2020-09-04 14:02:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-09-04 14:02:39,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:39,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:39,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:02:39,762 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1487480530, now seen corresponding path program 1 times [2020-09-04 14:02:39,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:39,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365200693] [2020-09-04 14:02:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:41,321 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 14:02:41,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:41,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365200693] [2020-09-04 14:02:41,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:41,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:41,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094847087] [2020-09-04 14:02:41,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:41,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:41,476 INFO L87 Difference]: Start difference. First operand 329338 states and 516766 transitions. Second operand 5 states. [2020-09-04 14:03:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:37,333 INFO L93 Difference]: Finished difference Result 793367 states and 1251800 transitions. [2020-09-04 14:03:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:03:37,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-09-04 14:03:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:37,773 INFO L225 Difference]: With dead ends: 793367 [2020-09-04 14:03:37,773 INFO L226 Difference]: Without dead ends: 404937 [2020-09-04 14:03:37,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:03:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404937 states. [2020-09-04 14:04:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404937 to 404935. [2020-09-04 14:04:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404935 states. [2020-09-04 14:04:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404935 states to 404935 states and 637529 transitions. [2020-09-04 14:04:19,857 INFO L78 Accepts]: Start accepts. Automaton has 404935 states and 637529 transitions. Word has length 479 [2020-09-04 14:04:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:19,857 INFO L479 AbstractCegarLoop]: Abstraction has 404935 states and 637529 transitions. [2020-09-04 14:04:19,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:04:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 404935 states and 637529 transitions. [2020-09-04 14:04:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-09-04 14:04:20,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:20,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:20,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 14:04:20,212 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -920505515, now seen corresponding path program 1 times [2020-09-04 14:04:20,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:20,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030155420] [2020-09-04 14:04:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:21,811 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-09-04 14:04:21,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:04:21,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030155420] [2020-09-04 14:04:21,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:21,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:04:21,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497886902] [2020-09-04 14:04:21,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:04:21,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:04:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:04:21,992 INFO L87 Difference]: Start difference. First operand 404935 states and 637529 transitions. Second operand 5 states. [2020-09-04 14:05:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:52,300 INFO L93 Difference]: Finished difference Result 1105248 states and 1729588 transitions. [2020-09-04 14:05:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:05:52,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-09-04 14:05:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:53,118 INFO L225 Difference]: With dead ends: 1105248 [2020-09-04 14:05:53,119 INFO L226 Difference]: Without dead ends: 736110 [2020-09-04 14:05:53,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:05:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736110 states.