/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 0.1.25-72570d3 [2020-08-22 17:09:38,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:09:38,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:09:38,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:09:38,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:09:38,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:09:38,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:09:38,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:09:38,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:09:38,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:09:38,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:09:38,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:09:38,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:09:38,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:09:38,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:09:38,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:09:38,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:09:38,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:09:38,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:09:38,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:09:38,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:09:38,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:09:38,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:09:38,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:09:38,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:09:38,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 17:09:38,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 17:09:38,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 17:09:38,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 17:09:38,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 17:09:38,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 17:09:38,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 17:09:38,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 17:09:38,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:09:38,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:09:38,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:09:38,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 17:09:38,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:09:38,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:09:38,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:09:38,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:09:38,326 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:09:38,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:09:38,327 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:09:38,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:09:38,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:09:38,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:09:38,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:09:38,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:09:38,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:09:38,328 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:09:38,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:09:38,329 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:09:38,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:09:38,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:09:38,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:09:38,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:09:38,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:09:38,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:09:38,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:09:38,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:09:38,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:09:38,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:09:38,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:09:38,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:09:38,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:09:38,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:09:38,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:09:38,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:09:38,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:09:38,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:09:38,764 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:09:38,765 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-08-22 17:09:38,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e362fd5c/e5ae724f2d1049439e88fc83a2df7cad/FLAGfa3e80e3b [2020-08-22 17:09:39,721 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:09:39,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-08-22 17:09:39,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e362fd5c/e5ae724f2d1049439e88fc83a2df7cad/FLAGfa3e80e3b [2020-08-22 17:09:40,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e362fd5c/e5ae724f2d1049439e88fc83a2df7cad [2020-08-22 17:09:40,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:09:40,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:09:40,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:09:40,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:09:40,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:09:40,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:09:40" (1/1) ... [2020-08-22 17:09:40,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d7d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:40, skipping insertion in model container [2020-08-22 17:09:40,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:09:40" (1/1) ... [2020-08-22 17:09:40,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:09:40,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:09:42,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:09:42,233 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:09:43,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:09:43,229 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:09:43,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43 WrapperNode [2020-08-22 17:09:43,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:09:43,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:09:43,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:09:43,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:09:43,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... [2020-08-22 17:09:43,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:09:43,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:09:43,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:09:43,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:09:43,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:09:43,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:09:43,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:09:43,673 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:09:43,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:09:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:09:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:09:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:09:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:09:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:09:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:09:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:09:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:09:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:09:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:09:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:09:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 17:09:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:09:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:09:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:09:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:09:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:09:48,680 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:09:48,680 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:09:48,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:09:48 BoogieIcfgContainer [2020-08-22 17:09:48,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:09:48,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:09:48,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:09:48,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:09:48,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:09:40" (1/3) ... [2020-08-22 17:09:48,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c93abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:09:48, skipping insertion in model container [2020-08-22 17:09:48,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:09:43" (2/3) ... [2020-08-22 17:09:48,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c93abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:09:48, skipping insertion in model container [2020-08-22 17:09:48,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:09:48" (3/3) ... [2020-08-22 17:09:48,708 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-08-22 17:09:48,723 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:09:48,735 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 17:09:48,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 17:09:48,793 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:09:48,794 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:09:48,794 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:09:48,794 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:09:48,794 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:09:48,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:09:48,795 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:09:48,795 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:09:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-08-22 17:09:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-08-22 17:09:48,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:09:48,900 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] [2020-08-22 17:09:48,901 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:09:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:09:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-08-22 17:09:48,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:09:48,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782005613] [2020-08-22 17:09:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:09:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:52,216 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:09:52,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:09:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:09:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:09:52,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782005613] [2020-08-22 17:09:52,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:09:52,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:09:52,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036496920] [2020-08-22 17:09:52,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:09:52,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:09:52,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:09:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:09:52,543 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-08-22 17:09:53,480 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 389 [2020-08-22 17:10:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:10:06,361 INFO L93 Difference]: Finished difference Result 2212 states and 3947 transitions. [2020-08-22 17:10:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:10:06,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-08-22 17:10:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:10:06,406 INFO L225 Difference]: With dead ends: 2212 [2020-08-22 17:10:06,407 INFO L226 Difference]: Without dead ends: 1956 [2020-08-22 17:10:06,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:10:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-08-22 17:10:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1954. [2020-08-22 17:10:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2020-08-22 17:10:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3183 transitions. [2020-08-22 17:10:06,665 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3183 transitions. Word has length 467 [2020-08-22 17:10:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:10:06,674 INFO L479 AbstractCegarLoop]: Abstraction has 1954 states and 3183 transitions. [2020-08-22 17:10:06,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:10:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3183 transitions. [2020-08-22 17:10:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-08-22 17:10:06,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:10:06,702 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] [2020-08-22 17:10:06,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:10:06,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:10:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:10:06,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-08-22 17:10:06,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:10:06,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553182233] [2020-08-22 17:10:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:10:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:10,543 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:10:10,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:10:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:10:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553182233] [2020-08-22 17:10:11,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:10:11,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:10:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108622463] [2020-08-22 17:10:11,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:10:11,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:10:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:10:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:10:11,321 INFO L87 Difference]: Start difference. First operand 1954 states and 3183 transitions. Second operand 5 states. [2020-08-22 17:10:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:10:30,255 INFO L93 Difference]: Finished difference Result 5793 states and 9438 transitions. [2020-08-22 17:10:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:10:30,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2020-08-22 17:10:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:10:30,287 INFO L225 Difference]: With dead ends: 5793 [2020-08-22 17:10:30,287 INFO L226 Difference]: Without dead ends: 3856 [2020-08-22 17:10:30,298 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 [2020-08-22 17:10:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2020-08-22 17:10:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 3854. [2020-08-22 17:10:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3854 states. [2020-08-22 17:10:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6254 transitions. [2020-08-22 17:10:30,513 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6254 transitions. Word has length 467 [2020-08-22 17:10:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:10:30,514 INFO L479 AbstractCegarLoop]: Abstraction has 3854 states and 6254 transitions. [2020-08-22 17:10:30,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:10:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6254 transitions. [2020-08-22 17:10:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-08-22 17:10:30,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:10:30,538 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] [2020-08-22 17:10:30,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:10:30,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:10:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:10:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-08-22 17:10:30,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:10:30,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512633815] [2020-08-22 17:10:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:10:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:32,101 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:10:32,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:10:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:10:32,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512633815] [2020-08-22 17:10:32,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:10:32,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:10:32,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640181381] [2020-08-22 17:10:32,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:10:32,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:10:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:10:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:32,388 INFO L87 Difference]: Start difference. First operand 3854 states and 6254 transitions. Second operand 4 states. [2020-08-22 17:10:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:10:53,291 INFO L93 Difference]: Finished difference Result 11260 states and 18231 transitions. [2020-08-22 17:10:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:10:53,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-08-22 17:10:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:10:53,332 INFO L225 Difference]: With dead ends: 11260 [2020-08-22 17:10:53,332 INFO L226 Difference]: Without dead ends: 7620 [2020-08-22 17:10:53,344 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 [2020-08-22 17:10:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2020-08-22 17:10:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 7618. [2020-08-22 17:10:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2020-08-22 17:10:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 12321 transitions. [2020-08-22 17:10:53,710 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 12321 transitions. Word has length 469 [2020-08-22 17:10:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:10:53,711 INFO L479 AbstractCegarLoop]: Abstraction has 7618 states and 12321 transitions. [2020-08-22 17:10:53,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:10:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 12321 transitions. [2020-08-22 17:10:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-08-22 17:10:53,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:10:53,745 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] [2020-08-22 17:10:53,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:10:53,745 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:10:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:10:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-08-22 17:10:53,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:10:53,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998311376] [2020-08-22 17:10:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:10:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:54,959 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:10:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:10:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:10:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:10:55,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998311376] [2020-08-22 17:10:55,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:10:55,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:10:55,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561517546] [2020-08-22 17:10:55,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:10:55,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:10:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:10:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:10:55,137 INFO L87 Difference]: Start difference. First operand 7618 states and 12321 transitions. Second operand 4 states. [2020-08-22 17:11:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:13,541 INFO L93 Difference]: Finished difference Result 22757 states and 36795 transitions. [2020-08-22 17:11:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:11:13,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-08-22 17:11:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:13,601 INFO L225 Difference]: With dead ends: 22757 [2020-08-22 17:11:13,601 INFO L226 Difference]: Without dead ends: 15191 [2020-08-22 17:11:13,619 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 [2020-08-22 17:11:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2020-08-22 17:11:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 7665. [2020-08-22 17:11:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2020-08-22 17:11:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 12395 transitions. [2020-08-22 17:11:14,007 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 12395 transitions. Word has length 470 [2020-08-22 17:11:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:14,007 INFO L479 AbstractCegarLoop]: Abstraction has 7665 states and 12395 transitions. [2020-08-22 17:11:14,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:11:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 12395 transitions. [2020-08-22 17:11:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-08-22 17:11:14,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:14,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:11:14,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:11:14,032 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-08-22 17:11:14,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:14,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520085467] [2020-08-22 17:11:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:15,413 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:11:15,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:15,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520085467] [2020-08-22 17:11:15,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:15,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:15,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097828767] [2020-08-22 17:11:15,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:15,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:15,683 INFO L87 Difference]: Start difference. First operand 7665 states and 12395 transitions. Second operand 4 states. [2020-08-22 17:11:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:32,240 INFO L93 Difference]: Finished difference Result 22272 states and 35912 transitions. [2020-08-22 17:11:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:11:32,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-08-22 17:11:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:32,273 INFO L225 Difference]: With dead ends: 22272 [2020-08-22 17:11:32,273 INFO L226 Difference]: Without dead ends: 15006 [2020-08-22 17:11:32,289 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 [2020-08-22 17:11:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15006 states. [2020-08-22 17:11:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15006 to 15004. [2020-08-22 17:11:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-08-22 17:11:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 24145 transitions. [2020-08-22 17:11:33,149 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 24145 transitions. Word has length 471 [2020-08-22 17:11:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:33,150 INFO L479 AbstractCegarLoop]: Abstraction has 15004 states and 24145 transitions. [2020-08-22 17:11:33,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:11:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 24145 transitions. [2020-08-22 17:11:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-08-22 17:11:33,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:33,182 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] [2020-08-22 17:11:33,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:11:33,183 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:33,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-08-22 17:11:33,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:33,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152334011] [2020-08-22 17:11:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:34,086 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:11:34,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:34,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152334011] [2020-08-22 17:11:34,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:34,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:34,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301746149] [2020-08-22 17:11:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:34,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:34,279 INFO L87 Difference]: Start difference. First operand 15004 states and 24145 transitions. Second operand 4 states. [2020-08-22 17:11:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:11:52,000 INFO L93 Difference]: Finished difference Result 44756 states and 71990 transitions. [2020-08-22 17:11:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:11:52,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-08-22 17:11:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:11:52,061 INFO L225 Difference]: With dead ends: 44756 [2020-08-22 17:11:52,061 INFO L226 Difference]: Without dead ends: 29896 [2020-08-22 17:11:52,094 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 [2020-08-22 17:11:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-08-22 17:11:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 15102. [2020-08-22 17:11:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15102 states. [2020-08-22 17:11:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15102 states to 15102 states and 24296 transitions. [2020-08-22 17:11:52,797 INFO L78 Accepts]: Start accepts. Automaton has 15102 states and 24296 transitions. Word has length 471 [2020-08-22 17:11:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:11:52,797 INFO L479 AbstractCegarLoop]: Abstraction has 15102 states and 24296 transitions. [2020-08-22 17:11:52,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:11:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 15102 states and 24296 transitions. [2020-08-22 17:11:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-08-22 17:11:52,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:11:52,822 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, 1, 1, 1] [2020-08-22 17:11:52,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:11:52,823 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:11:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:11:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2067493155, now seen corresponding path program 1 times [2020-08-22 17:11:52,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:11:52,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76707652] [2020-08-22 17:11:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:11:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:54,787 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:11:54,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:11:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:11:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:11:55,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76707652] [2020-08-22 17:11:55,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:11:55,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:11:55,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832566214] [2020-08-22 17:11:55,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:11:55,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:11:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:11:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:11:55,006 INFO L87 Difference]: Start difference. First operand 15102 states and 24296 transitions. Second operand 4 states. [2020-08-22 17:12:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:12,861 INFO L93 Difference]: Finished difference Result 44891 states and 72171 transitions. [2020-08-22 17:12:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:12,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-08-22 17:12:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:12,912 INFO L225 Difference]: With dead ends: 44891 [2020-08-22 17:12:12,912 INFO L226 Difference]: Without dead ends: 30013 [2020-08-22 17:12:12,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30013 states. [2020-08-22 17:12:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30013 to 15219. [2020-08-22 17:12:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15219 states. [2020-08-22 17:12:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 24442 transitions. [2020-08-22 17:12:13,815 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 24442 transitions. Word has length 472 [2020-08-22 17:12:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:13,815 INFO L479 AbstractCegarLoop]: Abstraction has 15219 states and 24442 transitions. [2020-08-22 17:12:13,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 24442 transitions. [2020-08-22 17:12:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-08-22 17:12:13,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:13,840 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] [2020-08-22 17:12:13,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:12:13,840 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-08-22 17:12:13,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:13,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347405796] [2020-08-22 17:12:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:14,937 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:12:14,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:15,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347405796] [2020-08-22 17:12:15,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:15,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:15,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708892293] [2020-08-22 17:12:15,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:15,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:15,313 INFO L87 Difference]: Start difference. First operand 15219 states and 24442 transitions. Second operand 4 states. [2020-08-22 17:12:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:33,643 INFO L93 Difference]: Finished difference Result 43846 states and 70265 transitions. [2020-08-22 17:12:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:12:33,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-08-22 17:12:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:33,683 INFO L225 Difference]: With dead ends: 43846 [2020-08-22 17:12:33,683 INFO L226 Difference]: Without dead ends: 29596 [2020-08-22 17:12:33,705 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 [2020-08-22 17:12:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29596 states. [2020-08-22 17:12:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29596 to 29594. [2020-08-22 17:12:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29594 states. [2020-08-22 17:12:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29594 states to 29594 states and 47307 transitions. [2020-08-22 17:12:34,806 INFO L78 Accepts]: Start accepts. Automaton has 29594 states and 47307 transitions. Word has length 473 [2020-08-22 17:12:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:34,807 INFO L479 AbstractCegarLoop]: Abstraction has 29594 states and 47307 transitions. [2020-08-22 17:12:34,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:12:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 29594 states and 47307 transitions. [2020-08-22 17:12:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-08-22 17:12:34,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:34,835 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] [2020-08-22 17:12:34,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:12:34,835 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash -382866648, now seen corresponding path program 1 times [2020-08-22 17:12:34,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:34,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292029297] [2020-08-22 17:12:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:36,965 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:12:36,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:37,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292029297] [2020-08-22 17:12:37,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:37,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:12:37,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088544508] [2020-08-22 17:12:37,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:12:37,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:12:37,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:12:37,220 INFO L87 Difference]: Start difference. First operand 29594 states and 47307 transitions. Second operand 5 states. [2020-08-22 17:12:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:12:52,671 INFO L93 Difference]: Finished difference Result 66734 states and 107426 transitions. [2020-08-22 17:12:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:12:52,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-08-22 17:12:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:12:52,714 INFO L225 Difference]: With dead ends: 66734 [2020-08-22 17:12:52,714 INFO L226 Difference]: Without dead ends: 33950 [2020-08-22 17:12:52,740 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 [2020-08-22 17:12:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33950 states. [2020-08-22 17:12:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33950 to 33948. [2020-08-22 17:12:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33948 states. [2020-08-22 17:12:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 54478 transitions. [2020-08-22 17:12:53,997 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 54478 transitions. Word has length 473 [2020-08-22 17:12:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:12:53,998 INFO L479 AbstractCegarLoop]: Abstraction has 33948 states and 54478 transitions. [2020-08-22 17:12:53,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:12:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 54478 transitions. [2020-08-22 17:12:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-08-22 17:12:54,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:12:54,026 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] [2020-08-22 17:12:54,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:12:54,026 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:12:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:12:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1863306290, now seen corresponding path program 1 times [2020-08-22 17:12:54,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:12:54,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703467156] [2020-08-22 17:12:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:12:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:55,483 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:12:55,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:12:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:12:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:12:56,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703467156] [2020-08-22 17:12:56,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:12:56,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:12:56,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135225593] [2020-08-22 17:12:56,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:12:56,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:12:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:12:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:12:56,020 INFO L87 Difference]: Start difference. First operand 33948 states and 54478 transitions. Second operand 4 states. [2020-08-22 17:13:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:16,547 INFO L93 Difference]: Finished difference Result 99741 states and 160081 transitions. [2020-08-22 17:13:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:13:16,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-08-22 17:13:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:16,643 INFO L225 Difference]: With dead ends: 99741 [2020-08-22 17:13:16,643 INFO L226 Difference]: Without dead ends: 66813 [2020-08-22 17:13:16,682 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 [2020-08-22 17:13:16,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66813 states. [2020-08-22 17:13:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66813 to 66811. [2020-08-22 17:13:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66811 states. [2020-08-22 17:13:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66811 states to 66811 states and 106807 transitions. [2020-08-22 17:13:19,493 INFO L78 Accepts]: Start accepts. Automaton has 66811 states and 106807 transitions. Word has length 475 [2020-08-22 17:13:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:19,493 INFO L479 AbstractCegarLoop]: Abstraction has 66811 states and 106807 transitions. [2020-08-22 17:13:19,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:13:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 66811 states and 106807 transitions. [2020-08-22 17:13:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 17:13:19,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:19,563 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] [2020-08-22 17:13:19,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:13:19,563 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:19,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2006098379, now seen corresponding path program 1 times [2020-08-22 17:13:19,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:19,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463108968] [2020-08-22 17:13:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:20,451 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:13:20,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:20,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463108968] [2020-08-22 17:13:20,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:20,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:13:20,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733594448] [2020-08-22 17:13:20,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:13:20,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:13:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:20,699 INFO L87 Difference]: Start difference. First operand 66811 states and 106807 transitions. Second operand 4 states. [2020-08-22 17:13:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:13:37,726 INFO L93 Difference]: Finished difference Result 195685 states and 312451 transitions. [2020-08-22 17:13:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:13:37,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-08-22 17:13:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:13:37,855 INFO L225 Difference]: With dead ends: 195685 [2020-08-22 17:13:37,856 INFO L226 Difference]: Without dead ends: 131267 [2020-08-22 17:13:37,906 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 [2020-08-22 17:13:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131267 states. [2020-08-22 17:13:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131267 to 67201. [2020-08-22 17:13:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67201 states. [2020-08-22 17:13:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67201 states to 67201 states and 107383 transitions. [2020-08-22 17:13:41,222 INFO L78 Accepts]: Start accepts. Automaton has 67201 states and 107383 transitions. Word has length 476 [2020-08-22 17:13:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:13:41,222 INFO L479 AbstractCegarLoop]: Abstraction has 67201 states and 107383 transitions. [2020-08-22 17:13:41,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:13:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 67201 states and 107383 transitions. [2020-08-22 17:13:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-08-22 17:13:41,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:41,272 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] [2020-08-22 17:13:41,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:13:41,272 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1105309677, now seen corresponding path program 1 times [2020-08-22 17:13:41,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:41,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113896033] [2020-08-22 17:13:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:42,391 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:13:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:43,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113896033] [2020-08-22 17:13:43,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:43,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:13:43,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275712624] [2020-08-22 17:13:43,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:13:43,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:43,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:13:43,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:13:43,014 INFO L87 Difference]: Start difference. First operand 67201 states and 107383 transitions. Second operand 4 states. [2020-08-22 17:14:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:08,495 INFO L93 Difference]: Finished difference Result 196551 states and 313849 transitions. [2020-08-22 17:14:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:08,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-08-22 17:14:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:08,632 INFO L225 Difference]: With dead ends: 196551 [2020-08-22 17:14:08,632 INFO L226 Difference]: Without dead ends: 132200 [2020-08-22 17:14:08,681 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 [2020-08-22 17:14:08,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132200 states. [2020-08-22 17:14:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132200 to 132198. [2020-08-22 17:14:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132198 states. [2020-08-22 17:14:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132198 states to 132198 states and 210404 transitions. [2020-08-22 17:14:18,017 INFO L78 Accepts]: Start accepts. Automaton has 132198 states and 210404 transitions. Word has length 477 [2020-08-22 17:14:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:18,018 INFO L479 AbstractCegarLoop]: Abstraction has 132198 states and 210404 transitions. [2020-08-22 17:14:18,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 132198 states and 210404 transitions. [2020-08-22 17:14:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-08-22 17:14:18,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:18,117 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] [2020-08-22 17:14:18,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:14:18,118 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:18,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1693237162, now seen corresponding path program 1 times [2020-08-22 17:14:18,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:18,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411416175] [2020-08-22 17:14:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:20,216 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:14:20,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:20,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411416175] [2020-08-22 17:14:20,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:20,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:20,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648917689] [2020-08-22 17:14:20,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:14:20,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:14:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:20,391 INFO L87 Difference]: Start difference. First operand 132198 states and 210404 transitions. Second operand 5 states. [2020-08-22 17:14:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:45,666 INFO L93 Difference]: Finished difference Result 308141 states and 493722 transitions. [2020-08-22 17:14:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:14:45,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-08-22 17:14:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:45,838 INFO L225 Difference]: With dead ends: 308141 [2020-08-22 17:14:45,838 INFO L226 Difference]: Without dead ends: 157667 [2020-08-22 17:14:45,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:14:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157667 states. [2020-08-22 17:14:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157667 to 157665. [2020-08-22 17:14:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157665 states. [2020-08-22 17:14:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157665 states to 157665 states and 251972 transitions. [2020-08-22 17:14:56,442 INFO L78 Accepts]: Start accepts. Automaton has 157665 states and 251972 transitions. Word has length 477 [2020-08-22 17:14:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:56,442 INFO L479 AbstractCegarLoop]: Abstraction has 157665 states and 251972 transitions. [2020-08-22 17:14:56,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:14:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 157665 states and 251972 transitions. [2020-08-22 17:14:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:14:56,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:56,563 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] [2020-08-22 17:14:56,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:14:56,563 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash 355992395, now seen corresponding path program 1 times [2020-08-22 17:14:56,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:56,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237788027] [2020-08-22 17:14:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:57,796 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:14:57,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:58,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237788027] [2020-08-22 17:14:58,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:58,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:58,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399208432] [2020-08-22 17:14:58,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 17:14:58,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 17:14:58,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:14:58,008 INFO L87 Difference]: Start difference. First operand 157665 states and 251972 transitions. Second operand 6 states. [2020-08-22 17:14:58,884 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-08-22 17:15:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:19,570 INFO L93 Difference]: Finished difference Result 244651 states and 384741 transitions. [2020-08-22 17:15:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 17:15:19,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 479 [2020-08-22 17:15:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:19,733 INFO L225 Difference]: With dead ends: 244651 [2020-08-22 17:15:19,733 INFO L226 Difference]: Without dead ends: 157665 [2020-08-22 17:15:19,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 17:15:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157665 states. [2020-08-22 17:15:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157665 to 157665. [2020-08-22 17:15:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157665 states. [2020-08-22 17:15:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157665 states to 157665 states and 250124 transitions. [2020-08-22 17:15:32,479 INFO L78 Accepts]: Start accepts. Automaton has 157665 states and 250124 transitions. Word has length 479 [2020-08-22 17:15:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:32,479 INFO L479 AbstractCegarLoop]: Abstraction has 157665 states and 250124 transitions. [2020-08-22 17:15:32,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 17:15:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 157665 states and 250124 transitions. [2020-08-22 17:15:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:15:32,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:32,603 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] [2020-08-22 17:15:32,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:15:32,603 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1017913424, now seen corresponding path program 1 times [2020-08-22 17:15:32,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:32,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664803777] [2020-08-22 17:15:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:34,312 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:15:34,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:35,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664803777] [2020-08-22 17:15:35,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:35,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 17:15:35,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297387207] [2020-08-22 17:15:35,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 17:15:35,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 17:15:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-22 17:15:35,266 INFO L87 Difference]: Start difference. First operand 157665 states and 250124 transitions. Second operand 14 states. [2020-08-22 17:15:43,764 WARN L193 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-08-22 17:15:47,981 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 416 DAG size of output: 413 [2020-08-22 17:16:00,933 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-08-22 17:16:02,672 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-08-22 17:16:03,358 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-08-22 17:16:03,559 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-08-22 17:16:03,810 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-08-22 17:16:04,011 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-08-22 17:16:13,766 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-08-22 17:16:28,749 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-08-22 17:16:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:49,023 INFO L93 Difference]: Finished difference Result 333039 states and 521007 transitions. [2020-08-22 17:16:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 17:16:49,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 479 [2020-08-22 17:16:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:49,356 INFO L225 Difference]: With dead ends: 333039 [2020-08-22 17:16:49,357 INFO L226 Difference]: Without dead ends: 307085 [2020-08-22 17:16:49,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 17:16:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307085 states. [2020-08-22 17:17:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307085 to 170017. [2020-08-22 17:17:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170017 states. [2020-08-22 17:17:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170017 states to 170017 states and 267964 transitions. [2020-08-22 17:17:07,500 INFO L78 Accepts]: Start accepts. Automaton has 170017 states and 267964 transitions. Word has length 479 [2020-08-22 17:17:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:07,501 INFO L479 AbstractCegarLoop]: Abstraction has 170017 states and 267964 transitions. [2020-08-22 17:17:07,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 17:17:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 170017 states and 267964 transitions. [2020-08-22 17:17:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:17:07,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:07,636 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] [2020-08-22 17:17:07,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:17:07,637 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1908068521, now seen corresponding path program 1 times [2020-08-22 17:17:07,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:07,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346614028] [2020-08-22 17:17:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:09,521 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:17:09,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:09,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346614028] [2020-08-22 17:17:09,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:09,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:17:09,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859773569] [2020-08-22 17:17:09,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:17:09,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:17:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:17:09,750 INFO L87 Difference]: Start difference. First operand 170017 states and 267964 transitions. Second operand 5 states. [2020-08-22 17:17:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:53,977 INFO L93 Difference]: Finished difference Result 495155 states and 779819 transitions. [2020-08-22 17:17:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:17:53,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-08-22 17:17:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:54,352 INFO L225 Difference]: With dead ends: 495155 [2020-08-22 17:17:54,352 INFO L226 Difference]: Without dead ends: 329340 [2020-08-22 17:17:54,488 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 [2020-08-22 17:17:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329340 states. [2020-08-22 17:18:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329340 to 329338. [2020-08-22 17:18:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329338 states. [2020-08-22 17:18:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329338 states to 329338 states and 516766 transitions. [2020-08-22 17:18:27,918 INFO L78 Accepts]: Start accepts. Automaton has 329338 states and 516766 transitions. Word has length 479 [2020-08-22 17:18:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:27,918 INFO L479 AbstractCegarLoop]: Abstraction has 329338 states and 516766 transitions. [2020-08-22 17:18:27,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:18:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 329338 states and 516766 transitions. [2020-08-22 17:18:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:18:28,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:28,200 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] [2020-08-22 17:18:28,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:18:28,201 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1487480530, now seen corresponding path program 1 times [2020-08-22 17:18:28,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:28,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544820522] [2020-08-22 17:18:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:30,140 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:18:30,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:30,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544820522] [2020-08-22 17:18:30,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:30,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:18:30,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818705777] [2020-08-22 17:18:30,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:18:30,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:18:30,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:18:30,286 INFO L87 Difference]: Start difference. First operand 329338 states and 516766 transitions. Second operand 5 states. [2020-08-22 17:19:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:19:29,321 INFO L93 Difference]: Finished difference Result 793367 states and 1251800 transitions. [2020-08-22 17:19:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:19:29,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-08-22 17:19:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:19:29,850 INFO L225 Difference]: With dead ends: 793367 [2020-08-22 17:19:29,850 INFO L226 Difference]: Without dead ends: 404937 [2020-08-22 17:19:30,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:19:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404937 states. [2020-08-22 17:20:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404937 to 404935. [2020-08-22 17:20:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404935 states. [2020-08-22 17:20:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404935 states to 404935 states and 637529 transitions. [2020-08-22 17:20:13,982 INFO L78 Accepts]: Start accepts. Automaton has 404935 states and 637529 transitions. Word has length 479 [2020-08-22 17:20:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:20:13,983 INFO L479 AbstractCegarLoop]: Abstraction has 404935 states and 637529 transitions. [2020-08-22 17:20:13,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:20:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 404935 states and 637529 transitions. [2020-08-22 17:20:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 17:20:14,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:20:14,346 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] [2020-08-22 17:20:14,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 17:20:14,346 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:20:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:20:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -920505515, now seen corresponding path program 1 times [2020-08-22 17:20:14,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:20:14,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709974221] [2020-08-22 17:20:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:20:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:20:16,327 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-08-22 17:20:16,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:20:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:20:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:20:16,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709974221] [2020-08-22 17:20:16,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:20:16,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:20:16,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344444166] [2020-08-22 17:20:16,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:20:16,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:20:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:20:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:20:16,492 INFO L87 Difference]: Start difference. First operand 404935 states and 637529 transitions. Second operand 5 states.