/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:50:40,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:50:40,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:50:40,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:50:40,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:50:40,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:50:40,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:50:40,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:50:40,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:50:40,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:50:40,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:50:40,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:50:40,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:50:40,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:50:40,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:50:40,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:50:40,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:50:40,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:50:40,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:50:40,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:50:40,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:50:40,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:50:40,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:50:40,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:50:40,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:50:40,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:50:40,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:50:40,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:50:40,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:50:40,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:50:40,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:50:40,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:50:40,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:50:40,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:50:40,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:50:40,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:50:40,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:50:40,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:50:40,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:50:40,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:50:40,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:50:40,681 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:50:40,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:50:40,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:50:40,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:50:40,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:50:40,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:50:40,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:50:40,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:50:40,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:50:40,683 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:50:40,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:50:40,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:50:40,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:50:40,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:50:40,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:50:40,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:50:40,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:50:40,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:50:40,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:50:40,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:50:40,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:50:40,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:50:40,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:50:40,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:50:40,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:50:40,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:50:40,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:50:41,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:50:41,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:50:41,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:50:41,007 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:50:41,008 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:50:41,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa91f4c6f/9de6a27998ed47cb87516927ed33cb18/FLAGe548489fd [2020-07-07 11:50:41,756 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:50:41,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:50:41,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa91f4c6f/9de6a27998ed47cb87516927ed33cb18/FLAGe548489fd [2020-07-07 11:50:41,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa91f4c6f/9de6a27998ed47cb87516927ed33cb18 [2020-07-07 11:50:41,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:50:41,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:50:41,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:50:41,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:50:41,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:50:41,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:50:41" (1/1) ... [2020-07-07 11:50:41,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a43687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:41, skipping insertion in model container [2020-07-07 11:50:41,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:50:41" (1/1) ... [2020-07-07 11:50:41,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:50:42,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:50:43,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:50:43,752 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:50:44,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:50:44,828 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:50:44,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44 WrapperNode [2020-07-07 11:50:44,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:50:44,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:50:44,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:50:44,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:50:44,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:44,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:44,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:44,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:44,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:45,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:45,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... [2020-07-07 11:50:45,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:50:45,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:50:45,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:50:45,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:50:45,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:50:45,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:50:45,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:50:45,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:50:45,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:50:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:50:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:50:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-07 11:50:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:50:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:50:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:50:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:50:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:50:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:50:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:50:45,139 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:50:45,139 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:50:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:50:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-07 11:50:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:50:45,140 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:50:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:50:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:50:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:50:49,417 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:50:49,418 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:50:49,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:50:49 BoogieIcfgContainer [2020-07-07 11:50:49,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:50:49,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:50:49,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:50:49,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:50:49,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:50:41" (1/3) ... [2020-07-07 11:50:49,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20367965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:50:49, skipping insertion in model container [2020-07-07 11:50:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:50:44" (2/3) ... [2020-07-07 11:50:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20367965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:50:49, skipping insertion in model container [2020-07-07 11:50:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:50:49" (3/3) ... [2020-07-07 11:50:49,457 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:50:49,469 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:50:49,481 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:50:49,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:50:49,530 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:50:49,530 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:50:49,530 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:50:49,531 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:50:49,531 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:50:49,531 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:50:49,531 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:50:49,531 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:50:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-07 11:50:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-07 11:50:49,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:50:49,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:50:49,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:50:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:50:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-07 11:50:49,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:50:49,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355385461] [2020-07-07 11:50:49,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:50:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:52,297 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:50:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:50:52,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355385461] [2020-07-07 11:50:52,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:50:52,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:50:52,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060023158] [2020-07-07 11:50:52,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:50:52,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:50:52,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:50:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:50:52,609 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-07-07 11:50:53,450 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-07 11:51:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:51:03,664 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-07 11:51:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:51:03,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-07 11:51:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:51:03,705 INFO L225 Difference]: With dead ends: 2488 [2020-07-07 11:51:03,706 INFO L226 Difference]: Without dead ends: 2186 [2020-07-07 11:51:03,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:51:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-07 11:51:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-07 11:51:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-07 11:51:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-07 11:51:03,884 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-07 11:51:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:51:03,886 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-07 11:51:03,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:51:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-07 11:51:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-07 11:51:03,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:51:03,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:51:03,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:51:03,903 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:51:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:51:03,904 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-07 11:51:03,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:51:03,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580145413] [2020-07-07 11:51:03,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:51:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:06,286 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:51:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:51:07,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580145413] [2020-07-07 11:51:07,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:51:07,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:51:07,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194900126] [2020-07-07 11:51:07,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:51:07,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:51:07,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:51:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:51:07,010 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-07-07 11:51:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:51:22,362 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-07-07 11:51:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:51:22,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-07 11:51:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:51:22,389 INFO L225 Difference]: With dead ends: 6476 [2020-07-07 11:51:22,389 INFO L226 Difference]: Without dead ends: 4309 [2020-07-07 11:51:22,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:51:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-07-07 11:51:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-07-07 11:51:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-07-07 11:51:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-07-07 11:51:22,585 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-07-07 11:51:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:51:22,588 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-07-07 11:51:22,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:51:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-07-07 11:51:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-07 11:51:22,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:51:22,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:51:22,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:51:22,603 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:51:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:51:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-07-07 11:51:22,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:51:22,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354650691] [2020-07-07 11:51:22,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:51:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:24,059 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:51:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:51:24,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354650691] [2020-07-07 11:51:24,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:51:24,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:51:24,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096879046] [2020-07-07 11:51:24,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:51:24,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:51:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:51:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:51:24,433 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2020-07-07 11:51:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:51:42,113 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2020-07-07 11:51:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:51:42,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-07 11:51:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:51:42,156 INFO L225 Difference]: With dead ends: 12605 [2020-07-07 11:51:42,156 INFO L226 Difference]: Without dead ends: 8512 [2020-07-07 11:51:42,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:51:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2020-07-07 11:51:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2020-07-07 11:51:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2020-07-07 11:51:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2020-07-07 11:51:42,624 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2020-07-07 11:51:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:51:42,624 INFO L479 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2020-07-07 11:51:42,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:51:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2020-07-07 11:51:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-07 11:51:42,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:51:42,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:51:42,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:51:42,646 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:51:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:51:42,647 INFO L82 PathProgramCache]: Analyzing trace with hash -844140139, now seen corresponding path program 1 times [2020-07-07 11:51:42,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:51:42,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40481483] [2020-07-07 11:51:42,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:51:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:43,656 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:51:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:51:44,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40481483] [2020-07-07 11:51:44,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:51:44,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:51:44,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654185185] [2020-07-07 11:51:44,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:51:44,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:51:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:51:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:51:44,011 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2020-07-07 11:52:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:52:02,276 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2020-07-07 11:52:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:52:02,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-07 11:52:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:02,344 INFO L225 Difference]: With dead ends: 25433 [2020-07-07 11:52:02,344 INFO L226 Difference]: Without dead ends: 16975 [2020-07-07 11:52:02,363 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 [2020-07-07 11:52:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-07-07 11:52:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2020-07-07 11:52:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2020-07-07 11:52:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2020-07-07 11:52:02,855 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2020-07-07 11:52:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:52:02,855 INFO L479 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2020-07-07 11:52:02,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:52:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2020-07-07 11:52:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-07 11:52:02,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:52:02,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:52:02,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:52:02,877 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:52:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:52:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1609256108, now seen corresponding path program 1 times [2020-07-07 11:52:02,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:52:02,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548765144] [2020-07-07 11:52:02,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:52:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:04,071 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:52:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:52:04,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548765144] [2020-07-07 11:52:04,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:52:04,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:52:04,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723498376] [2020-07-07 11:52:04,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:52:04,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:52:04,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:52:04,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:04,463 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2020-07-07 11:52:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:52:23,175 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2020-07-07 11:52:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:52:23,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-07 11:52:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:23,212 INFO L225 Difference]: With dead ends: 24920 [2020-07-07 11:52:23,212 INFO L226 Difference]: Without dead ends: 16762 [2020-07-07 11:52:23,227 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 [2020-07-07 11:52:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2020-07-07 11:52:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2020-07-07 11:52:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2020-07-07 11:52:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2020-07-07 11:52:23,797 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2020-07-07 11:52:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:52:23,797 INFO L479 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2020-07-07 11:52:23,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:52:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2020-07-07 11:52:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-07 11:52:23,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:52:23,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:52:23,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:52:23,835 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:52:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:52:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1212361551, now seen corresponding path program 1 times [2020-07-07 11:52:23,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:52:23,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707378169] [2020-07-07 11:52:23,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:52:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:25,228 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:52:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:52:25,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707378169] [2020-07-07 11:52:25,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:52:25,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:52:25,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248847713] [2020-07-07 11:52:25,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:52:25,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:52:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:52:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:25,531 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2020-07-07 11:52:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:52:45,593 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2020-07-07 11:52:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:52:45,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-07 11:52:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:45,642 INFO L225 Difference]: With dead ends: 50024 [2020-07-07 11:52:45,642 INFO L226 Difference]: Without dead ends: 33408 [2020-07-07 11:52:45,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2020-07-07 11:52:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2020-07-07 11:52:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2020-07-07 11:52:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2020-07-07 11:52:47,435 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2020-07-07 11:52:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:52:47,435 INFO L479 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2020-07-07 11:52:47,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:52:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2020-07-07 11:52:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-07 11:52:47,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:52:47,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:52:47,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:52:47,461 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:52:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:52:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash -481026426, now seen corresponding path program 1 times [2020-07-07 11:52:47,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:52:47,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056737459] [2020-07-07 11:52:47,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:52:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:48,402 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:52:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:52:48,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056737459] [2020-07-07 11:52:48,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:52:48,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:52:48,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474189175] [2020-07-07 11:52:48,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:52:48,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:52:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:52:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:48,671 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2020-07-07 11:53:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:53:09,400 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2020-07-07 11:53:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:53:09,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-07 11:53:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:53:09,446 INFO L225 Difference]: With dead ends: 50159 [2020-07-07 11:53:09,446 INFO L226 Difference]: Without dead ends: 33525 [2020-07-07 11:53:09,475 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 [2020-07-07 11:53:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2020-07-07 11:53:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2020-07-07 11:53:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2020-07-07 11:53:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2020-07-07 11:53:10,130 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2020-07-07 11:53:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:53:10,130 INFO L479 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2020-07-07 11:53:10,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:53:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2020-07-07 11:53:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-07 11:53:10,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:53:10,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:53:10,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:53:10,151 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:53:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:53:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash 353604489, now seen corresponding path program 1 times [2020-07-07 11:53:10,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:53:10,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778637140] [2020-07-07 11:53:10,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:53:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:11,740 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:53:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:53:11,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778637140] [2020-07-07 11:53:11,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:53:11,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:53:11,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172178028] [2020-07-07 11:53:12,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:53:12,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:53:12,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:53:12,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:53:12,001 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2020-07-07 11:53:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:53:26,402 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2020-07-07 11:53:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:53:26,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-07 11:53:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:53:26,433 INFO L225 Difference]: With dead ends: 36907 [2020-07-07 11:53:26,433 INFO L226 Difference]: Without dead ends: 24449 [2020-07-07 11:53:26,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:53:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2020-07-07 11:53:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2020-07-07 11:53:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2020-07-07 11:53:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2020-07-07 11:53:27,153 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2020-07-07 11:53:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:53:27,154 INFO L479 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2020-07-07 11:53:27,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:53:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2020-07-07 11:53:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-07 11:53:27,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:53:27,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:53:27,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:53:27,171 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:53:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:53:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1516159687, now seen corresponding path program 1 times [2020-07-07 11:53:27,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:53:27,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947265041] [2020-07-07 11:53:27,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:53:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:28,379 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:53:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:53:28,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947265041] [2020-07-07 11:53:28,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:53:28,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:53:28,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468174105] [2020-07-07 11:53:28,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:53:28,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:53:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:53:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:53:28,880 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 4 states. [2020-07-07 11:53:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:53:50,303 INFO L93 Difference]: Finished difference Result 58562 states and 94581 transitions. [2020-07-07 11:53:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:53:50,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-07 11:53:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:53:50,340 INFO L225 Difference]: With dead ends: 58562 [2020-07-07 11:53:50,340 INFO L226 Difference]: Without dead ends: 39356 [2020-07-07 11:53:50,363 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 [2020-07-07 11:53:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39356 states. [2020-07-07 11:53:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39356 to 39354. [2020-07-07 11:53:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39354 states. [2020-07-07 11:53:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 63395 transitions. [2020-07-07 11:53:52,028 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 63395 transitions. Word has length 502 [2020-07-07 11:53:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:53:52,029 INFO L479 AbstractCegarLoop]: Abstraction has 39354 states and 63395 transitions. [2020-07-07 11:53:52,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:53:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 63395 transitions. [2020-07-07 11:53:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-07 11:53:52,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:53:52,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:53:52,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:53:52,064 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:53:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:53:52,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1083405788, now seen corresponding path program 1 times [2020-07-07 11:53:52,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:53:52,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102188939] [2020-07-07 11:53:52,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:53:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:54,050 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:53:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:53:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:53:54,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102188939] [2020-07-07 11:53:54,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:53:54,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:53:54,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907723170] [2020-07-07 11:53:54,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:53:54,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:53:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:53:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:53:54,206 INFO L87 Difference]: Start difference. First operand 39354 states and 63395 transitions. Second operand 5 states. [2020-07-07 11:54:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:54:15,256 INFO L93 Difference]: Finished difference Result 86454 states and 139882 transitions. [2020-07-07 11:54:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:54:15,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-07 11:54:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:54:15,305 INFO L225 Difference]: With dead ends: 86454 [2020-07-07 11:54:15,305 INFO L226 Difference]: Without dead ends: 43810 [2020-07-07 11:54:15,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:54:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43810 states. [2020-07-07 11:54:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43810 to 43808. [2020-07-07 11:54:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43808 states. [2020-07-07 11:54:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43808 states to 43808 states and 70674 transitions. [2020-07-07 11:54:17,275 INFO L78 Accepts]: Start accepts. Automaton has 43808 states and 70674 transitions. Word has length 502 [2020-07-07 11:54:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:54:17,276 INFO L479 AbstractCegarLoop]: Abstraction has 43808 states and 70674 transitions. [2020-07-07 11:54:17,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:54:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43808 states and 70674 transitions. [2020-07-07 11:54:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-07 11:54:17,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:54:17,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:54:17,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:54:17,315 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:54:17,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:54:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash -39965091, now seen corresponding path program 1 times [2020-07-07 11:54:17,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:54:17,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866258417] [2020-07-07 11:54:17,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:54:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:18,500 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:54:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:54:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866258417] [2020-07-07 11:54:18,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:54:18,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:54:18,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294222075] [2020-07-07 11:54:18,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:54:18,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:54:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:54:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:54:18,806 INFO L87 Difference]: Start difference. First operand 43808 states and 70674 transitions. Second operand 4 states. [2020-07-07 11:54:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:54:45,119 INFO L93 Difference]: Finished difference Result 129017 states and 208125 transitions. [2020-07-07 11:54:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:54:45,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-07 11:54:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:54:45,206 INFO L225 Difference]: With dead ends: 129017 [2020-07-07 11:54:45,207 INFO L226 Difference]: Without dead ends: 86229 [2020-07-07 11:54:45,237 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 [2020-07-07 11:54:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86229 states. [2020-07-07 11:54:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86229 to 86227. [2020-07-07 11:54:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86227 states. [2020-07-07 11:54:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86227 states to 86227 states and 138591 transitions. [2020-07-07 11:54:48,447 INFO L78 Accepts]: Start accepts. Automaton has 86227 states and 138591 transitions. Word has length 504 [2020-07-07 11:54:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:54:48,447 INFO L479 AbstractCegarLoop]: Abstraction has 86227 states and 138591 transitions. [2020-07-07 11:54:48,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:54:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 86227 states and 138591 transitions. [2020-07-07 11:54:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-07 11:54:48,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:54:48,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:54:48,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:54:48,524 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:54:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:54:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -405833094, now seen corresponding path program 1 times [2020-07-07 11:54:48,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:54:48,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269581707] [2020-07-07 11:54:48,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:54:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:49,964 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:54:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:54:50,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269581707] [2020-07-07 11:54:50,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:54:50,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:54:50,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986760883] [2020-07-07 11:54:50,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:54:50,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:54:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:54:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:54:50,125 INFO L87 Difference]: Start difference. First operand 86227 states and 138591 transitions. Second operand 4 states. [2020-07-07 11:55:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:55:11,080 INFO L93 Difference]: Finished difference Result 181383 states and 289969 transitions. [2020-07-07 11:55:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:55:11,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-07 11:55:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:55:11,203 INFO L225 Difference]: With dead ends: 181383 [2020-07-07 11:55:11,204 INFO L226 Difference]: Without dead ends: 122133 [2020-07-07 11:55:11,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:55:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122133 states. [2020-07-07 11:55:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122133 to 108755. [2020-07-07 11:55:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108755 states. [2020-07-07 11:55:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108755 states to 108755 states and 175647 transitions. [2020-07-07 11:55:15,980 INFO L78 Accepts]: Start accepts. Automaton has 108755 states and 175647 transitions. Word has length 504 [2020-07-07 11:55:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:55:15,980 INFO L479 AbstractCegarLoop]: Abstraction has 108755 states and 175647 transitions. [2020-07-07 11:55:15,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:55:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 108755 states and 175647 transitions. [2020-07-07 11:55:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-07 11:55:16,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:55:16,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:55:16,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:55:16,033 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:55:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:55:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1006642470, now seen corresponding path program 1 times [2020-07-07 11:55:16,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:55:16,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075121842] [2020-07-07 11:55:16,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:55:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:55:17,361 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:55:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:55:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:55:17,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075121842] [2020-07-07 11:55:17,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:55:17,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:55:17,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980745592] [2020-07-07 11:55:17,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:55:17,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:55:17,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:55:17,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:55:17,657 INFO L87 Difference]: Start difference. First operand 108755 states and 175647 transitions. Second operand 7 states. [2020-07-07 11:55:18,544 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 405 [2020-07-07 11:55:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:55:38,846 INFO L93 Difference]: Finished difference Result 229767 states and 368601 transitions. [2020-07-07 11:55:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:55:38,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 505 [2020-07-07 11:55:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:55:39,013 INFO L225 Difference]: With dead ends: 229767 [2020-07-07 11:55:39,013 INFO L226 Difference]: Without dead ends: 145445 [2020-07-07 11:55:39,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:55:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145445 states. [2020-07-07 11:55:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145445 to 145443. [2020-07-07 11:55:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145443 states. [2020-07-07 11:55:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145443 states to 145443 states and 233351 transitions. [2020-07-07 11:55:48,931 INFO L78 Accepts]: Start accepts. Automaton has 145443 states and 233351 transitions. Word has length 505 [2020-07-07 11:55:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:55:48,932 INFO L479 AbstractCegarLoop]: Abstraction has 145443 states and 233351 transitions. [2020-07-07 11:55:48,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:55:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 145443 states and 233351 transitions. [2020-07-07 11:55:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-07 11:55:49,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:55:49,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:55:49,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:55:49,002 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:55:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:55:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1930360351, now seen corresponding path program 1 times [2020-07-07 11:55:49,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:55:49,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361656601] [2020-07-07 11:55:49,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:55:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:55:50,732 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:55:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:55:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:55:51,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361656601] [2020-07-07 11:55:51,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:55:51,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 11:55:51,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242842458] [2020-07-07 11:55:51,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:55:51,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:55:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:55:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:55:51,331 INFO L87 Difference]: Start difference. First operand 145443 states and 233351 transitions. Second operand 10 states. [2020-07-07 11:55:52,235 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-07-07 11:56:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:56:24,937 INFO L93 Difference]: Finished difference Result 394417 states and 631073 transitions. [2020-07-07 11:56:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:56:24,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 505 [2020-07-07 11:56:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:56:25,301 INFO L225 Difference]: With dead ends: 394417 [2020-07-07 11:56:25,301 INFO L226 Difference]: Without dead ends: 273911 [2020-07-07 11:56:25,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:56:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273911 states. [2020-07-07 11:56:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273911 to 182147. [2020-07-07 11:56:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182147 states. [2020-07-07 11:56:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182147 states to 182147 states and 286567 transitions. [2020-07-07 11:56:39,705 INFO L78 Accepts]: Start accepts. Automaton has 182147 states and 286567 transitions. Word has length 505 [2020-07-07 11:56:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:56:39,706 INFO L479 AbstractCegarLoop]: Abstraction has 182147 states and 286567 transitions. [2020-07-07 11:56:39,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:56:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 182147 states and 286567 transitions. [2020-07-07 11:56:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-07 11:56:39,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:56:39,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:56:39,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:56:39,784 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:56:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:56:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash -16341642, now seen corresponding path program 1 times [2020-07-07 11:56:39,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:56:39,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462059067] [2020-07-07 11:56:39,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:56:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:56:41,371 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:56:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:56:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:56:42,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462059067] [2020-07-07 11:56:42,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:56:42,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:56:42,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768102761] [2020-07-07 11:56:42,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:56:42,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:56:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:56:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:56:42,005 INFO L87 Difference]: Start difference. First operand 182147 states and 286567 transitions. Second operand 5 states. [2020-07-07 11:57:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:57:22,391 INFO L93 Difference]: Finished difference Result 537846 states and 846586 transitions. [2020-07-07 11:57:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:57:22,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-07 11:57:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:57:22,863 INFO L225 Difference]: With dead ends: 537846 [2020-07-07 11:57:22,863 INFO L226 Difference]: Without dead ends: 357135 [2020-07-07 11:57:23,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:57:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357135 states. [2020-07-07 11:57:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357135 to 357133. [2020-07-07 11:57:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357133 states. [2020-07-07 11:57:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357133 states to 357133 states and 560769 transitions. [2020-07-07 11:57:53,307 INFO L78 Accepts]: Start accepts. Automaton has 357133 states and 560769 transitions. Word has length 505 [2020-07-07 11:57:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:57:53,308 INFO L479 AbstractCegarLoop]: Abstraction has 357133 states and 560769 transitions. [2020-07-07 11:57:53,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:57:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 357133 states and 560769 transitions. [2020-07-07 11:57:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-07 11:57:53,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:57:53,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:57:53,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:57:53,464 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:57:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:57:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1472156648, now seen corresponding path program 1 times [2020-07-07 11:57:53,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:57:53,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772246077] [2020-07-07 11:57:53,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:57:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:57:54,683 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 11:57:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:57:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:57:55,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772246077] [2020-07-07 11:57:55,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:57:55,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:57:55,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866067479] [2020-07-07 11:57:55,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:57:55,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:57:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:57:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:57:55,521 INFO L87 Difference]: Start difference. First operand 357133 states and 560769 transitions. Second operand 4 states. [2020-07-07 11:59:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:59:06,889 INFO L93 Difference]: Finished difference Result 1055902 states and 1656234 transitions. [2020-07-07 11:59:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:59:06,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-07 11:59:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:59:07,766 INFO L225 Difference]: With dead ends: 1055902 [2020-07-07 11:59:07,766 INFO L226 Difference]: Without dead ends: 703448 [2020-07-07 11:59:07,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:59:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703448 states. [2020-07-07 12:00:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703448 to 703446. [2020-07-07 12:00:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703446 states. [2020-07-07 12:00:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703446 states to 703446 states and 1100397 transitions. [2020-07-07 12:00:14,257 INFO L78 Accepts]: Start accepts. Automaton has 703446 states and 1100397 transitions. Word has length 506 [2020-07-07 12:00:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 12:00:14,257 INFO L479 AbstractCegarLoop]: Abstraction has 703446 states and 1100397 transitions. [2020-07-07 12:00:14,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 12:00:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 703446 states and 1100397 transitions. [2020-07-07 12:00:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-07 12:00:14,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 12:00:14,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 12:00:14,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 12:00:14,609 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 12:00:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 12:00:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash -303913291, now seen corresponding path program 1 times [2020-07-07 12:00:14,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 12:00:14,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886760302] [2020-07-07 12:00:14,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 12:00:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 12:00:16,990 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-07 12:00:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 12:00:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 12:00:17,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886760302] [2020-07-07 12:00:17,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 12:00:17,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 12:00:17,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898085435] [2020-07-07 12:00:17,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 12:00:17,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 12:00:17,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 12:00:17,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 12:00:17,149 INFO L87 Difference]: Start difference. First operand 703446 states and 1100397 transitions. Second operand 5 states. [2020-07-07 12:01:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 12:01:47,609 INFO L93 Difference]: Finished difference Result 1499547 states and 2351973 transitions. [2020-07-07 12:01:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 12:01:47,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-07-07 12:01:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 12:01:48,554 INFO L225 Difference]: With dead ends: 1499547 [2020-07-07 12:01:48,554 INFO L226 Difference]: Without dead ends: 752595 [2020-07-07 12:01:48,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 12:01:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752595 states.