/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:22:41,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:22:41,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:22:41,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:22:41,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:22:41,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:22:41,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:22:41,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:22:41,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:22:41,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:22:41,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:22:41,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:22:41,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:22:41,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:22:41,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:22:41,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:22:41,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:22:41,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:22:41,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:22:41,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:22:41,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:22:41,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:22:41,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:22:41,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:22:41,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:22:41,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:22:41,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:22:41,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:22:41,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:22:41,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:22:41,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:22:41,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:22:41,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:22:41,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:22:41,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:22:41,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:22:41,654 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 [2020-07-17 12:22:41,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:22:41,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:22:41,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:22:41,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:22:41,675 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:22:41,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:22:41,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:22:41,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:22:41,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:22:41,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:22:41,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:22:41,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:22:41,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:22:41,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:22:41,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:22:41,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:22:41,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:22:41,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:22:41,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:22:41,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:22:41,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:22:41,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:22:41,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:22:41,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:22:41,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:22:41,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:22:41,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:22:41,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:22:41,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:22:41,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:22:41,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:22:41,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:22:41,985 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:22:41,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:22:41,988 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:22:41,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:22:42,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e4e1e52/a155340eebc345b1a3d149b2cf3e60b0/FLAGfb5f480d1 [2020-07-17 12:22:42,784 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:22:42,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:22:42,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e4e1e52/a155340eebc345b1a3d149b2cf3e60b0/FLAGfb5f480d1 [2020-07-17 12:22:42,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e4e1e52/a155340eebc345b1a3d149b2cf3e60b0 [2020-07-17 12:22:42,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:22:42,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:22:42,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:22:42,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:22:42,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:22:42,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:22:42" (1/1) ... [2020-07-17 12:22:42,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5012d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:42, skipping insertion in model container [2020-07-17 12:22:42,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:22:42" (1/1) ... [2020-07-17 12:22:42,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:22:43,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:22:44,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:22:44,158 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:22:44,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:22:44,711 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:22:44,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44 WrapperNode [2020-07-17 12:22:44,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:22:44,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:22:44,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:22:44,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:22:44,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (1/1) ... [2020-07-17 12:22:44,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:22:44,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:22:44,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:22:44,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:22:44,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (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 [2020-07-17 12:22:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:22:45,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:22:45,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:22:45,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:22:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:22:45,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-17 12:22:45,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-17 12:22:45,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:22:45,010 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-17 12:22:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:22:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:22:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-17 12:22:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-17 12:22:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-17 12:22:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-17 12:22:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-17 12:22:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-17 12:22:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 12:22:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-17 12:22:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:22:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:22:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:22:47,564 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:22:47,565 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:22:47,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:22:47 BoogieIcfgContainer [2020-07-17 12:22:47,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:22:47,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:22:47,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:22:47,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:22:47,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:22:42" (1/3) ... [2020-07-17 12:22:47,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb6d246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:22:47, skipping insertion in model container [2020-07-17 12:22:47,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:22:44" (2/3) ... [2020-07-17 12:22:47,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb6d246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:22:47, skipping insertion in model container [2020-07-17 12:22:47,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:22:47" (3/3) ... [2020-07-17 12:22:47,584 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:22:47,595 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:22:47,604 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:22:47,619 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:22:47,647 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:22:47,648 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:22:47,648 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:22:47,648 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:22:47,648 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:22:47,648 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:22:47,648 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:22:47,649 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:22:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-17 12:22:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 12:22:47,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:47,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:47,710 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:47,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-17 12:22:47,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:47,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342815631] [2020-07-17 12:22:47,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:49,473 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:49,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342815631] [2020-07-17 12:22:49,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:49,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:49,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120421292] [2020-07-17 12:22:49,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:49,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:49,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:49,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:49,715 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-07-17 12:22:50,186 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:22:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:22:55,380 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-07-17 12:22:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:22:55,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-17 12:22:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:22:55,435 INFO L225 Difference]: With dead ends: 1527 [2020-07-17 12:22:55,436 INFO L226 Difference]: Without dead ends: 1311 [2020-07-17 12:22:55,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:22:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-07-17 12:22:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-07-17 12:22:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-07-17 12:22:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-07-17 12:22:55,634 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-07-17 12:22:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:22:55,641 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-07-17 12:22:55,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:22:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-07-17 12:22:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 12:22:55,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:22:55,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:22:55,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:22:55,657 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:22:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:22:55,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-07-17 12:22:55,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:22:55,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766443270] [2020-07-17 12:22:55,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:22:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:56,789 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:22:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:22:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:22:57,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766443270] [2020-07-17 12:22:57,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:22:57,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:22:57,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652324351] [2020-07-17 12:22:57,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:22:57,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:22:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:22:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:22:57,082 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-07-17 12:22:57,522 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:23:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:02,002 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-07-17 12:23:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:23:02,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-17 12:23:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:02,019 INFO L225 Difference]: With dead ends: 2683 [2020-07-17 12:23:02,019 INFO L226 Difference]: Without dead ends: 2301 [2020-07-17 12:23:02,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:23:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-07-17 12:23:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-07-17 12:23:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-07-17 12:23:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-07-17 12:23:02,112 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-07-17 12:23:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:02,113 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-07-17 12:23:02,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-07-17 12:23:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 12:23:02,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:02,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:02,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:23:02,122 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-07-17 12:23:02,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:02,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593513568] [2020-07-17 12:23:02,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:02,957 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:03,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593513568] [2020-07-17 12:23:03,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:03,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:03,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321758200] [2020-07-17 12:23:03,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:03,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:03,169 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-07-17 12:23:03,579 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:23:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:08,395 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-07-17 12:23:08,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:23:08,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-17 12:23:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:08,419 INFO L225 Difference]: With dead ends: 4867 [2020-07-17 12:23:08,419 INFO L226 Difference]: Without dead ends: 4201 [2020-07-17 12:23:08,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:23:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-07-17 12:23:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-07-17 12:23:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-07-17 12:23:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-07-17 12:23:08,561 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-07-17 12:23:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:08,562 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-07-17 12:23:08,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-07-17 12:23:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 12:23:08,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:08,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:08,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:23:08,574 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-07-17 12:23:08,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:08,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359166843] [2020-07-17 12:23:08,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:09,704 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:09,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359166843] [2020-07-17 12:23:09,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:09,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:23:09,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685910199] [2020-07-17 12:23:09,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:23:09,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:23:09,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:23:09,843 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-07-17 12:23:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:17,626 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-07-17 12:23:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:23:17,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-17 12:23:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:17,664 INFO L225 Difference]: With dead ends: 12414 [2020-07-17 12:23:17,665 INFO L226 Difference]: Without dead ends: 8230 [2020-07-17 12:23:17,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:23:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-07-17 12:23:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-07-17 12:23:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-07-17 12:23:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-07-17 12:23:18,022 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-07-17 12:23:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:18,023 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-07-17 12:23:18,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:23:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-07-17 12:23:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 12:23:18,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:18,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:18,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:23:18,045 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:18,046 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-07-17 12:23:18,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:18,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56927789] [2020-07-17 12:23:18,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:18,897 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:19,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56927789] [2020-07-17 12:23:19,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:19,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:19,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619366311] [2020-07-17 12:23:19,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:19,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:19,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:19,274 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-07-17 12:23:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:27,582 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-07-17 12:23:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:27,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-17 12:23:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:27,647 INFO L225 Difference]: With dead ends: 24233 [2020-07-17 12:23:27,648 INFO L226 Difference]: Without dead ends: 16134 [2020-07-17 12:23:27,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-07-17 12:23:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-07-17 12:23:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-07-17 12:23:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-07-17 12:23:28,147 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-07-17 12:23:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:28,147 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-07-17 12:23:28,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-07-17 12:23:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 12:23:28,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:28,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:28,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:23:28,182 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-07-17 12:23:28,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:28,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282960385] [2020-07-17 12:23:28,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:28,786 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:28,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282960385] [2020-07-17 12:23:28,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:28,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:28,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937063968] [2020-07-17 12:23:28,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:28,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:28,908 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-07-17 12:23:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:37,452 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-07-17 12:23:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:37,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-17 12:23:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:37,518 INFO L225 Difference]: With dead ends: 48321 [2020-07-17 12:23:37,518 INFO L226 Difference]: Without dead ends: 32231 [2020-07-17 12:23:37,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-07-17 12:23:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2020-07-17 12:23:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-07-17 12:23:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2020-07-17 12:23:38,424 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2020-07-17 12:23:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:38,425 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2020-07-17 12:23:38,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2020-07-17 12:23:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-17 12:23:38,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:38,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:38,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:23:38,456 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times [2020-07-17 12:23:38,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:38,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93235305] [2020-07-17 12:23:38,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:38,967 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:39,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93235305] [2020-07-17 12:23:39,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:39,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:39,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935807111] [2020-07-17 12:23:39,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:39,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:39,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:39,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:39,076 INFO L87 Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states. [2020-07-17 12:23:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:48,368 INFO L93 Difference]: Finished difference Result 48340 states and 74120 transitions. [2020-07-17 12:23:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:48,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-17 12:23:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:48,432 INFO L225 Difference]: With dead ends: 48340 [2020-07-17 12:23:48,432 INFO L226 Difference]: Without dead ends: 32249 [2020-07-17 12:23:48,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-07-17 12:23:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169. [2020-07-17 12:23:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16169 states. [2020-07-17 12:23:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions. [2020-07-17 12:23:49,111 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333 [2020-07-17 12:23:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:23:49,112 INFO L479 AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions. [2020-07-17 12:23:49,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:23:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions. [2020-07-17 12:23:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-17 12:23:49,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:23:49,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:23:49,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:23:49,150 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:23:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:23:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1155788840, now seen corresponding path program 1 times [2020-07-17 12:23:49,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:23:49,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965109365] [2020-07-17 12:23:49,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:23:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:49,860 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:23:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:23:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:23:50,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965109365] [2020-07-17 12:23:50,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:23:50,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:23:50,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458414610] [2020-07-17 12:23:50,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:23:50,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:23:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:23:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:50,038 INFO L87 Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 4 states. [2020-07-17 12:23:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:23:58,728 INFO L93 Difference]: Finished difference Result 45818 states and 70099 transitions. [2020-07-17 12:23:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:23:58,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-17 12:23:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:23:58,771 INFO L225 Difference]: With dead ends: 45818 [2020-07-17 12:23:58,771 INFO L226 Difference]: Without dead ends: 29894 [2020-07-17 12:23:58,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:23:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29894 states. [2020-07-17 12:24:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 29892. [2020-07-17 12:24:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29892 states. [2020-07-17 12:24:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29892 states to 29892 states and 45506 transitions. [2020-07-17 12:24:00,374 INFO L78 Accepts]: Start accepts. Automaton has 29892 states and 45506 transitions. Word has length 334 [2020-07-17 12:24:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:00,374 INFO L479 AbstractCegarLoop]: Abstraction has 29892 states and 45506 transitions. [2020-07-17 12:24:00,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:24:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29892 states and 45506 transitions. [2020-07-17 12:24:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-17 12:24:00,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:00,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:24:00,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:24:00,405 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash -942652091, now seen corresponding path program 1 times [2020-07-17 12:24:00,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:00,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850248629] [2020-07-17 12:24:00,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:01,267 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:01,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850248629] [2020-07-17 12:24:01,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:01,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:24:01,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201982322] [2020-07-17 12:24:01,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:24:01,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:24:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:24:01,389 INFO L87 Difference]: Start difference. First operand 29892 states and 45506 transitions. Second operand 5 states. [2020-07-17 12:24:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:08,188 INFO L93 Difference]: Finished difference Result 61161 states and 93093 transitions. [2020-07-17 12:24:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:24:08,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-17 12:24:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:08,232 INFO L225 Difference]: With dead ends: 61161 [2020-07-17 12:24:08,232 INFO L226 Difference]: Without dead ends: 30761 [2020-07-17 12:24:08,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:24:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30761 states. [2020-07-17 12:24:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30761 to 30759. [2020-07-17 12:24:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30759 states. [2020-07-17 12:24:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30759 states to 30759 states and 46644 transitions. [2020-07-17 12:24:09,480 INFO L78 Accepts]: Start accepts. Automaton has 30759 states and 46644 transitions. Word has length 334 [2020-07-17 12:24:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:09,480 INFO L479 AbstractCegarLoop]: Abstraction has 30759 states and 46644 transitions. [2020-07-17 12:24:09,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:24:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 30759 states and 46644 transitions. [2020-07-17 12:24:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 12:24:09,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:09,500 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] [2020-07-17 12:24:09,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:24:09,501 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1954972824, now seen corresponding path program 1 times [2020-07-17 12:24:09,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:09,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978733649] [2020-07-17 12:24:09,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,036 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:10,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978733649] [2020-07-17 12:24:10,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:10,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:24:10,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501726231] [2020-07-17 12:24:10,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:24:10,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:10,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:24:10,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:10,138 INFO L87 Difference]: Start difference. First operand 30759 states and 46644 transitions. Second operand 4 states. [2020-07-17 12:24:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:16,692 INFO L93 Difference]: Finished difference Result 91405 states and 138455 transitions. [2020-07-17 12:24:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:24:16,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-17 12:24:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:16,750 INFO L225 Difference]: With dead ends: 91405 [2020-07-17 12:24:16,750 INFO L226 Difference]: Without dead ends: 61099 [2020-07-17 12:24:16,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61099 states. [2020-07-17 12:24:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61099 to 30817. [2020-07-17 12:24:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30817 states. [2020-07-17 12:24:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30817 states to 30817 states and 46719 transitions. [2020-07-17 12:24:18,026 INFO L78 Accepts]: Start accepts. Automaton has 30817 states and 46719 transitions. Word has length 336 [2020-07-17 12:24:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:18,027 INFO L479 AbstractCegarLoop]: Abstraction has 30817 states and 46719 transitions. [2020-07-17 12:24:18,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:24:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 30817 states and 46719 transitions. [2020-07-17 12:24:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 12:24:18,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:18,056 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] [2020-07-17 12:24:18,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:24:18,056 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1525087342, now seen corresponding path program 1 times [2020-07-17 12:24:18,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:18,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607034163] [2020-07-17 12:24:18,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:19,147 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:19,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607034163] [2020-07-17 12:24:19,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:19,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:24:19,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819077450] [2020-07-17 12:24:19,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:24:19,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:24:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:19,303 INFO L87 Difference]: Start difference. First operand 30817 states and 46719 transitions. Second operand 4 states. [2020-07-17 12:24:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:29,689 INFO L93 Difference]: Finished difference Result 90896 states and 137566 transitions. [2020-07-17 12:24:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:24:29,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-17 12:24:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:29,752 INFO L225 Difference]: With dead ends: 90896 [2020-07-17 12:24:29,752 INFO L226 Difference]: Without dead ends: 60364 [2020-07-17 12:24:29,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:24:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60364 states. [2020-07-17 12:24:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60364 to 60362. [2020-07-17 12:24:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60362 states. [2020-07-17 12:24:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60362 states to 60362 states and 90890 transitions. [2020-07-17 12:24:32,234 INFO L78 Accepts]: Start accepts. Automaton has 60362 states and 90890 transitions. Word has length 336 [2020-07-17 12:24:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:32,234 INFO L479 AbstractCegarLoop]: Abstraction has 60362 states and 90890 transitions. [2020-07-17 12:24:32,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:24:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 60362 states and 90890 transitions. [2020-07-17 12:24:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 12:24:32,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:32,289 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] [2020-07-17 12:24:32,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:24:32,289 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash 204469451, now seen corresponding path program 1 times [2020-07-17 12:24:32,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:32,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983926157] [2020-07-17 12:24:32,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:34,706 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:34,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983926157] [2020-07-17 12:24:34,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:34,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:24:34,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920883054] [2020-07-17 12:24:34,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:24:34,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:24:34,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:24:34,828 INFO L87 Difference]: Start difference. First operand 60362 states and 90890 transitions. Second operand 5 states. [2020-07-17 12:24:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:24:43,567 INFO L93 Difference]: Finished difference Result 124456 states and 187265 transitions. [2020-07-17 12:24:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:24:43,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-17 12:24:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:24:43,633 INFO L225 Difference]: With dead ends: 124456 [2020-07-17 12:24:43,634 INFO L226 Difference]: Without dead ends: 62896 [2020-07-17 12:24:43,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:24:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62896 states. [2020-07-17 12:24:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62896 to 62894. [2020-07-17 12:24:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62894 states. [2020-07-17 12:24:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62894 states to 62894 states and 94291 transitions. [2020-07-17 12:24:46,305 INFO L78 Accepts]: Start accepts. Automaton has 62894 states and 94291 transitions. Word has length 336 [2020-07-17 12:24:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:24:46,305 INFO L479 AbstractCegarLoop]: Abstraction has 62894 states and 94291 transitions. [2020-07-17 12:24:46,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:24:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 62894 states and 94291 transitions. [2020-07-17 12:24:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 12:24:46,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:24:46,365 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] [2020-07-17 12:24:46,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:24:46,365 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:24:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:24:46,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1381804601, now seen corresponding path program 1 times [2020-07-17 12:24:46,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:24:46,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860018224] [2020-07-17 12:24:46,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:24:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:47,255 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:24:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:24:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:24:47,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860018224] [2020-07-17 12:24:47,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:24:47,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:24:47,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925363443] [2020-07-17 12:24:47,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:24:47,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:24:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:24:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:24:47,372 INFO L87 Difference]: Start difference. First operand 62894 states and 94291 transitions. Second operand 5 states. [2020-07-17 12:25:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:25:08,159 INFO L93 Difference]: Finished difference Result 236101 states and 353136 transitions. [2020-07-17 12:25:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:25:08,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-17 12:25:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:25:08,384 INFO L225 Difference]: With dead ends: 236101 [2020-07-17 12:25:08,384 INFO L226 Difference]: Without dead ends: 175187 [2020-07-17 12:25:08,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:25:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175187 states. [2020-07-17 12:25:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175187 to 63421. [2020-07-17 12:25:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63421 states. [2020-07-17 12:25:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63421 states to 63421 states and 95051 transitions. [2020-07-17 12:25:12,210 INFO L78 Accepts]: Start accepts. Automaton has 63421 states and 95051 transitions. Word has length 336 [2020-07-17 12:25:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:12,210 INFO L479 AbstractCegarLoop]: Abstraction has 63421 states and 95051 transitions. [2020-07-17 12:25:12,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:25:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 63421 states and 95051 transitions. [2020-07-17 12:25:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 12:25:12,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:12,250 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] [2020-07-17 12:25:12,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:25:12,250 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:12,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1523242626, now seen corresponding path program 1 times [2020-07-17 12:25:12,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:12,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112230403] [2020-07-17 12:25:12,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:12,889 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:25:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:25:12,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112230403] [2020-07-17 12:25:12,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:25:12,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:25:12,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877377349] [2020-07-17 12:25:12,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:25:12,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:25:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:25:12,998 INFO L87 Difference]: Start difference. First operand 63421 states and 95051 transitions. Second operand 4 states. [2020-07-17 12:25:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:25:25,549 INFO L93 Difference]: Finished difference Result 154675 states and 233747 transitions. [2020-07-17 12:25:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:25:25,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-17 12:25:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:25:25,669 INFO L225 Difference]: With dead ends: 154675 [2020-07-17 12:25:25,669 INFO L226 Difference]: Without dead ends: 98135 [2020-07-17 12:25:25,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:25:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98135 states. [2020-07-17 12:25:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98135 to 78373. [2020-07-17 12:25:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78373 states. [2020-07-17 12:25:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78373 states to 78373 states and 119245 transitions. [2020-07-17 12:25:29,834 INFO L78 Accepts]: Start accepts. Automaton has 78373 states and 119245 transitions. Word has length 336 [2020-07-17 12:25:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:29,834 INFO L479 AbstractCegarLoop]: Abstraction has 78373 states and 119245 transitions. [2020-07-17 12:25:29,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:25:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 78373 states and 119245 transitions. [2020-07-17 12:25:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-17 12:25:29,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:29,874 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] [2020-07-17 12:25:29,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:25:29,874 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1011511093, now seen corresponding path program 1 times [2020-07-17 12:25:29,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:29,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224482961] [2020-07-17 12:25:29,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:30,707 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:25:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:25:30,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224482961] [2020-07-17 12:25:30,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:25:30,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:25:30,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275264706] [2020-07-17 12:25:30,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:25:30,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:25:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:25:30,786 INFO L87 Difference]: Start difference. First operand 78373 states and 119245 transitions. Second operand 4 states. [2020-07-17 12:25:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:25:44,417 INFO L93 Difference]: Finished difference Result 191231 states and 292641 transitions. [2020-07-17 12:25:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:25:44,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-17 12:25:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:25:44,562 INFO L225 Difference]: With dead ends: 191231 [2020-07-17 12:25:44,562 INFO L226 Difference]: Without dead ends: 121143 [2020-07-17 12:25:44,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:25:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121143 states. [2020-07-17 12:25:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121143 to 105117. [2020-07-17 12:25:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105117 states. [2020-07-17 12:25:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105117 states to 105117 states and 162273 transitions. [2020-07-17 12:25:50,482 INFO L78 Accepts]: Start accepts. Automaton has 105117 states and 162273 transitions. Word has length 338 [2020-07-17 12:25:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:25:50,482 INFO L479 AbstractCegarLoop]: Abstraction has 105117 states and 162273 transitions. [2020-07-17 12:25:50,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:25:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 105117 states and 162273 transitions. [2020-07-17 12:25:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-17 12:25:50,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:25:50,522 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] [2020-07-17 12:25:50,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:25:50,522 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:25:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:25:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1179578371, now seen corresponding path program 1 times [2020-07-17 12:25:50,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:25:50,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774942144] [2020-07-17 12:25:50,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:25:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:51,095 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:25:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:25:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:25:51,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774942144] [2020-07-17 12:25:51,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:25:51,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:25:51,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089397869] [2020-07-17 12:25:51,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:25:51,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:25:51,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:25:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:25:51,193 INFO L87 Difference]: Start difference. First operand 105117 states and 162273 transitions. Second operand 4 states. [2020-07-17 12:26:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:12,512 INFO L93 Difference]: Finished difference Result 309401 states and 477239 transitions. [2020-07-17 12:26:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:26:12,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-17 12:26:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:12,766 INFO L225 Difference]: With dead ends: 309401 [2020-07-17 12:26:12,766 INFO L226 Difference]: Without dead ends: 207007 [2020-07-17 12:26:12,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207007 states. [2020-07-17 12:26:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207007 to 105385. [2020-07-17 12:26:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105385 states. [2020-07-17 12:26:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105385 states to 105385 states and 162633 transitions. [2020-07-17 12:26:22,200 INFO L78 Accepts]: Start accepts. Automaton has 105385 states and 162633 transitions. Word has length 338 [2020-07-17 12:26:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:22,200 INFO L479 AbstractCegarLoop]: Abstraction has 105385 states and 162633 transitions. [2020-07-17 12:26:22,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 105385 states and 162633 transitions. [2020-07-17 12:26:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-17 12:26:22,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:22,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:22,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:26:22,240 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2004623867, now seen corresponding path program 1 times [2020-07-17 12:26:22,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:22,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223870093] [2020-07-17 12:26:22,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:22,795 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:22,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223870093] [2020-07-17 12:26:22,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:22,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:22,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072282131] [2020-07-17 12:26:22,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:22,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:22,862 INFO L87 Difference]: Start difference. First operand 105385 states and 162633 transitions. Second operand 4 states. [2020-07-17 12:26:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:45,633 INFO L93 Difference]: Finished difference Result 309581 states and 477371 transitions. [2020-07-17 12:26:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:26:45,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-17 12:26:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:45,901 INFO L225 Difference]: With dead ends: 309581 [2020-07-17 12:26:45,902 INFO L226 Difference]: Without dead ends: 207207 [2020-07-17 12:26:45,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207207 states. [2020-07-17 12:26:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207207 to 105617. [2020-07-17 12:26:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105617 states. [2020-07-17 12:26:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105617 states to 105617 states and 162859 transitions. [2020-07-17 12:26:53,833 INFO L78 Accepts]: Start accepts. Automaton has 105617 states and 162859 transitions. Word has length 339 [2020-07-17 12:26:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:53,833 INFO L479 AbstractCegarLoop]: Abstraction has 105617 states and 162859 transitions. [2020-07-17 12:26:53,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 105617 states and 162859 transitions. [2020-07-17 12:26:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-17 12:26:53,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:53,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:26:53,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:26:53,873 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:53,873 INFO L82 PathProgramCache]: Analyzing trace with hash 130285857, now seen corresponding path program 1 times [2020-07-17 12:26:53,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:53,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175129227] [2020-07-17 12:26:53,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:54,965 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:55,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175129227] [2020-07-17 12:26:55,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:55,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:26:55,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391532655] [2020-07-17 12:26:55,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:26:55,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:26:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:26:55,098 INFO L87 Difference]: Start difference. First operand 105617 states and 162859 transitions. Second operand 6 states. [2020-07-17 12:26:55,628 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-17 12:27:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:09,693 INFO L93 Difference]: Finished difference Result 203925 states and 314880 transitions. [2020-07-17 12:27:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:27:09,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 339 [2020-07-17 12:27:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:09,830 INFO L225 Difference]: With dead ends: 203925 [2020-07-17 12:27:09,831 INFO L226 Difference]: Without dead ends: 105617 [2020-07-17 12:27:09,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:27:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105617 states. [2020-07-17 12:27:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105617 to 105617. [2020-07-17 12:27:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105617 states. [2020-07-17 12:27:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105617 states to 105617 states and 161553 transitions. [2020-07-17 12:27:17,332 INFO L78 Accepts]: Start accepts. Automaton has 105617 states and 161553 transitions. Word has length 339 [2020-07-17 12:27:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:17,333 INFO L479 AbstractCegarLoop]: Abstraction has 105617 states and 161553 transitions. [2020-07-17 12:27:17,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:27:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 105617 states and 161553 transitions. [2020-07-17 12:27:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-17 12:27:17,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:17,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:27:17,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 12:27:17,371 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash 450094822, now seen corresponding path program 1 times [2020-07-17 12:27:17,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:17,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081063505] [2020-07-17 12:27:17,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:18,144 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:18,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081063505] [2020-07-17 12:27:18,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:18,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:27:18,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750686865] [2020-07-17 12:27:18,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:27:18,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:27:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:27:18,260 INFO L87 Difference]: Start difference. First operand 105617 states and 161553 transitions. Second operand 5 states. [2020-07-17 12:27:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:42,276 INFO L93 Difference]: Finished difference Result 311079 states and 475904 transitions. [2020-07-17 12:27:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:27:42,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-17 12:27:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:42,553 INFO L225 Difference]: With dead ends: 311079 [2020-07-17 12:27:42,553 INFO L226 Difference]: Without dead ends: 206248 [2020-07-17 12:27:42,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:27:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206248 states. [2020-07-17 12:28:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206248 to 206246. [2020-07-17 12:28:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206246 states. [2020-07-17 12:28:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206246 states to 206246 states and 314105 transitions. [2020-07-17 12:28:02,397 INFO L78 Accepts]: Start accepts. Automaton has 206246 states and 314105 transitions. Word has length 339 [2020-07-17 12:28:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:02,398 INFO L479 AbstractCegarLoop]: Abstraction has 206246 states and 314105 transitions. [2020-07-17 12:28:02,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:28:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 206246 states and 314105 transitions. [2020-07-17 12:28:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-17 12:28:02,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:02,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:28:02,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 12:28:02,829 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1313560112, now seen corresponding path program 1 times [2020-07-17 12:28:02,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:02,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804080976] [2020-07-17 12:28:02,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:03,538 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:28:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:28:03,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804080976] [2020-07-17 12:28:03,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:28:03,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:28:03,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463984768] [2020-07-17 12:28:03,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:28:03,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:03,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:28:03,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:28:03,645 INFO L87 Difference]: Start difference. First operand 206246 states and 314105 transitions. Second operand 5 states. [2020-07-17 12:28:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:30,168 INFO L93 Difference]: Finished difference Result 298939 states and 455124 transitions. [2020-07-17 12:28:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:28:30,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2020-07-17 12:28:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:30,415 INFO L225 Difference]: With dead ends: 298939 [2020-07-17 12:28:30,415 INFO L226 Difference]: Without dead ends: 206248 [2020-07-17 12:28:30,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:28:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206248 states. [2020-07-17 12:28:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206248 to 202094. [2020-07-17 12:28:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202094 states. [2020-07-17 12:28:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202094 states to 202094 states and 308128 transitions. [2020-07-17 12:28:50,949 INFO L78 Accepts]: Start accepts. Automaton has 202094 states and 308128 transitions. Word has length 340 [2020-07-17 12:28:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:50,949 INFO L479 AbstractCegarLoop]: Abstraction has 202094 states and 308128 transitions. [2020-07-17 12:28:50,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:28:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 202094 states and 308128 transitions. [2020-07-17 12:28:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-17 12:28:51,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:51,027 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] [2020-07-17 12:28:51,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 12:28:51,028 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1213258003, now seen corresponding path program 1 times [2020-07-17 12:28:51,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:51,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216825050] [2020-07-17 12:28:51,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:51,580 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:28:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:28:51,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216825050] [2020-07-17 12:28:51,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:28:51,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:28:51,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161716785] [2020-07-17 12:28:51,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:28:51,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:51,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:28:51,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:28:51,650 INFO L87 Difference]: Start difference. First operand 202094 states and 308128 transitions. Second operand 4 states. [2020-07-17 12:29:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:29:37,789 INFO L93 Difference]: Finished difference Result 602388 states and 918204 transitions. [2020-07-17 12:29:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:29:37,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-17 12:29:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:29:38,311 INFO L225 Difference]: With dead ends: 602388 [2020-07-17 12:29:38,311 INFO L226 Difference]: Without dead ends: 401908 [2020-07-17 12:29:38,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:29:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401908 states. [2020-07-17 12:29:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401908 to 202438. [2020-07-17 12:29:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202438 states. [2020-07-17 12:29:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202438 states to 202438 states and 308496 transitions. [2020-07-17 12:29:57,240 INFO L78 Accepts]: Start accepts. Automaton has 202438 states and 308496 transitions. Word has length 343 [2020-07-17 12:29:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:57,240 INFO L479 AbstractCegarLoop]: Abstraction has 202438 states and 308496 transitions. [2020-07-17 12:29:57,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:29:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 202438 states and 308496 transitions. [2020-07-17 12:29:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-17 12:29:57,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:57,326 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] [2020-07-17 12:29:57,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 12:29:57,326 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 810066552, now seen corresponding path program 1 times [2020-07-17 12:29:57,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:57,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937089693] [2020-07-17 12:29:57,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:58,314 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:29:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:29:58,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937089693] [2020-07-17 12:29:58,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:29:58,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:29:58,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835778396] [2020-07-17 12:29:58,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:29:58,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:58,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:29:58,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:29:58,421 INFO L87 Difference]: Start difference. First operand 202438 states and 308496 transitions. Second operand 4 states. [2020-07-17 12:30:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:30:44,452 INFO L93 Difference]: Finished difference Result 591343 states and 899983 transitions. [2020-07-17 12:30:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:30:44,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-17 12:30:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:30:44,983 INFO L225 Difference]: With dead ends: 591343 [2020-07-17 12:30:44,983 INFO L226 Difference]: Without dead ends: 394037 [2020-07-17 12:30:45,128 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 [2020-07-17 12:30:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394037 states. [2020-07-17 12:31:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394037 to 394035. [2020-07-17 12:31:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394035 states. [2020-07-17 12:31:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394035 states to 394035 states and 596729 transitions. [2020-07-17 12:31:25,843 INFO L78 Accepts]: Start accepts. Automaton has 394035 states and 596729 transitions. Word has length 343 [2020-07-17 12:31:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:31:25,843 INFO L479 AbstractCegarLoop]: Abstraction has 394035 states and 596729 transitions. [2020-07-17 12:31:25,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:31:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 394035 states and 596729 transitions. [2020-07-17 12:31:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-17 12:31:26,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:31:26,012 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] [2020-07-17 12:31:26,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 12:31:26,013 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:31:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:31:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1897294648, now seen corresponding path program 1 times [2020-07-17 12:31:26,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:31:26,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144912840] [2020-07-17 12:31:26,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:31:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:26,628 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:31:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:31:26,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144912840] [2020-07-17 12:31:26,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:31:26,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:31:26,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749914526] [2020-07-17 12:31:26,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:31:26,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:31:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:31:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:31:26,733 INFO L87 Difference]: Start difference. First operand 394035 states and 596729 transitions. Second operand 4 states. [2020-07-17 12:32:52,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:32:52,676 INFO L93 Difference]: Finished difference Result 1140591 states and 1724853 transitions. [2020-07-17 12:32:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:32:52,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-07-17 12:32:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:32:53,801 INFO L225 Difference]: With dead ends: 1140591 [2020-07-17 12:32:53,801 INFO L226 Difference]: Without dead ends: 749338 [2020-07-17 12:32:54,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749338 states. [2020-07-17 12:34:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749338 to 749336. [2020-07-17 12:34:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749336 states. [2020-07-17 12:34:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749336 states to 749336 states and 1125229 transitions. [2020-07-17 12:34:20,720 INFO L78 Accepts]: Start accepts. Automaton has 749336 states and 1125229 transitions. Word has length 345 [2020-07-17 12:34:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:34:20,721 INFO L479 AbstractCegarLoop]: Abstraction has 749336 states and 1125229 transitions. [2020-07-17 12:34:20,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:34:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 749336 states and 1125229 transitions. [2020-07-17 12:34:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-17 12:34:21,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:34:21,040 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] [2020-07-17 12:34:21,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 12:34:21,040 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:34:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:34:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1956235936, now seen corresponding path program 1 times [2020-07-17 12:34:21,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:34:21,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999104561] [2020-07-17 12:34:21,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:34:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:21,786 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:34:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:34:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:34:21,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999104561] [2020-07-17 12:34:21,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:34:21,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:34:21,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941927014] [2020-07-17 12:34:21,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:34:21,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:34:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:34:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:34:21,870 INFO L87 Difference]: Start difference. First operand 749336 states and 1125229 transitions. Second operand 5 states.