/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 0.1.25-3af5e1f [2020-09-04 14:00:28,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 14:00:28,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 14:00:28,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 14:00:28,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 14:00:28,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 14:00:28,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 14:00:28,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 14:00:28,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 14:00:28,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 14:00:28,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 14:00:28,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 14:00:28,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 14:00:28,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 14:00:28,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 14:00:28,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 14:00:28,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 14:00:28,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 14:00:28,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 14:00:28,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 14:00:28,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 14:00:28,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 14:00:28,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 14:00:28,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 14:00:28,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 14:00:28,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 14:00:28,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 14:00:28,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 14:00:28,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 14:00:28,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 14:00:28,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 14:00:28,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 14:00:28,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 14:00:28,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 14:00:28,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 14:00:28,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 14:00:28,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 14:00:28,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 14:00:28,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 14:00:28,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 14:00:28,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 14:00:28,884 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 14:00:28,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 14:00:28,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 14:00:28,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 14:00:28,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 14:00:28,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 14:00:28,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 14:00:28,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 14:00:28,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 14:00:28,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 14:00:28,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 14:00:28,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 14:00:28,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 14:00:28,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 14:00:28,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 14:00:28,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 14:00:28,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 14:00:28,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:00:28,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 14:00:28,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 14:00:28,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 14:00:28,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 14:00:28,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 14:00:28,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 14:00:28,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 14:00:28,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 14:00:29,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 14:00:29,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 14:00:29,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 14:00:29,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 14:00:29,437 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 14:00:29,438 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 14:00:29,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6fa36322/5ef2fe2797b4404a86cd5c46a064d497/FLAGbc69806c9 [2020-09-04 14:00:30,268 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 14:00:30,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 14:00:30,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6fa36322/5ef2fe2797b4404a86cd5c46a064d497/FLAGbc69806c9 [2020-09-04 14:00:30,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6fa36322/5ef2fe2797b4404a86cd5c46a064d497 [2020-09-04 14:00:30,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 14:00:30,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 14:00:30,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 14:00:30,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 14:00:30,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 14:00:30,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:00:30" (1/1) ... [2020-09-04 14:00:30,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b57a4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:30, skipping insertion in model container [2020-09-04 14:00:30,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:00:30" (1/1) ... [2020-09-04 14:00:30,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 14:00:30,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 14:00:31,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:00:31,736 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 14:00:32,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:00:32,244 INFO L208 MainTranslator]: Completed translation [2020-09-04 14:00:32,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32 WrapperNode [2020-09-04 14:00:32,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 14:00:32,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 14:00:32,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 14:00:32,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 14:00:32,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... [2020-09-04 14:00:32,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 14:00:32,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 14:00:32,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 14:00:32,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 14:00:32,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:00:32,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 14:00:32,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 14:00:32,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 14:00:32,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 14:00:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 14:00:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 14:00:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-04 14:00:32,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 14:00:32,585 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 14:00:32,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 14:00:32,585 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 14:00:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 14:00:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 14:00:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 14:00:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 14:00:32,586 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 14:00:32,587 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 14:00:32,587 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 14:00:32,587 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 14:00:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 14:00:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 14:00:32,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 14:00:35,489 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 14:00:35,489 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 14:00:35,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:00:35 BoogieIcfgContainer [2020-09-04 14:00:35,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 14:00:35,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 14:00:35,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 14:00:35,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 14:00:35,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 02:00:30" (1/3) ... [2020-09-04 14:00:35,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2812c144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:00:35, skipping insertion in model container [2020-09-04 14:00:35,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:00:32" (2/3) ... [2020-09-04 14:00:35,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2812c144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:00:35, skipping insertion in model container [2020-09-04 14:00:35,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:00:35" (3/3) ... [2020-09-04 14:00:35,512 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 14:00:35,525 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 14:00:35,537 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 14:00:35,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 14:00:35,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 14:00:35,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 14:00:35,600 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 14:00:35,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 14:00:35,600 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 14:00:35,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 14:00:35,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 14:00:35,601 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 14:00:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-09-04 14:00:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:00:35,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:35,674 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] [2020-09-04 14:00:35,674 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:35,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-09-04 14:00:35,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:35,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944703489] [2020-09-04 14:00:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:37,765 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:37,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:38,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944703489] [2020-09-04 14:00:38,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:38,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:38,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114011481] [2020-09-04 14:00:38,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:38,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:38,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:38,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:38,151 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-09-04 14:00:39,031 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:44,536 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-09-04 14:00:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:44,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-04 14:00:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:44,574 INFO L225 Difference]: With dead ends: 1527 [2020-09-04 14:00:44,574 INFO L226 Difference]: Without dead ends: 1311 [2020-09-04 14:00:44,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-09-04 14:00:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-09-04 14:00:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-09-04 14:00:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-09-04 14:00:44,743 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-09-04 14:00:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:44,745 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-09-04 14:00:44,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-09-04 14:00:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:00:44,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:44,753 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] [2020-09-04 14:00:44,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 14:00:44,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-09-04 14:00:44,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:44,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529400368] [2020-09-04 14:00:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:45,755 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:45,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:46,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529400368] [2020-09-04 14:00:46,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:46,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:46,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657975502] [2020-09-04 14:00:46,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:46,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:46,141 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-09-04 14:00:46,817 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:51,553 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-09-04 14:00:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:51,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-04 14:00:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:51,579 INFO L225 Difference]: With dead ends: 2683 [2020-09-04 14:00:51,580 INFO L226 Difference]: Without dead ends: 2301 [2020-09-04 14:00:51,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-09-04 14:00:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-09-04 14:00:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-09-04 14:00:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-09-04 14:00:51,728 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-09-04 14:00:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:51,730 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-09-04 14:00:51,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-09-04 14:00:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:00:51,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:51,750 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] [2020-09-04 14:00:51,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 14:00:51,750 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:51,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-09-04 14:00:51,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:51,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731956362] [2020-09-04 14:00:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:53,086 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:00:53,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:53,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731956362] [2020-09-04 14:00:53,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:53,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:53,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171131974] [2020-09-04 14:00:53,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:53,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:53,485 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-09-04 14:00:53,999 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-04 14:00:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:58,722 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-09-04 14:00:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:00:58,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-04 14:00:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:58,745 INFO L225 Difference]: With dead ends: 4867 [2020-09-04 14:00:58,745 INFO L226 Difference]: Without dead ends: 4201 [2020-09-04 14:00:58,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:00:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-09-04 14:00:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-09-04 14:00:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-09-04 14:00:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-09-04 14:00:58,891 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-09-04 14:00:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:58,892 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-09-04 14:00:58,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-09-04 14:00:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 14:00:58,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:58,908 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] [2020-09-04 14:00:58,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 14:00:58,909 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-09-04 14:00:58,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:58,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421194250] [2020-09-04 14:00:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:00,015 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:00,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:00,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421194250] [2020-09-04 14:01:00,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:00,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:00,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43335179] [2020-09-04 14:01:00,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:00,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:00,292 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-09-04 14:01:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:08,408 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-09-04 14:01:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:01:08,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-09-04 14:01:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:08,448 INFO L225 Difference]: With dead ends: 12414 [2020-09-04 14:01:08,448 INFO L226 Difference]: Without dead ends: 8230 [2020-09-04 14:01:08,459 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 [2020-09-04 14:01:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-09-04 14:01:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-09-04 14:01:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-09-04 14:01:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-09-04 14:01:08,868 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-09-04 14:01:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:08,868 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-09-04 14:01:08,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:01:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-09-04 14:01:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-04 14:01:08,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:08,886 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] [2020-09-04 14:01:08,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 14:01:08,887 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-09-04 14:01:08,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:08,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189598520] [2020-09-04 14:01:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:09,678 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:09,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:09,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189598520] [2020-09-04 14:01:09,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:09,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:09,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045339208] [2020-09-04 14:01:09,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:09,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:09,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:09,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:09,846 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-09-04 14:01:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:18,873 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-09-04 14:01:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:18,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-09-04 14:01:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:18,935 INFO L225 Difference]: With dead ends: 24233 [2020-09-04 14:01:18,935 INFO L226 Difference]: Without dead ends: 16134 [2020-09-04 14:01:18,953 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 [2020-09-04 14:01:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-09-04 14:01:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-09-04 14:01:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-09-04 14:01:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-09-04 14:01:19,542 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-09-04 14:01:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:19,543 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-09-04 14:01:19,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-09-04 14:01:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-04 14:01:19,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:19,577 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] [2020-09-04 14:01:19,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:01:19,577 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:19,578 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-09-04 14:01:19,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:19,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939740634] [2020-09-04 14:01:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:20,214 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:20,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:20,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939740634] [2020-09-04 14:01:20,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:20,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:20,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293872546] [2020-09-04 14:01:20,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:20,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:20,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:20,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:20,310 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-09-04 14:01:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:30,152 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-09-04 14:01:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:30,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-09-04 14:01:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:30,224 INFO L225 Difference]: With dead ends: 48321 [2020-09-04 14:01:30,225 INFO L226 Difference]: Without dead ends: 32231 [2020-09-04 14:01:30,259 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 [2020-09-04 14:01:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-09-04 14:01:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2020-09-04 14:01:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-09-04 14:01:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2020-09-04 14:01:31,182 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2020-09-04 14:01:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:31,182 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2020-09-04 14:01:31,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2020-09-04 14:01:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-09-04 14:01:31,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:31,215 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] [2020-09-04 14:01:31,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:01:31,215 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times [2020-09-04 14:01:31,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:31,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375756789] [2020-09-04 14:01:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:31,854 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:31,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:31,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375756789] [2020-09-04 14:01:31,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:31,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:31,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460714207] [2020-09-04 14:01:31,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:31,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:31,981 INFO L87 Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states. [2020-09-04 14:01:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:41,756 INFO L93 Difference]: Finished difference Result 48340 states and 74120 transitions. [2020-09-04 14:01:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:41,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-09-04 14:01:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:41,821 INFO L225 Difference]: With dead ends: 48340 [2020-09-04 14:01:41,821 INFO L226 Difference]: Without dead ends: 32249 [2020-09-04 14:01:41,856 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 [2020-09-04 14:01:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-09-04 14:01:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169. [2020-09-04 14:01:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16169 states. [2020-09-04 14:01:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions. [2020-09-04 14:01:42,870 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333 [2020-09-04 14:01:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:42,870 INFO L479 AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions. [2020-09-04 14:01:42,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions. [2020-09-04 14:01:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-04 14:01:42,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:42,908 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] [2020-09-04 14:01:42,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:01:42,909 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1155788840, now seen corresponding path program 1 times [2020-09-04 14:01:42,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:42,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905157473] [2020-09-04 14:01:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:43,975 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:43,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:44,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905157473] [2020-09-04 14:01:44,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:44,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:44,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745722670] [2020-09-04 14:01:44,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:44,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:44,154 INFO L87 Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 4 states. [2020-09-04 14:01:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:53,835 INFO L93 Difference]: Finished difference Result 45818 states and 70099 transitions. [2020-09-04 14:01:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:53,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-09-04 14:01:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:53,883 INFO L225 Difference]: With dead ends: 45818 [2020-09-04 14:01:53,883 INFO L226 Difference]: Without dead ends: 29894 [2020-09-04 14:01:53,922 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 [2020-09-04 14:01:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29894 states. [2020-09-04 14:01:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 29892. [2020-09-04 14:01:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29892 states. [2020-09-04 14:01:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29892 states to 29892 states and 45506 transitions. [2020-09-04 14:01:55,169 INFO L78 Accepts]: Start accepts. Automaton has 29892 states and 45506 transitions. Word has length 334 [2020-09-04 14:01:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:55,169 INFO L479 AbstractCegarLoop]: Abstraction has 29892 states and 45506 transitions. [2020-09-04 14:01:55,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29892 states and 45506 transitions. [2020-09-04 14:01:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-04 14:01:55,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:55,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:01:55,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:01:55,212 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -942652091, now seen corresponding path program 1 times [2020-09-04 14:01:55,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:55,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954419836] [2020-09-04 14:01:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:56,178 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:01:56,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:56,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954419836] [2020-09-04 14:01:56,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:56,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:56,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625420624] [2020-09-04 14:01:56,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:56,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:56,299 INFO L87 Difference]: Start difference. First operand 29892 states and 45506 transitions. Second operand 5 states. [2020-09-04 14:02:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:03,934 INFO L93 Difference]: Finished difference Result 61161 states and 93093 transitions. [2020-09-04 14:02:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:02:03,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-09-04 14:02:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:03,973 INFO L225 Difference]: With dead ends: 61161 [2020-09-04 14:02:03,973 INFO L226 Difference]: Without dead ends: 30761 [2020-09-04 14:02:04,001 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 [2020-09-04 14:02:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30761 states. [2020-09-04 14:02:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30761 to 30759. [2020-09-04 14:02:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30759 states. [2020-09-04 14:02:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30759 states to 30759 states and 46644 transitions. [2020-09-04 14:02:05,020 INFO L78 Accepts]: Start accepts. Automaton has 30759 states and 46644 transitions. Word has length 334 [2020-09-04 14:02:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:05,021 INFO L479 AbstractCegarLoop]: Abstraction has 30759 states and 46644 transitions. [2020-09-04 14:02:05,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:02:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 30759 states and 46644 transitions. [2020-09-04 14:02:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-09-04 14:02:05,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:05,043 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] [2020-09-04 14:02:05,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:02:05,043 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1954972824, now seen corresponding path program 1 times [2020-09-04 14:02:05,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:05,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448383813] [2020-09-04 14:02:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:05,647 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:05,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:05,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448383813] [2020-09-04 14:02:05,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:05,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:05,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945995980] [2020-09-04 14:02:05,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:05,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:05,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:05,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:05,782 INFO L87 Difference]: Start difference. First operand 30759 states and 46644 transitions. Second operand 4 states. [2020-09-04 14:02:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:13,409 INFO L93 Difference]: Finished difference Result 91405 states and 138455 transitions. [2020-09-04 14:02:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:13,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-09-04 14:02:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:13,470 INFO L225 Difference]: With dead ends: 91405 [2020-09-04 14:02:13,470 INFO L226 Difference]: Without dead ends: 61099 [2020-09-04 14:02:13,501 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 [2020-09-04 14:02:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61099 states. [2020-09-04 14:02:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61099 to 30817. [2020-09-04 14:02:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30817 states. [2020-09-04 14:02:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30817 states to 30817 states and 46719 transitions. [2020-09-04 14:02:14,828 INFO L78 Accepts]: Start accepts. Automaton has 30817 states and 46719 transitions. Word has length 336 [2020-09-04 14:02:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:14,829 INFO L479 AbstractCegarLoop]: Abstraction has 30817 states and 46719 transitions. [2020-09-04 14:02:14,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 30817 states and 46719 transitions. [2020-09-04 14:02:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-09-04 14:02:14,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:14,856 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] [2020-09-04 14:02:14,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:02:14,856 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1525087342, now seen corresponding path program 1 times [2020-09-04 14:02:14,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:14,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10552606] [2020-09-04 14:02:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:15,844 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:16,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10552606] [2020-09-04 14:02:16,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:16,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:16,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529635663] [2020-09-04 14:02:16,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:16,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:16,018 INFO L87 Difference]: Start difference. First operand 30817 states and 46719 transitions. Second operand 4 states. [2020-09-04 14:02:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:27,430 INFO L93 Difference]: Finished difference Result 90896 states and 137566 transitions. [2020-09-04 14:02:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:27,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-09-04 14:02:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:27,496 INFO L225 Difference]: With dead ends: 90896 [2020-09-04 14:02:27,496 INFO L226 Difference]: Without dead ends: 60364 [2020-09-04 14:02:27,526 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 [2020-09-04 14:02:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60364 states. [2020-09-04 14:02:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60364 to 60362. [2020-09-04 14:02:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60362 states. [2020-09-04 14:02:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60362 states to 60362 states and 90890 transitions. [2020-09-04 14:02:30,804 INFO L78 Accepts]: Start accepts. Automaton has 60362 states and 90890 transitions. Word has length 336 [2020-09-04 14:02:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:30,804 INFO L479 AbstractCegarLoop]: Abstraction has 60362 states and 90890 transitions. [2020-09-04 14:02:30,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 60362 states and 90890 transitions. [2020-09-04 14:02:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-09-04 14:02:30,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:30,858 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] [2020-09-04 14:02:30,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:02:30,858 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:30,858 INFO L82 PathProgramCache]: Analyzing trace with hash 204469451, now seen corresponding path program 1 times [2020-09-04 14:02:30,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:30,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450913001] [2020-09-04 14:02:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:32,026 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:32,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:32,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450913001] [2020-09-04 14:02:32,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:32,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:32,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680794178] [2020-09-04 14:02:32,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:32,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:32,162 INFO L87 Difference]: Start difference. First operand 60362 states and 90890 transitions. Second operand 5 states. [2020-09-04 14:02:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:42,842 INFO L93 Difference]: Finished difference Result 124456 states and 187265 transitions. [2020-09-04 14:02:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:02:42,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-09-04 14:02:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:42,914 INFO L225 Difference]: With dead ends: 124456 [2020-09-04 14:02:42,914 INFO L226 Difference]: Without dead ends: 62896 [2020-09-04 14:02:42,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:02:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62896 states. [2020-09-04 14:02:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62896 to 62894. [2020-09-04 14:02:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62894 states. [2020-09-04 14:02:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62894 states to 62894 states and 94291 transitions. [2020-09-04 14:02:45,573 INFO L78 Accepts]: Start accepts. Automaton has 62894 states and 94291 transitions. Word has length 336 [2020-09-04 14:02:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:45,573 INFO L479 AbstractCegarLoop]: Abstraction has 62894 states and 94291 transitions. [2020-09-04 14:02:45,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:02:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 62894 states and 94291 transitions. [2020-09-04 14:02:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-09-04 14:02:45,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:45,613 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] [2020-09-04 14:02:45,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:02:45,613 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1381804601, now seen corresponding path program 1 times [2020-09-04 14:02:45,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:45,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419526812] [2020-09-04 14:02:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:46,626 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:02:46,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:02:46,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419526812] [2020-09-04 14:02:46,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:46,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:46,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443160648] [2020-09-04 14:02:46,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:46,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:46,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:46,791 INFO L87 Difference]: Start difference. First operand 62894 states and 94291 transitions. Second operand 5 states. [2020-09-04 14:03:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:03,653 INFO L93 Difference]: Finished difference Result 180006 states and 269292 transitions. [2020-09-04 14:03:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:03:03,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-09-04 14:03:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:03,789 INFO L225 Difference]: With dead ends: 180006 [2020-09-04 14:03:03,789 INFO L226 Difference]: Without dead ends: 119248 [2020-09-04 14:03:03,844 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 [2020-09-04 14:03:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119248 states. [2020-09-04 14:03:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119248 to 63493. [2020-09-04 14:03:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63493 states. [2020-09-04 14:03:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63493 states to 63493 states and 95179 transitions. [2020-09-04 14:03:07,170 INFO L78 Accepts]: Start accepts. Automaton has 63493 states and 95179 transitions. Word has length 336 [2020-09-04 14:03:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:07,170 INFO L479 AbstractCegarLoop]: Abstraction has 63493 states and 95179 transitions. [2020-09-04 14:03:07,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:03:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63493 states and 95179 transitions. [2020-09-04 14:03:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-09-04 14:03:07,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:07,230 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] [2020-09-04 14:03:07,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:03:07,230 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1523242626, now seen corresponding path program 1 times [2020-09-04 14:03:07,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:07,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778537670] [2020-09-04 14:03:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:07,951 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:03:07,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:08,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778537670] [2020-09-04 14:03:08,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:08,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:08,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654838320] [2020-09-04 14:03:08,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:08,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:08,067 INFO L87 Difference]: Start difference. First operand 63493 states and 95179 transitions. Second operand 4 states. [2020-09-04 14:03:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:21,419 INFO L93 Difference]: Finished difference Result 154747 states and 233875 transitions. [2020-09-04 14:03:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:21,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-09-04 14:03:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:21,531 INFO L225 Difference]: With dead ends: 154747 [2020-09-04 14:03:21,531 INFO L226 Difference]: Without dead ends: 98207 [2020-09-04 14:03:21,582 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 [2020-09-04 14:03:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98207 states. [2020-09-04 14:03:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98207 to 78445. [2020-09-04 14:03:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78445 states. [2020-09-04 14:03:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78445 states to 78445 states and 119373 transitions. [2020-09-04 14:03:25,985 INFO L78 Accepts]: Start accepts. Automaton has 78445 states and 119373 transitions. Word has length 336 [2020-09-04 14:03:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:25,986 INFO L479 AbstractCegarLoop]: Abstraction has 78445 states and 119373 transitions. [2020-09-04 14:03:25,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 78445 states and 119373 transitions. [2020-09-04 14:03:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-09-04 14:03:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:26,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:03:26,026 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1011511093, now seen corresponding path program 1 times [2020-09-04 14:03:26,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:26,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925248936] [2020-09-04 14:03:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:26,789 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:03:26,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:26,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925248936] [2020-09-04 14:03:26,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:26,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:26,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696355775] [2020-09-04 14:03:26,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:26,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:26,873 INFO L87 Difference]: Start difference. First operand 78445 states and 119373 transitions. Second operand 4 states. [2020-09-04 14:03:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:41,922 INFO L93 Difference]: Finished difference Result 191303 states and 292769 transitions. [2020-09-04 14:03:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:41,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-09-04 14:03:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:42,224 INFO L225 Difference]: With dead ends: 191303 [2020-09-04 14:03:42,224 INFO L226 Difference]: Without dead ends: 121215 [2020-09-04 14:03:42,271 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 [2020-09-04 14:03:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121215 states. [2020-09-04 14:03:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121215 to 105189. [2020-09-04 14:03:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105189 states. [2020-09-04 14:03:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105189 states to 105189 states and 162401 transitions. [2020-09-04 14:03:48,640 INFO L78 Accepts]: Start accepts. Automaton has 105189 states and 162401 transitions. Word has length 338 [2020-09-04 14:03:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:48,640 INFO L479 AbstractCegarLoop]: Abstraction has 105189 states and 162401 transitions. [2020-09-04 14:03:48,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 105189 states and 162401 transitions. [2020-09-04 14:03:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-09-04 14:03:48,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:48,682 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] [2020-09-04 14:03:48,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:03:48,683 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1179578371, now seen corresponding path program 1 times [2020-09-04 14:03:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:48,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416298380] [2020-09-04 14:03:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:49,341 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:03:49,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:49,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416298380] [2020-09-04 14:03:49,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:49,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:49,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806645749] [2020-09-04 14:03:49,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:49,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:49,527 INFO L87 Difference]: Start difference. First operand 105189 states and 162401 transitions. Second operand 4 states. [2020-09-04 14:04:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:12,544 INFO L93 Difference]: Finished difference Result 309621 states and 477629 transitions. [2020-09-04 14:04:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:12,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-09-04 14:04:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:12,836 INFO L225 Difference]: With dead ends: 309621 [2020-09-04 14:04:12,836 INFO L226 Difference]: Without dead ends: 207139 [2020-09-04 14:04:12,929 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 [2020-09-04 14:04:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207139 states. [2020-09-04 14:04:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207139 to 105517. [2020-09-04 14:04:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105517 states. [2020-09-04 14:04:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105517 states to 105517 states and 162839 transitions. [2020-09-04 14:04:23,545 INFO L78 Accepts]: Start accepts. Automaton has 105517 states and 162839 transitions. Word has length 338 [2020-09-04 14:04:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:23,545 INFO L479 AbstractCegarLoop]: Abstraction has 105517 states and 162839 transitions. [2020-09-04 14:04:23,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 105517 states and 162839 transitions. [2020-09-04 14:04:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-04 14:04:23,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:23,594 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] [2020-09-04 14:04:23,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:04:23,594 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2004623867, now seen corresponding path program 1 times [2020-09-04 14:04:23,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:23,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252523597] [2020-09-04 14:04:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:24,321 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:04:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:04:24,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252523597] [2020-09-04 14:04:24,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:24,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:24,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250775213] [2020-09-04 14:04:24,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:24,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:24,493 INFO L87 Difference]: Start difference. First operand 105517 states and 162839 transitions. Second operand 4 states. [2020-09-04 14:04:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:47,192 INFO L93 Difference]: Finished difference Result 309897 states and 477903 transitions. [2020-09-04 14:04:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:47,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-09-04 14:04:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:47,484 INFO L225 Difference]: With dead ends: 309897 [2020-09-04 14:04:47,484 INFO L226 Difference]: Without dead ends: 207435 [2020-09-04 14:04:47,579 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 [2020-09-04 14:04:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207435 states. [2020-09-04 14:04:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207435 to 105845. [2020-09-04 14:04:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105845 states. [2020-09-04 14:04:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105845 states to 105845 states and 163207 transitions. [2020-09-04 14:04:59,763 INFO L78 Accepts]: Start accepts. Automaton has 105845 states and 163207 transitions. Word has length 339 [2020-09-04 14:04:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:59,763 INFO L479 AbstractCegarLoop]: Abstraction has 105845 states and 163207 transitions. [2020-09-04 14:04:59,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 105845 states and 163207 transitions. [2020-09-04 14:04:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-04 14:04:59,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:59,805 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] [2020-09-04 14:04:59,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 14:04:59,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:59,806 INFO L82 PathProgramCache]: Analyzing trace with hash 130285857, now seen corresponding path program 1 times [2020-09-04 14:04:59,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:59,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978612622] [2020-09-04 14:04:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:00,755 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:05:00,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:05:00,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978612622] [2020-09-04 14:05:00,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:00,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:05:00,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261308591] [2020-09-04 14:05:00,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 14:05:00,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 14:05:00,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:05:00,940 INFO L87 Difference]: Start difference. First operand 105845 states and 163207 transitions. Second operand 6 states. [2020-09-04 14:05:01,544 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-04 14:05:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:14,828 INFO L93 Difference]: Finished difference Result 204153 states and 315228 transitions. [2020-09-04 14:05:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 14:05:14,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 339 [2020-09-04 14:05:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:14,962 INFO L225 Difference]: With dead ends: 204153 [2020-09-04 14:05:14,962 INFO L226 Difference]: Without dead ends: 105845 [2020-09-04 14:05:15,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-04 14:05:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105845 states. [2020-09-04 14:05:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105845 to 105845. [2020-09-04 14:05:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105845 states. [2020-09-04 14:05:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105845 states to 105845 states and 161901 transitions. [2020-09-04 14:05:22,763 INFO L78 Accepts]: Start accepts. Automaton has 105845 states and 161901 transitions. Word has length 339 [2020-09-04 14:05:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:22,764 INFO L479 AbstractCegarLoop]: Abstraction has 105845 states and 161901 transitions. [2020-09-04 14:05:22,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 14:05:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 105845 states and 161901 transitions. [2020-09-04 14:05:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-04 14:05:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:22,806 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] [2020-09-04 14:05:22,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 14:05:22,807 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 450094822, now seen corresponding path program 1 times [2020-09-04 14:05:22,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:22,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832294219] [2020-09-04 14:05:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:23,779 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:05:23,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:05:23,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832294219] [2020-09-04 14:05:23,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:23,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:05:23,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745795460] [2020-09-04 14:05:23,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:05:23,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:23,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:05:23,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:05:23,918 INFO L87 Difference]: Start difference. First operand 105845 states and 161901 transitions. Second operand 5 states. [2020-09-04 14:05:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:49,658 INFO L93 Difference]: Finished difference Result 311724 states and 476902 transitions. [2020-09-04 14:05:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:05:49,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-09-04 14:05:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:49,937 INFO L225 Difference]: With dead ends: 311724 [2020-09-04 14:05:49,937 INFO L226 Difference]: Without dead ends: 206710 [2020-09-04 14:05:50,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:05:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206710 states. [2020-09-04 14:06:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206710 to 206708. [2020-09-04 14:06:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206708 states. [2020-09-04 14:06:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206708 states to 206708 states and 314812 transitions. [2020-09-04 14:06:11,259 INFO L78 Accepts]: Start accepts. Automaton has 206708 states and 314812 transitions. Word has length 339 [2020-09-04 14:06:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:11,259 INFO L479 AbstractCegarLoop]: Abstraction has 206708 states and 314812 transitions. [2020-09-04 14:06:11,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:06:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 206708 states and 314812 transitions. [2020-09-04 14:06:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-09-04 14:06:11,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:11,344 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] [2020-09-04 14:06:11,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 14:06:11,344 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1313560112, now seen corresponding path program 1 times [2020-09-04 14:06:11,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:11,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258916373] [2020-09-04 14:06:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:12,238 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:06:12,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:12,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258916373] [2020-09-04 14:06:12,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:12,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:06:12,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687513201] [2020-09-04 14:06:12,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:06:12,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:06:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:06:12,321 INFO L87 Difference]: Start difference. First operand 206708 states and 314812 transitions. Second operand 5 states. [2020-09-04 14:06:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:37,620 INFO L93 Difference]: Finished difference Result 299649 states and 456173 transitions. [2020-09-04 14:06:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:06:37,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2020-09-04 14:06:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:37,883 INFO L225 Difference]: With dead ends: 299649 [2020-09-04 14:06:37,883 INFO L226 Difference]: Without dead ends: 206710 [2020-09-04 14:06:37,971 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 [2020-09-04 14:06:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206710 states. [2020-09-04 14:06:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206710 to 202446. [2020-09-04 14:06:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202446 states. [2020-09-04 14:06:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202446 states to 202446 states and 308628 transitions. [2020-09-04 14:06:58,619 INFO L78 Accepts]: Start accepts. Automaton has 202446 states and 308628 transitions. Word has length 340 [2020-09-04 14:06:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:58,620 INFO L479 AbstractCegarLoop]: Abstraction has 202446 states and 308628 transitions. [2020-09-04 14:06:58,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:06:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 202446 states and 308628 transitions. [2020-09-04 14:06:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-09-04 14:06:58,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:58,700 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] [2020-09-04 14:06:58,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 14:06:58,701 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1213258003, now seen corresponding path program 1 times [2020-09-04 14:06:58,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:58,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870000784] [2020-09-04 14:06:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:59,371 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:06:59,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:06:59,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870000784] [2020-09-04 14:06:59,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:59,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:06:59,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857338463] [2020-09-04 14:06:59,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:06:59,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:06:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:59,451 INFO L87 Difference]: Start difference. First operand 202446 states and 308628 transitions. Second operand 4 states. [2020-09-04 14:07:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:45,877 INFO L93 Difference]: Finished difference Result 603444 states and 919704 transitions. [2020-09-04 14:07:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:07:45,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-09-04 14:07:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:46,462 INFO L225 Difference]: With dead ends: 603444 [2020-09-04 14:07:46,462 INFO L226 Difference]: Without dead ends: 402612 [2020-09-04 14:07:46,636 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 [2020-09-04 14:07:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402612 states. [2020-09-04 14:08:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402612 to 202790. [2020-09-04 14:08:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202790 states. [2020-09-04 14:08:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202790 states to 202790 states and 308996 transitions. [2020-09-04 14:08:11,560 INFO L78 Accepts]: Start accepts. Automaton has 202790 states and 308996 transitions. Word has length 343 [2020-09-04 14:08:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:11,560 INFO L479 AbstractCegarLoop]: Abstraction has 202790 states and 308996 transitions. [2020-09-04 14:08:11,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:08:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 202790 states and 308996 transitions. [2020-09-04 14:08:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-09-04 14:08:11,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:11,641 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] [2020-09-04 14:08:11,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 14:08:11,642 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 810066552, now seen corresponding path program 1 times [2020-09-04 14:08:11,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:11,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025988366] [2020-09-04 14:08:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:12,445 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:08:12,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:08:12,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025988366] [2020-09-04 14:08:12,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:12,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:08:12,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923937365] [2020-09-04 14:08:12,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:08:12,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:08:12,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:08:12,572 INFO L87 Difference]: Start difference. First operand 202790 states and 308996 transitions. Second operand 4 states. [2020-09-04 14:09:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:01,593 INFO L93 Difference]: Finished difference Result 592389 states and 901493 transitions. [2020-09-04 14:09:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:09:01,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-09-04 14:09:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:02,187 INFO L225 Difference]: With dead ends: 592389 [2020-09-04 14:09:02,187 INFO L226 Difference]: Without dead ends: 394839 [2020-09-04 14:09:02,342 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 [2020-09-04 14:09:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394839 states. [2020-09-04 14:09:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394839 to 394837. [2020-09-04 14:09:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394837 states. [2020-09-04 14:09:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394837 states to 394837 states and 597833 transitions. [2020-09-04 14:09:44,481 INFO L78 Accepts]: Start accepts. Automaton has 394837 states and 597833 transitions. Word has length 343 [2020-09-04 14:09:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:44,481 INFO L479 AbstractCegarLoop]: Abstraction has 394837 states and 597833 transitions. [2020-09-04 14:09:44,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:09:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 394837 states and 597833 transitions. [2020-09-04 14:09:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-09-04 14:09:44,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:44,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:09:44,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 14:09:44,646 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1897294648, now seen corresponding path program 1 times [2020-09-04 14:09:44,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:44,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454282076] [2020-09-04 14:09:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:45,394 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-04 14:09:45,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:09:45,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454282076] [2020-09-04 14:09:45,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:45,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:09:45,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418414441] [2020-09-04 14:09:45,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:09:45,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:45,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:09:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:45,504 INFO L87 Difference]: Start difference. First operand 394837 states and 597833 transitions. Second operand 4 states. [2020-09-04 14:11:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:11:11,482 INFO L93 Difference]: Finished difference Result 1142997 states and 1728165 transitions. [2020-09-04 14:11:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:11:11,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-09-04 14:11:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:11:12,718 INFO L225 Difference]: With dead ends: 1142997 [2020-09-04 14:11:12,718 INFO L226 Difference]: Without dead ends: 750942 [2020-09-04 14:11:13,040 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 [2020-09-04 14:11:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750942 states.