/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 14:02:29,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 14:02:29,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 14:02:29,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 14:02:29,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 14:02:29,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 14:02:29,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 14:02:29,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 14:02:29,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 14:02:29,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 14:02:29,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 14:02:29,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 14:02:29,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 14:02:29,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 14:02:29,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 14:02:29,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 14:02:29,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 14:02:29,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 14:02:29,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 14:02:29,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 14:02:29,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 14:02:29,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 14:02:29,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 14:02:29,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 14:02:29,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 14:02:29,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 14:02:29,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 14:02:29,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 14:02:29,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 14:02:29,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 14:02:29,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 14:02:29,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 14:02:29,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 14:02:29,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 14:02:29,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 14:02:29,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 14:02:29,857 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 14:02:29,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 14:02:29,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 14:02:29,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 14:02:29,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 14:02:29,885 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 14:02:29,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 14:02:29,886 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 14:02:29,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 14:02:29,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 14:02:29,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 14:02:29,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 14:02:29,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 14:02:29,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 14:02:29,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 14:02:29,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 14:02:29,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 14:02:29,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 14:02:29,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 14:02:29,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 14:02:29,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 14:02:29,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 14:02:29,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 14:02:29,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 14:02:29,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 14:02:29,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 14:02:29,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 14:02:29,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 14:02:29,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 14:02:29,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 14:02:29,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 14:02:30,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 14:02:30,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 14:02:30,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 14:02:30,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 14:02:30,353 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 14:02:30,354 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-04 14:02:30,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6706a4d74/22ced1467b454c4fb92bb1ae95526169/FLAG3bf30e50b [2020-09-04 14:02:31,268 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 14:02:31,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-04 14:02:31,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6706a4d74/22ced1467b454c4fb92bb1ae95526169/FLAG3bf30e50b [2020-09-04 14:02:31,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6706a4d74/22ced1467b454c4fb92bb1ae95526169 [2020-09-04 14:02:31,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 14:02:31,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 14:02:31,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 14:02:31,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 14:02:31,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 14:02:31,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:02:31" (1/1) ... [2020-09-04 14:02:31,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510a549d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:31, skipping insertion in model container [2020-09-04 14:02:31,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 02:02:31" (1/1) ... [2020-09-04 14:02:31,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 14:02:32,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 14:02:33,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:02:33,714 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 14:02:34,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 14:02:34,892 INFO L208 MainTranslator]: Completed translation [2020-09-04 14:02:34,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34 WrapperNode [2020-09-04 14:02:34,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 14:02:34,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 14:02:34,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 14:02:34,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 14:02:34,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:34,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:34,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:34,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:35,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:35,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:35,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (1/1) ... [2020-09-04 14:02:35,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 14:02:35,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 14:02:35,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 14:02:35,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 14:02:35,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (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 14:02:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 14:02:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 14:02:35,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 14:02:35,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 14:02:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 14:02:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 14:02:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 14:02:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 14:02:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 14:02:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 14:02:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 14:02:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 14:02:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 14:02:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 14:02:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 14:02:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 14:02:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-04 14:02:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 14:02:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 14:02:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 14:02:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 14:02:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 14:02:39,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 14:02:39,810 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 14:02:39,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:02:39 BoogieIcfgContainer [2020-09-04 14:02:39,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 14:02:39,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 14:02:39,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 14:02:39,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 14:02:39,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 02:02:31" (1/3) ... [2020-09-04 14:02:39,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be88573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:02:39, skipping insertion in model container [2020-09-04 14:02:39,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 02:02:34" (2/3) ... [2020-09-04 14:02:39,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be88573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 02:02:39, skipping insertion in model container [2020-09-04 14:02:39,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 02:02:39" (3/3) ... [2020-09-04 14:02:39,836 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-04 14:02:39,847 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 14:02:39,859 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 14:02:39,880 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 14:02:39,919 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 14:02:39,919 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 14:02:39,919 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 14:02:39,919 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 14:02:39,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 14:02:39,920 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 14:02:39,920 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 14:02:39,920 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 14:02:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-09-04 14:02:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-04 14:02:40,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:40,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:02:40,025 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-09-04 14:02:40,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:40,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449371964] [2020-09-04 14:02:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:44,310 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:02:44,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:45,054 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 14:02:45,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449371964] [2020-09-04 14:02:45,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:45,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:02:45,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123032644] [2020-09-04 14:02:45,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:02:45,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:45,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:02:45,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:02:45,088 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-09-04 14:03:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:02,394 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2020-09-04 14:03:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 14:03:02,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-09-04 14:03:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:02,439 INFO L225 Difference]: With dead ends: 4236 [2020-09-04 14:03:02,439 INFO L226 Difference]: Without dead ends: 2814 [2020-09-04 14:03:02,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:03:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-09-04 14:03:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-09-04 14:03:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-09-04 14:03:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2020-09-04 14:03:02,670 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2020-09-04 14:03:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:02,672 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2020-09-04 14:03:02,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:03:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2020-09-04 14:03:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-09-04 14:03:02,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:02,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:02,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 14:03:02,690 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-09-04 14:03:02,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:02,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103138759] [2020-09-04 14:03:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:04,687 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:03:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:05,256 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 14:03:05,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103138759] [2020-09-04 14:03:05,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:05,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:05,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753796226] [2020-09-04 14:03:05,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:05,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:05,261 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states. [2020-09-04 14:03:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:25,496 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2020-09-04 14:03:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:25,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-09-04 14:03:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:25,528 INFO L225 Difference]: With dead ends: 8158 [2020-09-04 14:03:25,528 INFO L226 Difference]: Without dead ends: 5560 [2020-09-04 14:03:25,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-09-04 14:03:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2020-09-04 14:03:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2020-09-04 14:03:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2020-09-04 14:03:25,742 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2020-09-04 14:03:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:25,744 INFO L479 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2020-09-04 14:03:25,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2020-09-04 14:03:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-09-04 14:03:25,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:25,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:25,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 14:03:25,769 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times [2020-09-04 14:03:25,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:25,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532339104] [2020-09-04 14:03:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:26,997 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:03:26,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:27,319 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 14:03:27,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532339104] [2020-09-04 14:03:27,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:27,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:27,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162435098] [2020-09-04 14:03:27,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:27,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:27,333 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states. [2020-09-04 14:03:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:47,446 INFO L93 Difference]: Finished difference Result 16577 states and 27255 transitions. [2020-09-04 14:03:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:47,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-09-04 14:03:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:47,498 INFO L225 Difference]: With dead ends: 16577 [2020-09-04 14:03:47,498 INFO L226 Difference]: Without dead ends: 11071 [2020-09-04 14:03:47,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-09-04 14:03:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605. [2020-09-04 14:03:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-09-04 14:03:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions. [2020-09-04 14:03:47,779 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490 [2020-09-04 14:03:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:47,780 INFO L479 AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions. [2020-09-04 14:03:47,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions. [2020-09-04 14:03:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-09-04 14:03:47,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:47,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:03:47,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 14:03:47,800 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1982115813, now seen corresponding path program 1 times [2020-09-04 14:03:47,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:47,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881804909] [2020-09-04 14:03:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:49,326 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:03:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:03:49,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881804909] [2020-09-04 14:03:49,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:49,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:49,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083781483] [2020-09-04 14:03:49,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:49,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:49,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:49,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:49,697 INFO L87 Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states. [2020-09-04 14:04:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:10,076 INFO L93 Difference]: Finished difference Result 16140 states and 26444 transitions. [2020-09-04 14:04:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:10,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-09-04 14:04:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:10,119 INFO L225 Difference]: With dead ends: 16140 [2020-09-04 14:04:10,119 INFO L226 Difference]: Without dead ends: 10934 [2020-09-04 14:04:10,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2020-09-04 14:04:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10932. [2020-09-04 14:04:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10932 states. [2020-09-04 14:04:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 17885 transitions. [2020-09-04 14:04:10,600 INFO L78 Accepts]: Start accepts. Automaton has 10932 states and 17885 transitions. Word has length 491 [2020-09-04 14:04:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:10,601 INFO L479 AbstractCegarLoop]: Abstraction has 10932 states and 17885 transitions. [2020-09-04 14:04:10,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 10932 states and 17885 transitions. [2020-09-04 14:04:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-09-04 14:04:10,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:10,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:10,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 14:04:10,629 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2002117056, now seen corresponding path program 1 times [2020-09-04 14:04:10,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:10,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463199567] [2020-09-04 14:04:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:11,882 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:04:11,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:12,156 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 14:04:12,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463199567] [2020-09-04 14:04:12,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:12,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:12,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135475564] [2020-09-04 14:04:12,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:12,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:12,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:12,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:12,159 INFO L87 Difference]: Start difference. First operand 10932 states and 17885 transitions. Second operand 4 states. [2020-09-04 14:04:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:33,442 INFO L93 Difference]: Finished difference Result 32540 states and 53210 transitions. [2020-09-04 14:04:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:33,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-09-04 14:04:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:33,493 INFO L225 Difference]: With dead ends: 32540 [2020-09-04 14:04:33,493 INFO L226 Difference]: Without dead ends: 21752 [2020-09-04 14:04:33,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2020-09-04 14:04:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11030. [2020-09-04 14:04:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11030 states. [2020-09-04 14:04:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 18036 transitions. [2020-09-04 14:04:34,149 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 18036 transitions. Word has length 491 [2020-09-04 14:04:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:34,150 INFO L479 AbstractCegarLoop]: Abstraction has 11030 states and 18036 transitions. [2020-09-04 14:04:34,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 18036 transitions. [2020-09-04 14:04:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-09-04 14:04:34,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:34,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:34,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:04:34,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1954950484, now seen corresponding path program 1 times [2020-09-04 14:04:34,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:34,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383206753] [2020-09-04 14:04:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:35,347 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:04:35,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:35,594 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 14:04:35,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383206753] [2020-09-04 14:04:35,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:35,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:04:35,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186058079] [2020-09-04 14:04:35,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:04:35,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:04:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:35,606 INFO L87 Difference]: Start difference. First operand 11030 states and 18036 transitions. Second operand 4 states. [2020-09-04 14:04:57,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:57,660 INFO L93 Difference]: Finished difference Result 32675 states and 53391 transitions. [2020-09-04 14:04:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:04:57,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-09-04 14:04:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:57,698 INFO L225 Difference]: With dead ends: 32675 [2020-09-04 14:04:57,698 INFO L226 Difference]: Without dead ends: 21869 [2020-09-04 14:04:57,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:04:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-09-04 14:04:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11147. [2020-09-04 14:04:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11147 states. [2020-09-04 14:04:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 18182 transitions. [2020-09-04 14:04:58,212 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 18182 transitions. Word has length 492 [2020-09-04 14:04:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:58,212 INFO L479 AbstractCegarLoop]: Abstraction has 11147 states and 18182 transitions. [2020-09-04 14:04:58,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 18182 transitions. [2020-09-04 14:04:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:04:58,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:58,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:04:58,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:04:58,413 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1783853194, now seen corresponding path program 1 times [2020-09-04 14:04:58,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:58,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416175117] [2020-09-04 14:04:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:00,020 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:05:00,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:00,322 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 14:05:00,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416175117] [2020-09-04 14:05:00,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:00,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:05:00,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268628437] [2020-09-04 14:05:00,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:05:00,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:05:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:00,325 INFO L87 Difference]: Start difference. First operand 11147 states and 18182 transitions. Second operand 4 states. [2020-09-04 14:05:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:22,779 INFO L93 Difference]: Finished difference Result 31726 states and 51629 transitions. [2020-09-04 14:05:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:05:22,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-09-04 14:05:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:22,814 INFO L225 Difference]: With dead ends: 31726 [2020-09-04 14:05:22,814 INFO L226 Difference]: Without dead ends: 21548 [2020-09-04 14:05:22,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2020-09-04 14:05:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546. [2020-09-04 14:05:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21546 states. [2020-09-04 14:05:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 34987 transitions. [2020-09-04 14:05:23,650 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 34987 transitions. Word has length 493 [2020-09-04 14:05:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:23,651 INFO L479 AbstractCegarLoop]: Abstraction has 21546 states and 34987 transitions. [2020-09-04 14:05:23,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:05:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 34987 transitions. [2020-09-04 14:05:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:05:23,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:23,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:05:23,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:05:23,675 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1122991245, now seen corresponding path program 1 times [2020-09-04 14:05:23,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:23,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896445561] [2020-09-04 14:05:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:26,983 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:05:26,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:27,187 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 14:05:27,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896445561] [2020-09-04 14:05:27,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:27,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:05:27,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208619585] [2020-09-04 14:05:27,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:05:27,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:05:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:05:27,189 INFO L87 Difference]: Start difference. First operand 21546 states and 34987 transitions. Second operand 5 states. [2020-09-04 14:05:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:05:44,698 INFO L93 Difference]: Finished difference Result 50854 states and 83138 transitions. [2020-09-04 14:05:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:05:44,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-09-04 14:05:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:05:44,738 INFO L225 Difference]: With dead ends: 50854 [2020-09-04 14:05:44,738 INFO L226 Difference]: Without dead ends: 26010 [2020-09-04 14:05:44,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:05:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2020-09-04 14:05:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 26008. [2020-09-04 14:05:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26008 states. [2020-09-04 14:05:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 42390 transitions. [2020-09-04 14:05:45,694 INFO L78 Accepts]: Start accepts. Automaton has 26008 states and 42390 transitions. Word has length 493 [2020-09-04 14:05:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:05:45,694 INFO L479 AbstractCegarLoop]: Abstraction has 26008 states and 42390 transitions. [2020-09-04 14:05:45,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:05:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26008 states and 42390 transitions. [2020-09-04 14:05:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-04 14:05:45,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:05:45,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:05:45,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:05:45,719 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:05:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:05:45,720 INFO L82 PathProgramCache]: Analyzing trace with hash -979225654, now seen corresponding path program 1 times [2020-09-04 14:05:45,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:05:45,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841892587] [2020-09-04 14:05:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:05:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:47,247 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:05:47,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:05:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:05:47,679 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 14:05:47,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841892587] [2020-09-04 14:05:47,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:05:47,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:05:47,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056321774] [2020-09-04 14:05:47,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:05:47,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:05:47,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:05:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:05:47,684 INFO L87 Difference]: Start difference. First operand 26008 states and 42390 transitions. Second operand 4 states. [2020-09-04 14:06:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:03,449 INFO L93 Difference]: Finished difference Result 46676 states and 75064 transitions. [2020-09-04 14:06:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:06:03,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-09-04 14:06:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:03,504 INFO L225 Difference]: With dead ends: 46676 [2020-09-04 14:06:03,505 INFO L226 Difference]: Without dead ends: 33210 [2020-09-04 14:06:03,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33210 states. [2020-09-04 14:06:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33210 to 29048. [2020-09-04 14:06:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29048 states. [2020-09-04 14:06:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29048 states to 29048 states and 47370 transitions. [2020-09-04 14:06:04,806 INFO L78 Accepts]: Start accepts. Automaton has 29048 states and 47370 transitions. Word has length 493 [2020-09-04 14:06:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:04,806 INFO L479 AbstractCegarLoop]: Abstraction has 29048 states and 47370 transitions. [2020-09-04 14:06:04,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:06:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 29048 states and 47370 transitions. [2020-09-04 14:06:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-09-04 14:06:04,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:04,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:06:04,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:06:04,832 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash 175584375, now seen corresponding path program 1 times [2020-09-04 14:06:04,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:04,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883832788] [2020-09-04 14:06:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:06,406 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:06:06,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:06,710 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 14:06:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883832788] [2020-09-04 14:06:06,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:06,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:06:06,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778932632] [2020-09-04 14:06:06,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:06:06,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:06:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:06,712 INFO L87 Difference]: Start difference. First operand 29048 states and 47370 transitions. Second operand 4 states. [2020-09-04 14:06:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:31,030 INFO L93 Difference]: Finished difference Result 85137 states and 138885 transitions. [2020-09-04 14:06:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:06:31,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-09-04 14:06:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:31,114 INFO L225 Difference]: With dead ends: 85137 [2020-09-04 14:06:31,115 INFO L226 Difference]: Without dead ends: 57109 [2020-09-04 14:06:31,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57109 states. [2020-09-04 14:06:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57109 to 57107. [2020-09-04 14:06:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57107 states. [2020-09-04 14:06:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57107 states to 57107 states and 92799 transitions. [2020-09-04 14:06:33,465 INFO L78 Accepts]: Start accepts. Automaton has 57107 states and 92799 transitions. Word has length 495 [2020-09-04 14:06:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:33,466 INFO L479 AbstractCegarLoop]: Abstraction has 57107 states and 92799 transitions. [2020-09-04 14:06:33,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:06:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 57107 states and 92799 transitions. [2020-09-04 14:06:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-09-04 14:06:33,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:33,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:33,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:06:33,523 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times [2020-09-04 14:06:33,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:33,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887828182] [2020-09-04 14:06:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:35,181 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:06:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:35,353 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 14:06:35,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887828182] [2020-09-04 14:06:35,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:35,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:06:35,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350442829] [2020-09-04 14:06:35,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:06:35,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:06:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:35,355 INFO L87 Difference]: Start difference. First operand 57107 states and 92799 transitions. Second operand 4 states. [2020-09-04 14:06:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:53,158 INFO L93 Difference]: Finished difference Result 104503 states and 168401 transitions. [2020-09-04 14:06:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:06:53,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-09-04 14:06:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:53,248 INFO L225 Difference]: With dead ends: 104503 [2020-09-04 14:06:53,248 INFO L226 Difference]: Without dead ends: 74421 [2020-09-04 14:06:53,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:06:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74421 states. [2020-09-04 14:06:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74421 to 67987. [2020-09-04 14:06:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67987 states. [2020-09-04 14:06:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 110671 transitions. [2020-09-04 14:06:58,623 INFO L78 Accepts]: Start accepts. Automaton has 67987 states and 110671 transitions. Word has length 495 [2020-09-04 14:06:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:58,624 INFO L479 AbstractCegarLoop]: Abstraction has 67987 states and 110671 transitions. [2020-09-04 14:06:58,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:06:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 67987 states and 110671 transitions. [2020-09-04 14:06:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-09-04 14:06:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:58,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:06:58,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:06:58,665 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -925741270, now seen corresponding path program 1 times [2020-09-04 14:06:58,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:58,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400569207] [2020-09-04 14:06:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:59,992 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:06:59,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:00,155 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 14:07:00,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400569207] [2020-09-04 14:07:00,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:00,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:07:00,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343590336] [2020-09-04 14:07:00,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:07:00,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:00,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:07:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:00,158 INFO L87 Difference]: Start difference. First operand 67987 states and 110671 transitions. Second operand 4 states. [2020-09-04 14:07:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:18,532 INFO L93 Difference]: Finished difference Result 199213 states and 324043 transitions. [2020-09-04 14:07:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:07:18,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-09-04 14:07:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:18,686 INFO L225 Difference]: With dead ends: 199213 [2020-09-04 14:07:18,686 INFO L226 Difference]: Without dead ends: 133619 [2020-09-04 14:07:18,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:07:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133619 states. [2020-09-04 14:07:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133619 to 68377. [2020-09-04 14:07:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68377 states. [2020-09-04 14:07:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68377 states to 68377 states and 111247 transitions. [2020-09-04 14:07:22,466 INFO L78 Accepts]: Start accepts. Automaton has 68377 states and 111247 transitions. Word has length 496 [2020-09-04 14:07:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:22,466 INFO L479 AbstractCegarLoop]: Abstraction has 68377 states and 111247 transitions. [2020-09-04 14:07:22,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:07:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 68377 states and 111247 transitions. [2020-09-04 14:07:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-09-04 14:07:22,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:22,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:07:22,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:07:22,503 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:22,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1131533936, now seen corresponding path program 1 times [2020-09-04 14:07:22,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:22,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730826835] [2020-09-04 14:07:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:24,526 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:07:24,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:07:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:07:26,938 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 14:07:26,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730826835] [2020-09-04 14:07:26,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:07:26,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 14:07:26,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559653437] [2020-09-04 14:07:26,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 14:07:26,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:07:26,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 14:07:26,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 14:07:26,941 INFO L87 Difference]: Start difference. First operand 68377 states and 111247 transitions. Second operand 9 states. [2020-09-04 14:07:28,110 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 408 [2020-09-04 14:07:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:52,326 INFO L93 Difference]: Finished difference Result 152196 states and 245928 transitions. [2020-09-04 14:07:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 14:07:52,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 496 [2020-09-04 14:07:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:52,437 INFO L225 Difference]: With dead ends: 152196 [2020-09-04 14:07:52,437 INFO L226 Difference]: Without dead ends: 109842 [2020-09-04 14:07:52,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-09-04 14:07:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109842 states. [2020-09-04 14:07:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109842 to 80321. [2020-09-04 14:07:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80321 states. [2020-09-04 14:07:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80321 states to 80321 states and 128735 transitions. [2020-09-04 14:07:58,920 INFO L78 Accepts]: Start accepts. Automaton has 80321 states and 128735 transitions. Word has length 496 [2020-09-04 14:07:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:07:58,920 INFO L479 AbstractCegarLoop]: Abstraction has 80321 states and 128735 transitions. [2020-09-04 14:07:58,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 14:07:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 80321 states and 128735 transitions. [2020-09-04 14:07:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-09-04 14:07:58,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:07:58,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:07:58,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:07:58,965 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:07:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:07:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 43078897, now seen corresponding path program 1 times [2020-09-04 14:07:58,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:07:58,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695706746] [2020-09-04 14:07:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:07:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:00,983 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:08:00,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:01,257 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 14:08:01,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695706746] [2020-09-04 14:08:01,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:01,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:08:01,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993057524] [2020-09-04 14:08:01,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:08:01,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:08:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:08:01,259 INFO L87 Difference]: Start difference. First operand 80321 states and 128735 transitions. Second operand 5 states. [2020-09-04 14:08:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:08:30,905 INFO L93 Difference]: Finished difference Result 234928 states and 376472 transitions. [2020-09-04 14:08:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:08:30,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-09-04 14:08:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:08:31,070 INFO L225 Difference]: With dead ends: 234928 [2020-09-04 14:08:31,071 INFO L226 Difference]: Without dead ends: 156163 [2020-09-04 14:08:31,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:08:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156163 states. [2020-09-04 14:08:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156163 to 156161. [2020-09-04 14:08:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156161 states. [2020-09-04 14:08:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156161 states to 156161 states and 249477 transitions. [2020-09-04 14:08:41,749 INFO L78 Accepts]: Start accepts. Automaton has 156161 states and 249477 transitions. Word has length 496 [2020-09-04 14:08:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:41,749 INFO L479 AbstractCegarLoop]: Abstraction has 156161 states and 249477 transitions. [2020-09-04 14:08:41,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:08:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 156161 states and 249477 transitions. [2020-09-04 14:08:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-09-04 14:08:41,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:41,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:08:41,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:08:41,835 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash 775267711, now seen corresponding path program 1 times [2020-09-04 14:08:41,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:41,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816331193] [2020-09-04 14:08:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:43,963 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:08:43,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:44,118 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 14:08:44,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816331193] [2020-09-04 14:08:44,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:44,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:08:44,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006368031] [2020-09-04 14:08:44,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:08:44,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:08:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:08:44,120 INFO L87 Difference]: Start difference. First operand 156161 states and 249477 transitions. Second operand 5 states. [2020-09-04 14:09:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:16,456 INFO L93 Difference]: Finished difference Result 358147 states and 574286 transitions. [2020-09-04 14:09:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:09:16,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-09-04 14:09:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:16,636 INFO L225 Difference]: With dead ends: 358147 [2020-09-04 14:09:16,636 INFO L226 Difference]: Without dead ends: 181401 [2020-09-04 14:09:16,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:09:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181401 states. [2020-09-04 14:09:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181401 to 181399. [2020-09-04 14:09:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181399 states. [2020-09-04 14:09:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181399 states to 181399 states and 290084 transitions. [2020-09-04 14:09:31,408 INFO L78 Accepts]: Start accepts. Automaton has 181399 states and 290084 transitions. Word has length 497 [2020-09-04 14:09:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:31,408 INFO L479 AbstractCegarLoop]: Abstraction has 181399 states and 290084 transitions. [2020-09-04 14:09:31,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:09:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 181399 states and 290084 transitions. [2020-09-04 14:09:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-09-04 14:09:31,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:31,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:31,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:09:31,522 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1196309607, now seen corresponding path program 1 times [2020-09-04 14:09:31,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:31,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482721372] [2020-09-04 14:09:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:35,923 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:09:35,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:36,167 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 14:09:36,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482721372] [2020-09-04 14:09:36,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:36,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:09:36,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731498573] [2020-09-04 14:09:36,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:09:36,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:09:36,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:09:36,171 INFO L87 Difference]: Start difference. First operand 181399 states and 290084 transitions. Second operand 4 states. [2020-09-04 14:10:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:10:22,388 INFO L93 Difference]: Finished difference Result 525060 states and 838570 transitions. [2020-09-04 14:10:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:10:22,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-09-04 14:10:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:10:22,790 INFO L225 Difference]: With dead ends: 525060 [2020-09-04 14:10:22,790 INFO L226 Difference]: Without dead ends: 353508 [2020-09-04 14:10:22,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:10:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353508 states. [2020-09-04 14:10:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353508 to 353506. [2020-09-04 14:10:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353506 states. [2020-09-04 14:10:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353506 states to 353506 states and 563271 transitions. [2020-09-04 14:10:54,035 INFO L78 Accepts]: Start accepts. Automaton has 353506 states and 563271 transitions. Word has length 498 [2020-09-04 14:10:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:10:54,035 INFO L479 AbstractCegarLoop]: Abstraction has 353506 states and 563271 transitions. [2020-09-04 14:10:54,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:10:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 353506 states and 563271 transitions. [2020-09-04 14:10:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-09-04 14:10:54,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:10:54,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:10:54,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:10:54,280 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:10:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:10:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash 532673534, now seen corresponding path program 1 times [2020-09-04 14:10:54,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:10:54,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359838271] [2020-09-04 14:10:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:10:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:56,078 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:10:56,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:10:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:10:56,321 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 14:10:56,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359838271] [2020-09-04 14:10:56,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:10:56,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:10:56,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009518924] [2020-09-04 14:10:56,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:10:56,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:10:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:10:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:10:56,324 INFO L87 Difference]: Start difference. First operand 353506 states and 563271 transitions. Second operand 5 states. [2020-09-04 14:12:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:12:51,251 INFO L93 Difference]: Finished difference Result 1291851 states and 2048938 transitions. [2020-09-04 14:12:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 14:12:51,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-09-04 14:12:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:12:52,577 INFO L225 Difference]: With dead ends: 1291851 [2020-09-04 14:12:52,577 INFO L226 Difference]: Without dead ends: 959785 [2020-09-04 14:12:52,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:12:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959785 states. [2020-09-04 14:13:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959785 to 364897. [2020-09-04 14:13:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364897 states. [2020-09-04 14:13:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364897 states to 364897 states and 582047 transitions. [2020-09-04 14:13:31,628 INFO L78 Accepts]: Start accepts. Automaton has 364897 states and 582047 transitions. Word has length 499 [2020-09-04 14:13:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:13:31,628 INFO L479 AbstractCegarLoop]: Abstraction has 364897 states and 582047 transitions. [2020-09-04 14:13:31,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:13:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 364897 states and 582047 transitions. [2020-09-04 14:13:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-09-04 14:13:31,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:13:31,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:13:31,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 14:13:31,872 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:13:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:13:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1152099056, now seen corresponding path program 1 times [2020-09-04 14:13:31,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:13:31,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192656197] [2020-09-04 14:13:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:13:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:13:33,331 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 403 [2020-09-04 14:13:33,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:13:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:13:39,183 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 14:13:39,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192656197] [2020-09-04 14:13:39,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:13:39,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:13:39,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656190543] [2020-09-04 14:13:39,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:13:39,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:13:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:13:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:13:39,185 INFO L87 Difference]: Start difference. First operand 364897 states and 582047 transitions. Second operand 4 states. [2020-09-04 14:14:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:14:36,810 INFO L93 Difference]: Finished difference Result 703141 states and 1115233 transitions. [2020-09-04 14:14:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:14:36,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-09-04 14:14:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:14:37,401 INFO L225 Difference]: With dead ends: 703141 [2020-09-04 14:14:37,401 INFO L226 Difference]: Without dead ends: 500611 [2020-09-04 14:14:37,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12