/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:58:31,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:58:31,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:58:31,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:58:31,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:58:31,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:58:31,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:58:31,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:58:31,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:58:31,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:58:31,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:58:31,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:58:31,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:58:31,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:58:31,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:58:31,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:58:31,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:58:31,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:58:31,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:58:31,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:58:31,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:58:31,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:58:31,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:58:31,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:58:32,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:58:32,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:58:32,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:58:32,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:58:32,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:58:32,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:58:32,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:58:32,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:58:32,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:58:32,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:58:32,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:58:32,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:58:32,026 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 13:58:32,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:58:32,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:58:32,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:58:32,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:58:32,071 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:58:32,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:58:32,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:58:32,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:58:32,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:58:32,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:58:32,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:58:32,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:58:32,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:58:32,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:58:32,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:58:32,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:58:32,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:58:32,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:58:32,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:58:32,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:58:32,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:58:32,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:58:32,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:58:32,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:58:32,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:58:32,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:58:32,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:58:32,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:58:32,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:58:32,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:58:32,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:58:32,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:58:32,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:58:32,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:58:32,549 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:58:32,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 13:58:32,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bd65a298/7b10b44548d34d28bae3a525146c2b23/FLAGe60507b19 [2020-09-04 13:58:33,407 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:58:33,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 13:58:33,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bd65a298/7b10b44548d34d28bae3a525146c2b23/FLAGe60507b19 [2020-09-04 13:58:33,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bd65a298/7b10b44548d34d28bae3a525146c2b23 [2020-09-04 13:58:33,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:58:33,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:58:33,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:58:33,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:58:33,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:58:33,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:58:33" (1/1) ... [2020-09-04 13:58:33,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f2e0c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:33, skipping insertion in model container [2020-09-04 13:58:33,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:58:33" (1/1) ... [2020-09-04 13:58:33,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:58:33,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:58:35,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:58:35,236 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:58:36,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:58:36,699 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:58:36,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36 WrapperNode [2020-09-04 13:58:36,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:58:36,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:58:36,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:58:36,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:58:36,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (1/1) ... [2020-09-04 13:58:36,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:58:36,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:58:36,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:58:36,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:58:36,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (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 13:58:37,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:58:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:58:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:58:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:58:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:58:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 13:58:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-04 13:58:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 13:58:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 13:58:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:58:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:58:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 13:58:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 13:58:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 13:58:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 13:58:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 13:58:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-04 13:58:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-04 13:58:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 13:58:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 13:58:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:58:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:58:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:58:40,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:58:40,893 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:58:40,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:58:40 BoogieIcfgContainer [2020-09-04 13:58:40,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:58:40,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:58:40,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:58:40,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:58:40,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:58:33" (1/3) ... [2020-09-04 13:58:40,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ea38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:58:40, skipping insertion in model container [2020-09-04 13:58:40,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:58:36" (2/3) ... [2020-09-04 13:58:40,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ea38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:58:40, skipping insertion in model container [2020-09-04 13:58:40,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:58:40" (3/3) ... [2020-09-04 13:58:40,916 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 13:58:40,928 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:58:40,939 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:58:40,962 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:58:40,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:58:40,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:58:40,999 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:58:40,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:58:40,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:58:40,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:58:40,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:58:40,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:58:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-09-04 13:58:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-04 13:58:41,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:58:41,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:58:41,092 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:58:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:58:41,100 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-09-04 13:58:41,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:58:41,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066326142] [2020-09-04 13:58:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:58:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:44,425 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 13:58:44,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:58:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:44,770 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 13:58:44,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066326142] [2020-09-04 13:58:44,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:58:44,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:58:44,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036783553] [2020-09-04 13:58:44,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:58:44,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:58:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:58:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:58:44,803 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-09-04 13:58:45,722 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-09-04 13:58:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:58:55,573 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-09-04 13:58:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:58:55,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-09-04 13:58:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:58:55,617 INFO L225 Difference]: With dead ends: 2262 [2020-09-04 13:58:55,617 INFO L226 Difference]: Without dead ends: 1993 [2020-09-04 13:58:55,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:58:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-09-04 13:58:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-09-04 13:58:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-09-04 13:58:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-09-04 13:58:55,798 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-09-04 13:58:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:58:55,800 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-09-04 13:58:55,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:58:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-09-04 13:58:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-04 13:58:55,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:58:55,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:58:55,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:58:55,818 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:58:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:58:55,819 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-09-04 13:58:55,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:58:55,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845795060] [2020-09-04 13:58:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:58:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:58,284 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 13:58:58,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:58:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:58:59,106 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 13:58:59,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845795060] [2020-09-04 13:58:59,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:58:59,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:58:59,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53098808] [2020-09-04 13:58:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:58:59,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:58:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:58:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:58:59,113 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-09-04 13:59:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:59:14,158 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-09-04 13:59:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:59:14,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-09-04 13:59:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:59:14,193 INFO L225 Difference]: With dead ends: 5904 [2020-09-04 13:59:14,195 INFO L226 Difference]: Without dead ends: 3930 [2020-09-04 13:59:14,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:59:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-09-04 13:59:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-09-04 13:59:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-09-04 13:59:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-09-04 13:59:14,380 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-09-04 13:59:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:59:14,381 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-09-04 13:59:14,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:59:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-09-04 13:59:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-09-04 13:59:14,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:59:14,403 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] [2020-09-04 13:59:14,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:59:14,403 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:59:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:59:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-09-04 13:59:14,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:59:14,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778358221] [2020-09-04 13:59:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:59:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:15,911 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 13:59:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:59:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:59:16,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778358221] [2020-09-04 13:59:16,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:59:16,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:59:16,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377070413] [2020-09-04 13:59:16,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:59:16,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:59:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:59:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:59:16,465 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-09-04 13:59:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:59:33,854 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-09-04 13:59:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:59:33,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-09-04 13:59:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:59:33,888 INFO L225 Difference]: With dead ends: 11482 [2020-09-04 13:59:33,888 INFO L226 Difference]: Without dead ends: 7768 [2020-09-04 13:59:33,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:59:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-09-04 13:59:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-09-04 13:59:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-09-04 13:59:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-09-04 13:59:34,179 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-09-04 13:59:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:59:34,180 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-09-04 13:59:34,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:59:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-09-04 13:59:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-09-04 13:59:34,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:59:34,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:59:34,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:59:34,203 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:59:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:59:34,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-09-04 13:59:34,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:59:34,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883445662] [2020-09-04 13:59:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:59:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:35,336 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 13:59:35,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:59:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:35,553 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 13:59:35,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883445662] [2020-09-04 13:59:35,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:59:35,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:59:35,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891974404] [2020-09-04 13:59:35,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:59:35,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:59:35,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:59:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:59:35,556 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states. [2020-09-04 13:59:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:59:53,699 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-09-04 13:59:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:59:53,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-09-04 13:59:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:59:53,759 INFO L225 Difference]: With dead ends: 23201 [2020-09-04 13:59:53,760 INFO L226 Difference]: Without dead ends: 15487 [2020-09-04 13:59:53,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:59:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-09-04 13:59:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-09-04 13:59:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-09-04 13:59:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-09-04 13:59:54,152 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-09-04 13:59:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:59:54,152 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-09-04 13:59:54,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:59:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-09-04 13:59:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-09-04 13:59:54,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:59:54,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:59:54,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:59:54,172 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:59:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:59:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-09-04 13:59:54,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:59:54,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757630074] [2020-09-04 13:59:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:59:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:55,642 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 13:59:55,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:59:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:59:55,930 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 13:59:55,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757630074] [2020-09-04 13:59:55,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:59:55,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:59:55,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286565484] [2020-09-04 13:59:55,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:59:55,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:59:55,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:59:55,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:59:55,933 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-09-04 14:00:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:14,533 INFO L93 Difference]: Finished difference Result 22716 states and 36476 transitions. [2020-09-04 14:00:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:00:14,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-09-04 14:00:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:14,565 INFO L225 Difference]: With dead ends: 22716 [2020-09-04 14:00:14,565 INFO L226 Difference]: Without dead ends: 15302 [2020-09-04 14:00:14,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2020-09-04 14:00:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15300. [2020-09-04 14:00:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15300 states. [2020-09-04 14:00:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15300 states to 15300 states and 24521 transitions. [2020-09-04 14:00:15,173 INFO L78 Accepts]: Start accepts. Automaton has 15300 states and 24521 transitions. Word has length 480 [2020-09-04 14:00:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:15,174 INFO L479 AbstractCegarLoop]: Abstraction has 15300 states and 24521 transitions. [2020-09-04 14:00:15,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15300 states and 24521 transitions. [2020-09-04 14:00:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-09-04 14:00:15,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:15,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:15,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 14:00:15,201 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash -342175906, now seen corresponding path program 1 times [2020-09-04 14:00:15,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:15,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155067900] [2020-09-04 14:00:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:16,236 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:00:16,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:16,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155067900] [2020-09-04 14:00:16,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:16,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:16,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354776236] [2020-09-04 14:00:16,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:16,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:16,409 INFO L87 Difference]: Start difference. First operand 15300 states and 24521 transitions. Second operand 4 states. [2020-09-04 14:00:35,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:35,969 INFO L93 Difference]: Finished difference Result 45644 states and 73118 transitions. [2020-09-04 14:00:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:00:35,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-09-04 14:00:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:36,043 INFO L225 Difference]: With dead ends: 45644 [2020-09-04 14:00:36,043 INFO L226 Difference]: Without dead ends: 30488 [2020-09-04 14:00:36,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-09-04 14:00:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15398. [2020-09-04 14:00:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-09-04 14:00:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 24672 transitions. [2020-09-04 14:00:36,814 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 24672 transitions. Word has length 480 [2020-09-04 14:00:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:36,814 INFO L479 AbstractCegarLoop]: Abstraction has 15398 states and 24672 transitions. [2020-09-04 14:00:36,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 24672 transitions. [2020-09-04 14:00:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-09-04 14:00:36,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:36,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 14:00:36,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 14:00:36,840 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1081253375, now seen corresponding path program 1 times [2020-09-04 14:00:36,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:36,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952467478] [2020-09-04 14:00:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:37,815 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:00:37,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:00:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:00:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:00:38,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952467478] [2020-09-04 14:00:38,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:00:38,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:00:38,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403565751] [2020-09-04 14:00:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:00:38,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:00:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:00:38,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:38,025 INFO L87 Difference]: Start difference. First operand 15398 states and 24672 transitions. Second operand 4 states. [2020-09-04 14:00:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:00:58,527 INFO L93 Difference]: Finished difference Result 45779 states and 73299 transitions. [2020-09-04 14:00:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:00:58,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-09-04 14:00:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:00:58,571 INFO L225 Difference]: With dead ends: 45779 [2020-09-04 14:00:58,572 INFO L226 Difference]: Without dead ends: 30605 [2020-09-04 14:00:58,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:00:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-09-04 14:00:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15515. [2020-09-04 14:00:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2020-09-04 14:00:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 24818 transitions. [2020-09-04 14:00:59,279 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 24818 transitions. Word has length 481 [2020-09-04 14:00:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:00:59,280 INFO L479 AbstractCegarLoop]: Abstraction has 15515 states and 24818 transitions. [2020-09-04 14:00:59,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:00:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 24818 transitions. [2020-09-04 14:00:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-09-04 14:00:59,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:00:59,299 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] [2020-09-04 14:00:59,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 14:00:59,300 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:00:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:00:59,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1552601612, now seen corresponding path program 1 times [2020-09-04 14:00:59,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:00:59,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232097889] [2020-09-04 14:00:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:00:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:00,946 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:01:00,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:01,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232097889] [2020-09-04 14:01:01,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:01,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:01,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843073771] [2020-09-04 14:01:01,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:01,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:01,372 INFO L87 Difference]: Start difference. First operand 15515 states and 24818 transitions. Second operand 4 states. [2020-09-04 14:01:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:22,135 INFO L93 Difference]: Finished difference Result 44734 states and 71393 transitions. [2020-09-04 14:01:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:01:22,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-09-04 14:01:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:22,182 INFO L225 Difference]: With dead ends: 44734 [2020-09-04 14:01:22,183 INFO L226 Difference]: Without dead ends: 30188 [2020-09-04 14:01:22,210 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 14:01:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30188 states. [2020-09-04 14:01:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30188 to 30186. [2020-09-04 14:01:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2020-09-04 14:01:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 48059 transitions. [2020-09-04 14:01:24,175 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 48059 transitions. Word has length 482 [2020-09-04 14:01:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:24,176 INFO L479 AbstractCegarLoop]: Abstraction has 30186 states and 48059 transitions. [2020-09-04 14:01:24,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:01:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 48059 transitions. [2020-09-04 14:01:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-09-04 14:01:24,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:24,203 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] [2020-09-04 14:01:24,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 14:01:24,203 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104209, now seen corresponding path program 1 times [2020-09-04 14:01:24,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:24,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050120099] [2020-09-04 14:01:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:26,338 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:01:26,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:26,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050120099] [2020-09-04 14:01:26,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:26,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:01:26,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195002128] [2020-09-04 14:01:26,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:01:26,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:01:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:01:26,691 INFO L87 Difference]: Start difference. First operand 30186 states and 48059 transitions. Second operand 5 states. [2020-09-04 14:01:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:01:43,482 INFO L93 Difference]: Finished difference Result 67902 states and 108914 transitions. [2020-09-04 14:01:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:01:43,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 482 [2020-09-04 14:01:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:01:43,525 INFO L225 Difference]: With dead ends: 67902 [2020-09-04 14:01:43,525 INFO L226 Difference]: Without dead ends: 34534 [2020-09-04 14:01:43,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:01:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34534 states. [2020-09-04 14:01:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34534 to 34532. [2020-09-04 14:01:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34532 states. [2020-09-04 14:01:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34532 states to 34532 states and 55222 transitions. [2020-09-04 14:01:45,036 INFO L78 Accepts]: Start accepts. Automaton has 34532 states and 55222 transitions. Word has length 482 [2020-09-04 14:01:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:01:45,037 INFO L479 AbstractCegarLoop]: Abstraction has 34532 states and 55222 transitions. [2020-09-04 14:01:45,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:01:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 34532 states and 55222 transitions. [2020-09-04 14:01:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-09-04 14:01:45,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:01:45,077 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] [2020-09-04 14:01:45,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 14:01:45,077 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:01:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:01:45,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1612954702, now seen corresponding path program 1 times [2020-09-04 14:01:45,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:01:45,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883435038] [2020-09-04 14:01:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:01:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:46,466 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:01:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:01:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:01:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 14:01:47,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883435038] [2020-09-04 14:01:47,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:01:47,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:01:47,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581583357] [2020-09-04 14:01:47,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:01:47,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:01:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:01:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:01:47,003 INFO L87 Difference]: Start difference. First operand 34532 states and 55222 transitions. Second operand 4 states. [2020-09-04 14:02:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:09,923 INFO L93 Difference]: Finished difference Result 101493 states and 162313 transitions. [2020-09-04 14:02:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:09,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-09-04 14:02:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:09,991 INFO L225 Difference]: With dead ends: 101493 [2020-09-04 14:02:09,991 INFO L226 Difference]: Without dead ends: 67981 [2020-09-04 14:02:10,024 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 14:02:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67981 states. [2020-09-04 14:02:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67981 to 67979. [2020-09-04 14:02:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67979 states. [2020-09-04 14:02:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 108295 transitions. [2020-09-04 14:02:12,840 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 108295 transitions. Word has length 484 [2020-09-04 14:02:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:12,840 INFO L479 AbstractCegarLoop]: Abstraction has 67979 states and 108295 transitions. [2020-09-04 14:02:12,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 108295 transitions. [2020-09-04 14:02:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-09-04 14:02:12,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:12,913 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] [2020-09-04 14:02:12,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 14:02:12,913 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2030409168, now seen corresponding path program 1 times [2020-09-04 14:02:12,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:12,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259861234] [2020-09-04 14:02:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:14,086 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:02:14,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:14,390 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 14:02:14,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259861234] [2020-09-04 14:02:14,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:14,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:14,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333466042] [2020-09-04 14:02:14,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:14,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:14,394 INFO L87 Difference]: Start difference. First operand 67979 states and 108295 transitions. Second operand 4 states. [2020-09-04 14:02:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:02:31,968 INFO L93 Difference]: Finished difference Result 199189 states and 316915 transitions. [2020-09-04 14:02:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:02:31,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-09-04 14:02:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:02:32,098 INFO L225 Difference]: With dead ends: 199189 [2020-09-04 14:02:32,099 INFO L226 Difference]: Without dead ends: 133603 [2020-09-04 14:02:32,154 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 14:02:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133603 states. [2020-09-04 14:02:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133603 to 68369. [2020-09-04 14:02:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68369 states. [2020-09-04 14:02:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68369 states to 68369 states and 108871 transitions. [2020-09-04 14:02:35,545 INFO L78 Accepts]: Start accepts. Automaton has 68369 states and 108871 transitions. Word has length 485 [2020-09-04 14:02:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:02:35,545 INFO L479 AbstractCegarLoop]: Abstraction has 68369 states and 108871 transitions. [2020-09-04 14:02:35,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:02:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 68369 states and 108871 transitions. [2020-09-04 14:02:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-09-04 14:02:35,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:02:35,597 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] [2020-09-04 14:02:35,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 14:02:35,598 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:02:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:02:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1971007991, now seen corresponding path program 1 times [2020-09-04 14:02:35,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:02:35,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729390584] [2020-09-04 14:02:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:02:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:36,974 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:02:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:02:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:02:37,616 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 14:02:37,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729390584] [2020-09-04 14:02:37,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:02:37,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:02:37,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576593493] [2020-09-04 14:02:37,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:02:37,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:02:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:02:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:02:37,618 INFO L87 Difference]: Start difference. First operand 68369 states and 108871 transitions. Second operand 4 states. [2020-09-04 14:03:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:06,617 INFO L93 Difference]: Finished difference Result 200055 states and 318313 transitions. [2020-09-04 14:03:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 14:03:06,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-09-04 14:03:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:06,758 INFO L225 Difference]: With dead ends: 200055 [2020-09-04 14:03:06,758 INFO L226 Difference]: Without dead ends: 134536 [2020-09-04 14:03:06,810 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 14:03:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134536 states. [2020-09-04 14:03:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134536 to 134534. [2020-09-04 14:03:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134534 states. [2020-09-04 14:03:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134534 states to 134534 states and 213380 transitions. [2020-09-04 14:03:15,096 INFO L78 Accepts]: Start accepts. Automaton has 134534 states and 213380 transitions. Word has length 486 [2020-09-04 14:03:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:15,096 INFO L479 AbstractCegarLoop]: Abstraction has 134534 states and 213380 transitions. [2020-09-04 14:03:15,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:03:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 134534 states and 213380 transitions. [2020-09-04 14:03:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-09-04 14:03:15,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:15,202 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] [2020-09-04 14:03:15,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 14:03:15,203 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -917079770, now seen corresponding path program 1 times [2020-09-04 14:03:15,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:15,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745578654] [2020-09-04 14:03:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:16,998 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:03:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:17,604 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 14:03:17,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745578654] [2020-09-04 14:03:17,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:17,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:03:17,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162157432] [2020-09-04 14:03:17,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:03:17,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:03:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:03:17,608 INFO L87 Difference]: Start difference. First operand 134534 states and 213380 transitions. Second operand 5 states. [2020-09-04 14:03:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:03:44,413 INFO L93 Difference]: Finished difference Result 312717 states and 499578 transitions. [2020-09-04 14:03:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:03:44,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-09-04 14:03:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:03:44,592 INFO L225 Difference]: With dead ends: 312717 [2020-09-04 14:03:44,592 INFO L226 Difference]: Without dead ends: 159955 [2020-09-04 14:03:44,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 14:03:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159955 states. [2020-09-04 14:03:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159955 to 159953. [2020-09-04 14:03:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159953 states. [2020-09-04 14:03:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159953 states to 159953 states and 254900 transitions. [2020-09-04 14:03:56,164 INFO L78 Accepts]: Start accepts. Automaton has 159953 states and 254900 transitions. Word has length 486 [2020-09-04 14:03:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:03:56,164 INFO L479 AbstractCegarLoop]: Abstraction has 159953 states and 254900 transitions. [2020-09-04 14:03:56,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 14:03:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 159953 states and 254900 transitions. [2020-09-04 14:03:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:03:56,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:03:56,306 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] [2020-09-04 14:03:56,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 14:03:56,306 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:03:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:03:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-09-04 14:03:56,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:03:56,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915161256] [2020-09-04 14:03:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:03:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:57,774 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:03:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:03:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:03:58,534 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 14:03:58,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915161256] [2020-09-04 14:03:58,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:03:58,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 14:03:58,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070807497] [2020-09-04 14:03:58,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 14:03:58,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:03:58,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 14:03:58,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 14:03:58,536 INFO L87 Difference]: Start difference. First operand 159953 states and 254900 transitions. Second operand 4 states. [2020-09-04 14:03:59,574 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2020-09-04 14:04:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:04:26,882 INFO L93 Difference]: Finished difference Result 332173 states and 515718 transitions. [2020-09-04 14:04:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 14:04:26,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-09-04 14:04:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:04:27,141 INFO L225 Difference]: With dead ends: 332173 [2020-09-04 14:04:27,141 INFO L226 Difference]: Without dead ends: 243475 [2020-09-04 14:04:27,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:04:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243475 states. [2020-09-04 14:04:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243475 to 243473. [2020-09-04 14:04:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243473 states. [2020-09-04 14:04:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243473 states to 243473 states and 379388 transitions. [2020-09-04 14:04:45,663 INFO L78 Accepts]: Start accepts. Automaton has 243473 states and 379388 transitions. Word has length 488 [2020-09-04 14:04:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:04:45,663 INFO L479 AbstractCegarLoop]: Abstraction has 243473 states and 379388 transitions. [2020-09-04 14:04:45,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 14:04:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 243473 states and 379388 transitions. [2020-09-04 14:04:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:04:45,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:04:45,854 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] [2020-09-04 14:04:45,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 14:04:45,854 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:04:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:04:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1358520816, now seen corresponding path program 1 times [2020-09-04 14:04:45,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:04:45,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306475762] [2020-09-04 14:04:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:04:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:48,292 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:04:48,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:04:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:04:51,812 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 14:04:51,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306475762] [2020-09-04 14:04:51,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:04:51,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 14:04:51,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715323797] [2020-09-04 14:04:51,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 14:04:51,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:04:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 14:04:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-09-04 14:04:51,814 INFO L87 Difference]: Start difference. First operand 243473 states and 379388 transitions. Second operand 18 states. [2020-09-04 14:04:53,145 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 415 [2020-09-04 14:05:07,275 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-09-04 14:05:09,713 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-09-04 14:05:10,017 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-09-04 14:05:16,256 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-09-04 14:06:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:06:15,010 INFO L93 Difference]: Finished difference Result 679323 states and 1056705 transitions. [2020-09-04 14:06:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 14:06:15,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 488 [2020-09-04 14:06:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:06:15,733 INFO L225 Difference]: With dead ends: 679323 [2020-09-04 14:06:15,733 INFO L226 Difference]: Without dead ends: 649497 [2020-09-04 14:06:15,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=732, Invalid=1920, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 14:06:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649497 states. [2020-09-04 14:06:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649497 to 326929. [2020-09-04 14:06:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326929 states. [2020-09-04 14:06:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326929 states to 326929 states and 509404 transitions. [2020-09-04 14:06:45,802 INFO L78 Accepts]: Start accepts. Automaton has 326929 states and 509404 transitions. Word has length 488 [2020-09-04 14:06:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:06:45,803 INFO L479 AbstractCegarLoop]: Abstraction has 326929 states and 509404 transitions. [2020-09-04 14:06:45,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 14:06:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 326929 states and 509404 transitions. [2020-09-04 14:06:46,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:06:46,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:06:46,030 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] [2020-09-04 14:06:46,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 14:06:46,031 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:06:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:06:46,031 INFO L82 PathProgramCache]: Analyzing trace with hash -763957802, now seen corresponding path program 1 times [2020-09-04 14:06:46,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:06:46,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296699144] [2020-09-04 14:06:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:06:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:48,471 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:06:48,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:06:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:06:49,414 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 14:06:49,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296699144] [2020-09-04 14:06:49,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:06:49,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 14:06:49,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586031323] [2020-09-04 14:06:49,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 14:06:49,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:06:49,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 14:06:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-09-04 14:06:49,417 INFO L87 Difference]: Start difference. First operand 326929 states and 509404 transitions. Second operand 14 states. [2020-09-04 14:06:50,887 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 418 [2020-09-04 14:07:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:07:49,953 INFO L93 Difference]: Finished difference Result 432433 states and 671584 transitions. [2020-09-04 14:07:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 14:07:49,955 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-09-04 14:07:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:07:50,337 INFO L225 Difference]: With dead ends: 432433 [2020-09-04 14:07:50,337 INFO L226 Difference]: Without dead ends: 361487 [2020-09-04 14:07:50,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 14:07:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361487 states. [2020-09-04 14:08:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361487 to 255985. [2020-09-04 14:08:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255985 states. [2020-09-04 14:08:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255985 states to 255985 states and 397388 transitions. [2020-09-04 14:08:17,653 INFO L78 Accepts]: Start accepts. Automaton has 255985 states and 397388 transitions. Word has length 488 [2020-09-04 14:08:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:08:17,653 INFO L479 AbstractCegarLoop]: Abstraction has 255985 states and 397388 transitions. [2020-09-04 14:08:17,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 14:08:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 255985 states and 397388 transitions. [2020-09-04 14:08:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:08:17,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:08:17,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:08:17,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 14:08:17,857 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:08:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:08:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-09-04 14:08:17,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:08:17,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361292155] [2020-09-04 14:08:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:08:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:20,271 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:08:20,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:08:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:08:20,621 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 14:08:20,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361292155] [2020-09-04 14:08:20,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:08:20,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 14:08:20,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925277845] [2020-09-04 14:08:20,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 14:08:20,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:08:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 14:08:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-04 14:08:20,624 INFO L87 Difference]: Start difference. First operand 255985 states and 397388 transitions. Second operand 14 states. [2020-09-04 14:08:22,411 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 418 [2020-09-04 14:09:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 14:09:12,300 INFO L93 Difference]: Finished difference Result 375009 states and 584160 transitions. [2020-09-04 14:09:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 14:09:12,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-09-04 14:09:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 14:09:12,652 INFO L225 Difference]: With dead ends: 375009 [2020-09-04 14:09:12,652 INFO L226 Difference]: Without dead ends: 346767 [2020-09-04 14:09:12,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 14:09:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346767 states. [2020-09-04 14:09:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346767 to 266561. [2020-09-04 14:09:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266561 states. [2020-09-04 14:09:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266561 states to 266561 states and 412444 transitions. [2020-09-04 14:09:39,486 INFO L78 Accepts]: Start accepts. Automaton has 266561 states and 412444 transitions. Word has length 488 [2020-09-04 14:09:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 14:09:39,487 INFO L479 AbstractCegarLoop]: Abstraction has 266561 states and 412444 transitions. [2020-09-04 14:09:39,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 14:09:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 266561 states and 412444 transitions. [2020-09-04 14:09:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-09-04 14:09:39,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 14:09:39,696 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] [2020-09-04 14:09:39,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 14:09:39,697 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 14:09:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 14:09:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-09-04 14:09:39,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 14:09:39,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342041253] [2020-09-04 14:09:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 14:09:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:42,285 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 382 [2020-09-04 14:09:42,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 14:09:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 14:09:42,527 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 14:09:42,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342041253] [2020-09-04 14:09:42,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 14:09:42,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 14:09:42,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860518631] [2020-09-04 14:09:42,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 14:09:42,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 14:09:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 14:09:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 14:09:42,530 INFO L87 Difference]: Start difference. First operand 266561 states and 412444 transitions. Second operand 5 states.