/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:02:23,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:02:23,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:02:23,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:02:23,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:02:23,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:02:23,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:02:23,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:02:23,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:02:23,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:02:23,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:02:23,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:02:23,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:02:23,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:02:23,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:02:23,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:02:23,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:02:23,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:02:23,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:02:23,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:02:23,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:02:23,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:02:23,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:02:23,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:02:23,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 23:02:23,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 23:02:23,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 23:02:23,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 23:02:23,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 23:02:23,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 23:02:23,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 23:02:23,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 23:02:23,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 23:02:23,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 23:02:23,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 23:02:23,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 23:02:23,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 23:02:23,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 23:02:23,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:02:23,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:02:23,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:02:23,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:02:24,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:02:24,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:02:24,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:02:24,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:02:24,027 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:02:24,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:02:24,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:02:24,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:02:24,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:02:24,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:02:24,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:02:24,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:02:24,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:02:24,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:02:24,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:02:24,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:02:24,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:02:24,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:02:24,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:02:24,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:02:24,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:02:24,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:02:24,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:02:24,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:02:24,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:02:24,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:02:24,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:02:24,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:02:24,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:02:24,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:02:24,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:02:24,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:02:24,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:02:24,415 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:02:24,416 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:02:24,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:02:24,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90de4a6da/9def497bdcf9419ca46d8facf6747fec/FLAGaf066aa3a [2020-11-06 23:02:25,411 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:02:25,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:02:25,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90de4a6da/9def497bdcf9419ca46d8facf6747fec/FLAGaf066aa3a [2020-11-06 23:02:25,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90de4a6da/9def497bdcf9419ca46d8facf6747fec [2020-11-06 23:02:25,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:02:25,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:02:25,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:02:25,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:02:25,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:02:25,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:25" (1/1) ... [2020-11-06 23:02:25,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3898f96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:25, skipping insertion in model container [2020-11-06 23:02:25,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:25" (1/1) ... [2020-11-06 23:02:25,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:02:25,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:02:26,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:02:26,558 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:02:26,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:02:27,022 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:02:27,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27 WrapperNode [2020-11-06 23:02:27,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:02:27,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:02:27,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:02:27,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:02:27,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... [2020-11-06 23:02:27,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:02:27,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:02:27,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:02:27,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:02:27,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:02:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:02:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:02:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:02:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:02:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:02:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:02:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:02:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:02:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:02:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:02:27,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:02:27,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:02:27,307 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:02:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:02:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:02:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:02:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:02:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:02:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:02:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:02:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:02:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:02:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:02:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:02:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:02:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:02:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:02:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:02:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:02:29,743 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:02:29,744 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:02:29,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:29 BoogieIcfgContainer [2020-11-06 23:02:29,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:02:29,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:02:29,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:02:29,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:02:29,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:25" (1/3) ... [2020-11-06 23:02:29,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe98418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:29, skipping insertion in model container [2020-11-06 23:02:29,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:27" (2/3) ... [2020-11-06 23:02:29,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe98418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:29, skipping insertion in model container [2020-11-06 23:02:29,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:29" (3/3) ... [2020-11-06 23:02:29,755 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:02:29,770 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:02:29,775 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:02:29,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:02:29,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:02:29,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:02:29,819 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:02:29,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:02:29,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:02:29,819 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:02:29,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:02:29,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:02:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states. [2020-11-06 23:02:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:02:29,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:29,906 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] [2020-11-06 23:02:29,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:29,914 INFO L82 PathProgramCache]: Analyzing trace with hash 471360347, now seen corresponding path program 1 times [2020-11-06 23:02:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:29,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480836141] [2020-11-06 23:02:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:31,557 WARN L194 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:31,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:31,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480836141] [2020-11-06 23:02:31,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:31,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:31,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974715291] [2020-11-06 23:02:31,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:31,853 INFO L87 Difference]: Start difference. First operand 812 states. Second operand 4 states. [2020-11-06 23:02:32,799 WARN L194 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:38,877 INFO L93 Difference]: Finished difference Result 1533 states and 2691 transitions. [2020-11-06 23:02:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:38,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-11-06 23:02:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:38,931 INFO L225 Difference]: With dead ends: 1533 [2020-11-06 23:02:38,935 INFO L226 Difference]: Without dead ends: 1313 [2020-11-06 23:02:38,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-11-06 23:02:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1310. [2020-11-06 23:02:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-11-06 23:02:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2041 transitions. [2020-11-06 23:02:39,104 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2041 transitions. Word has length 331 [2020-11-06 23:02:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:39,109 INFO L481 AbstractCegarLoop]: Abstraction has 1310 states and 2041 transitions. [2020-11-06 23:02:39,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2041 transitions. [2020-11-06 23:02:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:02:39,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:39,125 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] [2020-11-06 23:02:39,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:02:39,126 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:39,127 INFO L82 PathProgramCache]: Analyzing trace with hash -834488451, now seen corresponding path program 1 times [2020-11-06 23:02:39,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:39,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584919787] [2020-11-06 23:02:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:40,329 WARN L194 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:40,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584919787] [2020-11-06 23:02:40,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:40,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:40,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777548631] [2020-11-06 23:02:40,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:40,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:40,540 INFO L87 Difference]: Start difference. First operand 1310 states and 2041 transitions. Second operand 4 states. [2020-11-06 23:02:41,271 WARN L194 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:46,260 INFO L93 Difference]: Finished difference Result 2686 states and 4216 transitions. [2020-11-06 23:02:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:46,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-11-06 23:02:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:46,281 INFO L225 Difference]: With dead ends: 2686 [2020-11-06 23:02:46,281 INFO L226 Difference]: Without dead ends: 2303 [2020-11-06 23:02:46,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-11-06 23:02:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2300. [2020-11-06 23:02:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-11-06 23:02:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3577 transitions. [2020-11-06 23:02:46,406 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3577 transitions. Word has length 331 [2020-11-06 23:02:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:46,407 INFO L481 AbstractCegarLoop]: Abstraction has 2300 states and 3577 transitions. [2020-11-06 23:02:46,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3577 transitions. [2020-11-06 23:02:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:02:46,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:46,421 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] [2020-11-06 23:02:46,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:02:46,422 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash -159708538, now seen corresponding path program 1 times [2020-11-06 23:02:46,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:46,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104479123] [2020-11-06 23:02:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:47,368 WARN L194 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:47,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:47,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104479123] [2020-11-06 23:02:47,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:47,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:47,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233436402] [2020-11-06 23:02:47,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:47,527 INFO L87 Difference]: Start difference. First operand 2300 states and 3577 transitions. Second operand 4 states. [2020-11-06 23:02:48,249 WARN L194 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:52,994 INFO L93 Difference]: Finished difference Result 4870 states and 7637 transitions. [2020-11-06 23:02:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:52,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-11-06 23:02:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:53,018 INFO L225 Difference]: With dead ends: 4870 [2020-11-06 23:02:53,018 INFO L226 Difference]: Without dead ends: 4203 [2020-11-06 23:02:53,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2020-11-06 23:02:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4200. [2020-11-06 23:02:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-11-06 23:02:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6517 transitions. [2020-11-06 23:02:53,175 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6517 transitions. Word has length 331 [2020-11-06 23:02:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:53,175 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 6517 transitions. [2020-11-06 23:02:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6517 transitions. [2020-11-06 23:02:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:02:53,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:53,187 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] [2020-11-06 23:02:53,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:02:53,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1289694683, now seen corresponding path program 1 times [2020-11-06 23:02:53,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:53,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898360221] [2020-11-06 23:02:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:54,448 WARN L194 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:54,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898360221] [2020-11-06 23:02:54,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:54,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:02:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7682023] [2020-11-06 23:02:54,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:02:54,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:02:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:54,627 INFO L87 Difference]: Start difference. First operand 4200 states and 6517 transitions. Second operand 5 states. [2020-11-06 23:03:01,325 WARN L194 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:03,377 INFO L93 Difference]: Finished difference Result 12417 states and 19248 transitions. [2020-11-06 23:03:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:03,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:03:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:03,418 INFO L225 Difference]: With dead ends: 12417 [2020-11-06 23:03:03,418 INFO L226 Difference]: Without dead ends: 8232 [2020-11-06 23:03:03,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2020-11-06 23:03:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8229. [2020-11-06 23:03:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-11-06 23:03:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12695 transitions. [2020-11-06 23:03:03,771 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12695 transitions. Word has length 331 [2020-11-06 23:03:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:03,771 INFO L481 AbstractCegarLoop]: Abstraction has 8229 states and 12695 transitions. [2020-11-06 23:03:03,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12695 transitions. [2020-11-06 23:03:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:03:03,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:03,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:03,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:03:03,788 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1375168706, now seen corresponding path program 1 times [2020-11-06 23:03:03,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:03,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56373580] [2020-11-06 23:03:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:04,579 WARN L194 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:04,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:04,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56373580] [2020-11-06 23:03:04,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:04,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:04,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798269992] [2020-11-06 23:03:04,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:04,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:04,790 INFO L87 Difference]: Start difference. First operand 8229 states and 12695 transitions. Second operand 4 states. [2020-11-06 23:03:12,740 WARN L194 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:03:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:14,632 INFO L93 Difference]: Finished difference Result 24236 states and 37321 transitions. [2020-11-06 23:03:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:14,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-11-06 23:03:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:14,698 INFO L225 Difference]: With dead ends: 24236 [2020-11-06 23:03:14,698 INFO L226 Difference]: Without dead ends: 16136 [2020-11-06 23:03:14,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16136 states. [2020-11-06 23:03:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16136 to 16133. [2020-11-06 23:03:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16133 states. [2020-11-06 23:03:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 24742 transitions. [2020-11-06 23:03:15,343 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 24742 transitions. Word has length 333 [2020-11-06 23:03:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:15,344 INFO L481 AbstractCegarLoop]: Abstraction has 16133 states and 24742 transitions. [2020-11-06 23:03:15,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 24742 transitions. [2020-11-06 23:03:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:03:15,375 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:15,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:15,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:03:15,381 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash -129823331, now seen corresponding path program 1 times [2020-11-06 23:03:15,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:15,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544700728] [2020-11-06 23:03:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:16,158 WARN L194 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:16,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:16,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544700728] [2020-11-06 23:03:16,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:16,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:16,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147629185] [2020-11-06 23:03:16,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:16,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:16,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:16,272 INFO L87 Difference]: Start difference. First operand 16133 states and 24742 transitions. Second operand 4 states. [2020-11-06 23:03:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:26,110 INFO L93 Difference]: Finished difference Result 48322 states and 74101 transitions. [2020-11-06 23:03:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:26,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-11-06 23:03:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:26,184 INFO L225 Difference]: With dead ends: 48322 [2020-11-06 23:03:26,184 INFO L226 Difference]: Without dead ends: 32231 [2020-11-06 23:03:26,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-11-06 23:03:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16152. [2020-11-06 23:03:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16152 states. [2020-11-06 23:03:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16152 states to 16152 states and 24770 transitions. [2020-11-06 23:03:27,017 INFO L78 Accepts]: Start accepts. Automaton has 16152 states and 24770 transitions. Word has length 333 [2020-11-06 23:03:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:27,017 INFO L481 AbstractCegarLoop]: Abstraction has 16152 states and 24770 transitions. [2020-11-06 23:03:27,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16152 states and 24770 transitions. [2020-11-06 23:03:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-11-06 23:03:27,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:27,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:27,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:03:27,048 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash -120615702, now seen corresponding path program 1 times [2020-11-06 23:03:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:27,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798150835] [2020-11-06 23:03:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:27,894 WARN L194 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:27,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:27,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798150835] [2020-11-06 23:03:27,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:27,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:27,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219141506] [2020-11-06 23:03:27,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:27,997 INFO L87 Difference]: Start difference. First operand 16152 states and 24770 transitions. Second operand 4 states. [2020-11-06 23:03:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:38,247 INFO L93 Difference]: Finished difference Result 48341 states and 74122 transitions. [2020-11-06 23:03:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:38,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-11-06 23:03:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:38,307 INFO L225 Difference]: With dead ends: 48341 [2020-11-06 23:03:38,308 INFO L226 Difference]: Without dead ends: 32249 [2020-11-06 23:03:38,337 INFO L677 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 [2020-11-06 23:03:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-11-06 23:03:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16170. [2020-11-06 23:03:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16170 states. [2020-11-06 23:03:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16170 states to 16170 states and 24791 transitions. [2020-11-06 23:03:39,042 INFO L78 Accepts]: Start accepts. Automaton has 16170 states and 24791 transitions. Word has length 334 [2020-11-06 23:03:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:39,042 INFO L481 AbstractCegarLoop]: Abstraction has 16170 states and 24791 transitions. [2020-11-06 23:03:39,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 16170 states and 24791 transitions. [2020-11-06 23:03:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-11-06 23:03:39,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:39,068 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] [2020-11-06 23:03:39,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:39,069 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2113029625, now seen corresponding path program 1 times [2020-11-06 23:03:39,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:39,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588600508] [2020-11-06 23:03:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:39,904 WARN L194 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:39,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:40,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588600508] [2020-11-06 23:03:40,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:40,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:40,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180835695] [2020-11-06 23:03:40,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:40,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:40,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:40,156 INFO L87 Difference]: Start difference. First operand 16170 states and 24791 transitions. Second operand 4 states. [2020-11-06 23:03:48,550 WARN L194 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:03:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:50,693 INFO L93 Difference]: Finished difference Result 45821 states and 70102 transitions. [2020-11-06 23:03:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:50,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-11-06 23:03:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:50,751 INFO L225 Difference]: With dead ends: 45821 [2020-11-06 23:03:50,751 INFO L226 Difference]: Without dead ends: 29896 [2020-11-06 23:03:50,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-11-06 23:03:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 29893. [2020-11-06 23:03:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29893 states. [2020-11-06 23:03:52,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29893 states to 29893 states and 45507 transitions. [2020-11-06 23:03:52,268 INFO L78 Accepts]: Start accepts. Automaton has 29893 states and 45507 transitions. Word has length 335 [2020-11-06 23:03:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:52,269 INFO L481 AbstractCegarLoop]: Abstraction has 29893 states and 45507 transitions. [2020-11-06 23:03:52,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29893 states and 45507 transitions. [2020-11-06 23:03:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-11-06 23:03:52,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:52,319 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] [2020-11-06 23:03:52,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:52,319 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1554778250, now seen corresponding path program 1 times [2020-11-06 23:03:52,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:52,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298531747] [2020-11-06 23:03:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:53,484 WARN L194 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:53,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298531747] [2020-11-06 23:03:53,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:53,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:53,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125448895] [2020-11-06 23:03:53,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:53,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:53,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:53,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:53,652 INFO L87 Difference]: Start difference. First operand 29893 states and 45507 transitions. Second operand 5 states. [2020-11-06 23:04:01,751 WARN L194 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:04,516 INFO L93 Difference]: Finished difference Result 88199 states and 134054 transitions. [2020-11-06 23:04:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:04,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-11-06 23:04:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:04,600 INFO L225 Difference]: With dead ends: 88199 [2020-11-06 23:04:04,600 INFO L226 Difference]: Without dead ends: 58365 [2020-11-06 23:04:04,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58365 states. [2020-11-06 23:04:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58365 to 58362. [2020-11-06 23:04:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58362 states. [2020-11-06 23:04:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58362 states to 58362 states and 88200 transitions. [2020-11-06 23:04:07,414 INFO L78 Accepts]: Start accepts. Automaton has 58362 states and 88200 transitions. Word has length 335 [2020-11-06 23:04:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:07,417 INFO L481 AbstractCegarLoop]: Abstraction has 58362 states and 88200 transitions. [2020-11-06 23:04:07,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 58362 states and 88200 transitions. [2020-11-06 23:04:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-06 23:04:07,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:07,460 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] [2020-11-06 23:04:07,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:07,460 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -761637660, now seen corresponding path program 1 times [2020-11-06 23:04:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:07,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442808720] [2020-11-06 23:04:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:08,561 WARN L194 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:04:08,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:08,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442808720] [2020-11-06 23:04:08,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:08,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:08,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878256312] [2020-11-06 23:04:08,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:08,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:08,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:08,846 INFO L87 Difference]: Start difference. First operand 58362 states and 88200 transitions. Second operand 5 states. [2020-11-06 23:04:18,356 WARN L194 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:22,082 INFO L93 Difference]: Finished difference Result 172283 states and 259893 transitions. [2020-11-06 23:04:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:22,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-11-06 23:04:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:22,271 INFO L225 Difference]: With dead ends: 172283 [2020-11-06 23:04:22,271 INFO L226 Difference]: Without dead ends: 114042 [2020-11-06 23:04:22,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114042 states. [2020-11-06 23:04:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114042 to 114039. [2020-11-06 23:04:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114039 states. [2020-11-06 23:04:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114039 states to 114039 states and 171025 transitions. [2020-11-06 23:04:28,241 INFO L78 Accepts]: Start accepts. Automaton has 114039 states and 171025 transitions. Word has length 337 [2020-11-06 23:04:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:28,242 INFO L481 AbstractCegarLoop]: Abstraction has 114039 states and 171025 transitions. [2020-11-06 23:04:28,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 114039 states and 171025 transitions. [2020-11-06 23:04:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-06 23:04:28,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:28,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:28,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:28,344 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1376013622, now seen corresponding path program 1 times [2020-11-06 23:04:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:28,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202635808] [2020-11-06 23:04:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:29,712 WARN L194 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:04:29,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:29,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202635808] [2020-11-06 23:04:29,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:29,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012205294] [2020-11-06 23:04:29,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:29,906 INFO L87 Difference]: Start difference. First operand 114039 states and 171025 transitions. Second operand 5 states. [2020-11-06 23:04:43,220 WARN L194 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:48,759 INFO L93 Difference]: Finished difference Result 337035 states and 504608 transitions. [2020-11-06 23:04:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:48,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-11-06 23:04:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:49,225 INFO L225 Difference]: With dead ends: 337035 [2020-11-06 23:04:49,225 INFO L226 Difference]: Without dead ends: 223230 [2020-11-06 23:04:49,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223230 states. [2020-11-06 23:05:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223230 to 223227. [2020-11-06 23:05:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223227 states. [2020-11-06 23:05:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223227 states to 223227 states and 332317 transitions. [2020-11-06 23:05:01,541 INFO L78 Accepts]: Start accepts. Automaton has 223227 states and 332317 transitions. Word has length 337 [2020-11-06 23:05:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:01,541 INFO L481 AbstractCegarLoop]: Abstraction has 223227 states and 332317 transitions. [2020-11-06 23:05:01,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 223227 states and 332317 transitions. [2020-11-06 23:05:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-11-06 23:05:02,099 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:02,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:02,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:02,100 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:02,101 INFO L82 PathProgramCache]: Analyzing trace with hash 912889276, now seen corresponding path program 1 times [2020-11-06 23:05:02,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:02,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426609519] [2020-11-06 23:05:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:03,102 WARN L194 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:05:03,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:03,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426609519] [2020-11-06 23:05:03,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:03,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:03,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462532332] [2020-11-06 23:05:03,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:03,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:03,508 INFO L87 Difference]: Start difference. First operand 223227 states and 332317 transitions. Second operand 4 states. [2020-11-06 23:05:24,740 WARN L194 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:05:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:33,704 INFO L93 Difference]: Finished difference Result 658961 states and 979031 transitions. [2020-11-06 23:05:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:33,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-11-06 23:05:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:34,585 INFO L225 Difference]: With dead ends: 658961 [2020-11-06 23:05:34,586 INFO L226 Difference]: Without dead ends: 437118 [2020-11-06 23:05:34,769 INFO L677 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 [2020-11-06 23:05:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437118 states. [2020-11-06 23:05:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437118 to 437115. [2020-11-06 23:05:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437115 states. [2020-11-06 23:05:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437115 states to 437115 states and 645851 transitions. [2020-11-06 23:05:58,172 INFO L78 Accepts]: Start accepts. Automaton has 437115 states and 645851 transitions. Word has length 339 [2020-11-06 23:05:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:58,173 INFO L481 AbstractCegarLoop]: Abstraction has 437115 states and 645851 transitions. [2020-11-06 23:05:58,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 437115 states and 645851 transitions. [2020-11-06 23:05:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-11-06 23:05:59,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:59,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:59,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:05:59,118 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1411168983, now seen corresponding path program 1 times [2020-11-06 23:05:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:59,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440069691] [2020-11-06 23:05:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:00,285 WARN L194 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:06:00,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:00,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440069691] [2020-11-06 23:06:00,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:00,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:00,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493875250] [2020-11-06 23:06:00,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:00,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:00,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:00,409 INFO L87 Difference]: Start difference. First operand 437115 states and 645851 transitions. Second operand 4 states.