/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 18:03:02,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 18:03:02,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 18:03:02,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 18:03:02,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 18:03:02,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 18:03:02,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 18:03:02,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 18:03:02,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 18:03:02,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 18:03:02,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 18:03:02,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 18:03:02,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 18:03:02,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 18:03:02,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 18:03:02,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 18:03:02,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 18:03:02,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 18:03:02,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 18:03:02,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 18:03:02,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 18:03:02,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 18:03:02,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 18:03:02,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 18:03:02,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 18:03:02,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 18:03:02,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 18:03:02,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 18:03:02,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 18:03:02,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 18:03:02,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 18:03:02,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 18:03:02,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 18:03:02,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 18:03:02,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 18:03:02,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 18:03:02,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 18:03:02,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 18:03:02,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 18:03:02,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 18:03:02,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 18:03:02,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 18:03:02,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 18:03:02,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 18:03:02,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 18:03:02,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 18:03:02,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 18:03:02,735 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 18:03:02,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 18:03:02,736 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 18:03:02,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 18:03:02,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 18:03:02,736 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 18:03:02,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 18:03:02,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 18:03:02,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 18:03:02,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 18:03:02,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 18:03:02,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 18:03:02,739 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 18:03:03,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 18:03:03,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 18:03:03,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 18:03:03,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 18:03:03,211 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 18:03:03,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 18:03:03,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af837219f/e04a71ac42f8490dab20fb98001d945f/FLAG9362dbdc0 [2020-09-04 18:03:03,986 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 18:03:03,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 18:03:04,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af837219f/e04a71ac42f8490dab20fb98001d945f/FLAG9362dbdc0 [2020-09-04 18:03:04,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af837219f/e04a71ac42f8490dab20fb98001d945f [2020-09-04 18:03:04,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 18:03:04,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 18:03:04,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 18:03:04,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 18:03:04,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 18:03:04,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 06:03:04" (1/1) ... [2020-09-04 18:03:04,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d56520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:04, skipping insertion in model container [2020-09-04 18:03:04,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 06:03:04" (1/1) ... [2020-09-04 18:03:04,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 18:03:04,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 18:03:05,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 18:03:05,028 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 18:03:05,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 18:03:05,220 INFO L208 MainTranslator]: Completed translation [2020-09-04 18:03:05,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05 WrapperNode [2020-09-04 18:03:05,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 18:03:05,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 18:03:05,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 18:03:05,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 18:03:05,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... [2020-09-04 18:03:05,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 18:03:05,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 18:03:05,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 18:03:05,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 18:03:05,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 18:03:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 18:03:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 18:03:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 18:03:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 18:03:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 18:03:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 18:03:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-04 18:03:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 18:03:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-04 18:03:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 18:03:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 18:03:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-04 18:03:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-04 18:03:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-04 18:03:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-04 18:03:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-04 18:03:05,448 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 18:03:05,448 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 18:03:05,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 18:03:05,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 18:03:05,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 18:03:07,372 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 18:03:07,374 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 18:03:07,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 06:03:07 BoogieIcfgContainer [2020-09-04 18:03:07,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 18:03:07,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 18:03:07,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 18:03:07,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 18:03:07,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 06:03:04" (1/3) ... [2020-09-04 18:03:07,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1560c4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 06:03:07, skipping insertion in model container [2020-09-04 18:03:07,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 06:03:05" (2/3) ... [2020-09-04 18:03:07,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1560c4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 06:03:07, skipping insertion in model container [2020-09-04 18:03:07,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 06:03:07" (3/3) ... [2020-09-04 18:03:07,398 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-04 18:03:07,411 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 18:03:07,438 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 18:03:07,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 18:03:07,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 18:03:07,491 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 18:03:07,491 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 18:03:07,491 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 18:03:07,491 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 18:03:07,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 18:03:07,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 18:03:07,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 18:03:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-04 18:03:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-04 18:03:07,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:07,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:07,574 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-04 18:03:07,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:07,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552247457] [2020-09-04 18:03:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:07,679 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:08,983 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:08,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:09,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552247457] [2020-09-04 18:03:09,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:09,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 18:03:09,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391228442] [2020-09-04 18:03:09,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 18:03:09,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:09,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 18:03:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:09,477 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-04 18:03:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:13,204 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-04 18:03:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 18:03:13,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-04 18:03:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:13,246 INFO L225 Difference]: With dead ends: 1657 [2020-09-04 18:03:13,247 INFO L226 Difference]: Without dead ends: 1241 [2020-09-04 18:03:13,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-04 18:03:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-04 18:03:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-04 18:03:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-04 18:03:13,410 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-04 18:03:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:13,412 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-04 18:03:13,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 18:03:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-04 18:03:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-04 18:03:13,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:13,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:13,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 18:03:13,425 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-04 18:03:13,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:13,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251536359] [2020-09-04 18:03:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:13,431 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:13,966 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:14,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251536359] [2020-09-04 18:03:14,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:14,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 18:03:14,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779482988] [2020-09-04 18:03:14,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 18:03:14,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:14,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 18:03:14,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:14,333 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-04 18:03:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:17,297 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-04 18:03:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 18:03:17,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-04 18:03:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:17,312 INFO L225 Difference]: With dead ends: 2498 [2020-09-04 18:03:17,312 INFO L226 Difference]: Without dead ends: 2052 [2020-09-04 18:03:17,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-04 18:03:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-04 18:03:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-04 18:03:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-04 18:03:17,453 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-04 18:03:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:17,455 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-04 18:03:17,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 18:03:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-04 18:03:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-04 18:03:17,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:17,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:17,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 18:03:17,469 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-04 18:03:17,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:17,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022621334] [2020-09-04 18:03:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:17,476 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:18,176 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:18,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:18,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022621334] [2020-09-04 18:03:18,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:18,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 18:03:18,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045266696] [2020-09-04 18:03:18,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 18:03:18,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:18,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 18:03:18,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 18:03:18,563 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-04 18:03:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:23,116 INFO L93 Difference]: Finished difference Result 5648 states and 7106 transitions. [2020-09-04 18:03:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 18:03:23,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-04 18:03:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:23,136 INFO L225 Difference]: With dead ends: 5648 [2020-09-04 18:03:23,136 INFO L226 Difference]: Without dead ends: 3788 [2020-09-04 18:03:23,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 18:03:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2020-09-04 18:03:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3786. [2020-09-04 18:03:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3786 states. [2020-09-04 18:03:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 4727 transitions. [2020-09-04 18:03:23,372 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 4727 transitions. Word has length 449 [2020-09-04 18:03:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:23,373 INFO L479 AbstractCegarLoop]: Abstraction has 3786 states and 4727 transitions. [2020-09-04 18:03:23,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 18:03:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 4727 transitions. [2020-09-04 18:03:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-04 18:03:23,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:23,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:23,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 18:03:23,385 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1103174892, now seen corresponding path program 1 times [2020-09-04 18:03:23,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:23,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058060569] [2020-09-04 18:03:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:23,390 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:23,829 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:23,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:23,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058060569] [2020-09-04 18:03:23,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:23,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 18:03:23,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175867472] [2020-09-04 18:03:23,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 18:03:23,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:23,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 18:03:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:24,000 INFO L87 Difference]: Start difference. First operand 3786 states and 4727 transitions. Second operand 4 states. [2020-09-04 18:03:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:27,705 INFO L93 Difference]: Finished difference Result 10961 states and 13760 transitions. [2020-09-04 18:03:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 18:03:27,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-09-04 18:03:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:27,740 INFO L225 Difference]: With dead ends: 10961 [2020-09-04 18:03:27,741 INFO L226 Difference]: Without dead ends: 7389 [2020-09-04 18:03:27,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2020-09-04 18:03:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 3788. [2020-09-04 18:03:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3788 states. [2020-09-04 18:03:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 4729 transitions. [2020-09-04 18:03:28,143 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 4729 transitions. Word has length 450 [2020-09-04 18:03:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:28,143 INFO L479 AbstractCegarLoop]: Abstraction has 3788 states and 4729 transitions. [2020-09-04 18:03:28,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 18:03:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 4729 transitions. [2020-09-04 18:03:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-04 18:03:28,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:28,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:28,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 18:03:28,154 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1245225403, now seen corresponding path program 1 times [2020-09-04 18:03:28,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:28,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830684063] [2020-09-04 18:03:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:28,160 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:28,677 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:28,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830684063] [2020-09-04 18:03:28,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:28,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 18:03:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329760382] [2020-09-04 18:03:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 18:03:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 18:03:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 18:03:28,866 INFO L87 Difference]: Start difference. First operand 3788 states and 4729 transitions. Second operand 5 states. [2020-09-04 18:03:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:33,805 INFO L93 Difference]: Finished difference Result 10724 states and 13437 transitions. [2020-09-04 18:03:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 18:03:33,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 451 [2020-09-04 18:03:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:33,834 INFO L225 Difference]: With dead ends: 10724 [2020-09-04 18:03:33,834 INFO L226 Difference]: Without dead ends: 7153 [2020-09-04 18:03:33,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 18:03:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2020-09-04 18:03:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 7151. [2020-09-04 18:03:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7151 states. [2020-09-04 18:03:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 8903 transitions. [2020-09-04 18:03:34,393 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 8903 transitions. Word has length 451 [2020-09-04 18:03:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:34,394 INFO L479 AbstractCegarLoop]: Abstraction has 7151 states and 8903 transitions. [2020-09-04 18:03:34,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 18:03:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 8903 transitions. [2020-09-04 18:03:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-09-04 18:03:34,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:34,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:34,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 18:03:34,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash 426038018, now seen corresponding path program 1 times [2020-09-04 18:03:34,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:34,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078670191] [2020-09-04 18:03:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:34,413 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:34,780 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:34,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:34,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078670191] [2020-09-04 18:03:34,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:34,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 18:03:34,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053634510] [2020-09-04 18:03:34,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 18:03:34,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:34,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 18:03:34,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:34,993 INFO L87 Difference]: Start difference. First operand 7151 states and 8903 transitions. Second operand 4 states. [2020-09-04 18:03:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:38,986 INFO L93 Difference]: Finished difference Result 20993 states and 26205 transitions. [2020-09-04 18:03:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 18:03:38,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 452 [2020-09-04 18:03:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:39,033 INFO L225 Difference]: With dead ends: 20993 [2020-09-04 18:03:39,033 INFO L226 Difference]: Without dead ends: 14079 [2020-09-04 18:03:39,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14079 states. [2020-09-04 18:03:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14079 to 7155. [2020-09-04 18:03:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7155 states. [2020-09-04 18:03:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 8907 transitions. [2020-09-04 18:03:39,781 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 8907 transitions. Word has length 452 [2020-09-04 18:03:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:39,782 INFO L479 AbstractCegarLoop]: Abstraction has 7155 states and 8907 transitions. [2020-09-04 18:03:39,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 18:03:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 8907 transitions. [2020-09-04 18:03:39,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-04 18:03:39,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:39,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:39,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 18:03:39,796 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1804062791, now seen corresponding path program 1 times [2020-09-04 18:03:39,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:39,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487754861] [2020-09-04 18:03:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:39,800 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:40,296 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:40,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:40,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487754861] [2020-09-04 18:03:40,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:40,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 18:03:40,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285516009] [2020-09-04 18:03:40,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 18:03:40,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 18:03:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 18:03:40,492 INFO L87 Difference]: Start difference. First operand 7155 states and 8907 transitions. Second operand 5 states. [2020-09-04 18:03:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:45,871 INFO L93 Difference]: Finished difference Result 19130 states and 23824 transitions. [2020-09-04 18:03:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 18:03:45,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 453 [2020-09-04 18:03:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:45,890 INFO L225 Difference]: With dead ends: 19130 [2020-09-04 18:03:45,890 INFO L226 Difference]: Without dead ends: 12218 [2020-09-04 18:03:45,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 18:03:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12218 states. [2020-09-04 18:03:47,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12218 to 12216. [2020-09-04 18:03:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12216 states. [2020-09-04 18:03:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 15102 transitions. [2020-09-04 18:03:47,341 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 15102 transitions. Word has length 453 [2020-09-04 18:03:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:47,342 INFO L479 AbstractCegarLoop]: Abstraction has 12216 states and 15102 transitions. [2020-09-04 18:03:47,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 18:03:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 15102 transitions. [2020-09-04 18:03:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-09-04 18:03:47,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:47,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:47,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 18:03:47,359 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1568550000, now seen corresponding path program 1 times [2020-09-04 18:03:47,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:47,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712645376] [2020-09-04 18:03:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:47,363 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:47,716 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-04 18:03:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:47,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712645376] [2020-09-04 18:03:47,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:47,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 18:03:47,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497857988] [2020-09-04 18:03:47,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 18:03:47,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:47,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 18:03:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:47,861 INFO L87 Difference]: Start difference. First operand 12216 states and 15102 transitions. Second operand 4 states. [2020-09-04 18:03:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:52,992 INFO L93 Difference]: Finished difference Result 35678 states and 44190 transitions. [2020-09-04 18:03:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 18:03:52,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 454 [2020-09-04 18:03:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:53,048 INFO L225 Difference]: With dead ends: 35678 [2020-09-04 18:03:53,048 INFO L226 Difference]: Without dead ends: 24113 [2020-09-04 18:03:53,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 18:03:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24113 states. [2020-09-04 18:03:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24113 to 12224. [2020-09-04 18:03:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12224 states. [2020-09-04 18:03:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 15110 transitions. [2020-09-04 18:03:54,313 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 15110 transitions. Word has length 454 [2020-09-04 18:03:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:54,314 INFO L479 AbstractCegarLoop]: Abstraction has 12224 states and 15110 transitions. [2020-09-04 18:03:54,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 18:03:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 15110 transitions. [2020-09-04 18:03:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-09-04 18:03:54,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:54,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:54,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 18:03:54,332 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash -288840865, now seen corresponding path program 1 times [2020-09-04 18:03:54,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:54,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179286903] [2020-09-04 18:03:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:54,336 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 18:03:54,445 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 18:03:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 18:03:54,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 18:03:55,163 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 18:03:55,163 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 18:03:55,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 18:03:55,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 06:03:55 BoogieIcfgContainer [2020-09-04 18:03:55,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 18:03:55,223 INFO L168 Benchmark]: Toolchain (without parser) took 50966.06 ms. Allocated memory was 146.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 101.4 MB in the beginning and 749.5 MB in the end (delta: -648.1 MB). Peak memory consumption was 673.6 MB. Max. memory is 7.1 GB. [2020-09-04 18:03:55,224 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 146.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 420.0 kB). Peak memory consumption was 420.0 kB. Max. memory is 7.1 GB. [2020-09-04 18:03:55,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 961.78 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 101.4 MB in the beginning and 169.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. [2020-09-04 18:03:55,226 INFO L168 Benchmark]: Boogie Preprocessor took 101.36 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 164.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. [2020-09-04 18:03:55,227 INFO L168 Benchmark]: RCFGBuilder took 2064.69 ms. Allocated memory was 204.5 MB in the beginning and 237.5 MB in the end (delta: 33.0 MB). Free memory was 164.1 MB in the beginning and 112.0 MB in the end (delta: 52.1 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. [2020-09-04 18:03:55,228 INFO L168 Benchmark]: TraceAbstraction took 47831.92 ms. Allocated memory was 237.5 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 112.0 MB in the beginning and 749.5 MB in the end (delta: -637.5 MB). Peak memory consumption was 593.0 MB. Max. memory is 7.1 GB. [2020-09-04 18:03:55,231 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 146.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 420.0 kB). Peak memory consumption was 420.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 961.78 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 101.4 MB in the beginning and 169.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.36 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 164.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2064.69 ms. Allocated memory was 204.5 MB in the beginning and 237.5 MB in the end (delta: 33.0 MB). Free memory was 164.1 MB in the beginning and 112.0 MB in the end (delta: 52.1 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 47831.92 ms. Allocated memory was 237.5 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 112.0 MB in the beginning and 749.5 MB in the end (delta: -637.5 MB). Peak memory consumption was 593.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 910]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L15] msg_t nomsg = (msg_t )-1; [L16] port_t p12 = 0; [L17] char p12_old = '\x0'; [L18] char p12_new = '\x0'; [L19] _Bool ep12 = 0; [L20] port_t p13 = 0; [L21] char p13_old = '\x0'; [L22] char p13_new = '\x0'; [L23] _Bool ep13 = 0; [L24] port_t p21 = 0; [L25] char p21_old = '\x0'; [L26] char p21_new = '\x0'; [L27] _Bool ep21 = 0; [L28] port_t p23 = 0; [L29] char p23_old = '\x0'; [L30] char p23_new = '\x0'; [L31] _Bool ep23 = 0; [L32] port_t p31 = 0; [L33] char p31_old = '\x0'; [L34] char p31_new = '\x0'; [L35] _Bool ep31 = 0; [L36] port_t p32 = 0; [L37] char p32_old = '\x0'; [L38] char p32_new = '\x0'; [L39] _Bool ep32 = 0; [L40] char id1 = '\x0'; [L41] unsigned char r1 = '\x0'; [L42] char st1 = '\x0'; [L43] char nl1 = '\x0'; [L44] char m1 = '\x0'; [L45] char max1 = '\x0'; [L46] _Bool mode1 = 0; [L47] _Bool newmax1 = 0; [L48] char id2 = '\x0'; [L49] unsigned char r2 = '\x0'; [L50] char st2 = '\x0'; [L51] char nl2 = '\x0'; [L52] char m2 = '\x0'; [L53] char max2 = '\x0'; [L54] _Bool mode2 = 0; [L55] _Bool newmax2 = 0; [L56] char id3 = '\x0'; [L57] unsigned char r3 = '\x0'; [L58] char st3 = '\x0'; [L59] char nl3 = '\x0'; [L60] char m3 = '\x0'; [L61] char max3 = '\x0'; [L62] _Bool mode3 = 0; [L63] _Bool newmax3 = 0; [L67] void (*nodes[3])() = { &node1, &node2, &node3 }; [L71] int __return_1873; [L72] int __return_2019; [L73] int __return_2152; [L74] int __return_2288; [L75] int __return_2426; [L76] int __return_2551; [L79] int main__c1; [L80] int main__i2; [L81] main__c1 = 0 [L82] ep12 = __VERIFIER_nondet_bool() [L83] ep13 = __VERIFIER_nondet_bool() [L84] ep21 = __VERIFIER_nondet_bool() [L85] ep23 = __VERIFIER_nondet_bool() [L86] ep31 = __VERIFIER_nondet_bool() [L87] ep32 = __VERIFIER_nondet_bool() [L88] id1 = __VERIFIER_nondet_char() [L89] r1 = __VERIFIER_nondet_uchar() [L90] st1 = __VERIFIER_nondet_char() [L91] nl1 = __VERIFIER_nondet_char() [L92] m1 = __VERIFIER_nondet_char() [L93] max1 = __VERIFIER_nondet_char() [L94] mode1 = __VERIFIER_nondet_bool() [L95] newmax1 = __VERIFIER_nondet_bool() [L96] id2 = __VERIFIER_nondet_char() [L97] r2 = __VERIFIER_nondet_uchar() [L98] st2 = __VERIFIER_nondet_char() [L99] nl2 = __VERIFIER_nondet_char() [L100] m2 = __VERIFIER_nondet_char() [L101] max2 = __VERIFIER_nondet_char() [L102] mode2 = __VERIFIER_nondet_bool() [L103] newmax2 = __VERIFIER_nondet_bool() [L104] id3 = __VERIFIER_nondet_char() [L105] r3 = __VERIFIER_nondet_uchar() [L106] st3 = __VERIFIER_nondet_char() [L107] nl3 = __VERIFIER_nondet_char() [L108] m3 = __VERIFIER_nondet_char() [L109] max3 = __VERIFIER_nondet_char() [L110] mode3 = __VERIFIER_nondet_bool() [L111] newmax3 = __VERIFIER_nondet_bool() [L113] _Bool init__r121; [L114] _Bool init__r131; [L115] _Bool init__r211; [L116] _Bool init__r231; [L117] _Bool init__r311; [L118] _Bool init__r321; [L119] _Bool init__r122; [L120] int init__tmp; [L121] _Bool init__r132; [L122] int init__tmp___0; [L123] _Bool init__r212; [L124] int init__tmp___1; [L125] _Bool init__r232; [L126] int init__tmp___2; [L127] _Bool init__r312; [L128] int init__tmp___3; [L129] _Bool init__r322; [L130] int init__tmp___4; [L131] int init__tmp___5; [L132] init__r121 = ep12 [L133] init__r131 = ep13 [L134] init__r211 = ep21 [L135] init__r231 = ep23 [L136] init__r311 = ep31 [L137] init__r321 = ep32 [L138] COND FALSE !(!(init__r121 == 0)) [L2454] COND FALSE !(!(init__r131 == 0)) [L2470] init__tmp = 0 [L142] init__r122 = (_Bool)init__tmp [L143] COND FALSE !(!(init__r131 == 0)) [L2431] COND FALSE !(!(init__r121 == 0)) [L2447] init__tmp___0 = 0 [L147] init__r132 = (_Bool)init__tmp___0 [L148] COND FALSE !(!(init__r211 == 0)) [L2408] COND FALSE !(!(init__r231 == 0)) [L2424] init__tmp___1 = 0 [L152] init__r212 = (_Bool)init__tmp___1 [L153] COND FALSE !(!(init__r231 == 0)) [L2385] COND FALSE !(!(init__r211 == 0)) [L2401] init__tmp___2 = 0 [L157] init__r232 = (_Bool)init__tmp___2 [L158] COND FALSE !(!(init__r311 == 0)) [L2362] COND FALSE !(!(init__r321 == 0)) [L2378] init__tmp___3 = 0 [L162] init__r312 = (_Bool)init__tmp___3 [L163] COND FALSE !(!(init__r321 == 0)) [L2339] COND FALSE !(!(init__r311 == 0)) [L2355] init__tmp___4 = 0 [L167] init__r322 = (_Bool)init__tmp___4 [L168] COND TRUE ((int)id1) != ((int)id2) [L170] COND TRUE ((int)id1) != ((int)id3) [L172] COND TRUE ((int)id2) != ((int)id3) [L174] COND TRUE ((int)id1) >= 0 [L176] COND TRUE ((int)id2) >= 0 [L178] COND TRUE ((int)id3) >= 0 [L180] COND TRUE ((int)r1) == 0 [L182] COND TRUE ((int)r2) == 0 [L184] COND TRUE ((int)r3) == 0 [L186] COND TRUE ((int)max1) == ((int)id1) [L188] COND TRUE ((int)max2) == ((int)id2) [L190] COND TRUE ((int)max3) == ((int)id3) [L192] COND TRUE ((int)st1) == 0 [L194] COND TRUE ((int)st2) == 0 [L196] COND TRUE ((int)st3) == 0 [L198] COND TRUE ((int)nl1) == 0 [L200] COND TRUE ((int)nl2) == 0 [L202] COND TRUE ((int)nl3) == 0 [L204] COND TRUE ((int)mode1) == 0 [L206] COND TRUE ((int)mode2) == 0 [L208] COND TRUE ((int)mode3) == 0 [L210] COND TRUE !(newmax1 == 0) [L212] COND TRUE !(newmax2 == 0) [L214] COND TRUE !(newmax3 == 0) [L216] init__tmp___5 = 1 [L217] __return_1873 = init__tmp___5 [L218] main__i2 = __return_1873 [L219] COND TRUE main__i2 != 0 [L221] p12_old = nomsg [L222] p12_new = nomsg [L223] p13_old = nomsg [L224] p13_new = nomsg [L225] p21_old = nomsg [L226] p21_new = nomsg [L227] p23_old = nomsg [L228] p23_new = nomsg [L229] p31_old = nomsg [L230] p31_new = nomsg [L231] p32_old = nomsg [L232] p32_new = nomsg [L233] main__i2 = 0 [L235] _Bool node1__newmax; [L236] node1__newmax = 0 [L237] COND FALSE !(!(mode1 == 0)) [L243] COND TRUE ((int)r1) < 2 [L245] COND FALSE !(!(ep12 == 0)) [L258] COND FALSE !(!(ep13 == 0)) [L271] mode1 = 1 [L273] _Bool node2__newmax; [L274] node2__newmax = 0 [L275] COND FALSE !(!(mode2 == 0)) [L281] COND TRUE ((int)r2) < 2 [L283] COND FALSE !(!(ep21 == 0)) [L296] COND FALSE !(!(ep23 == 0)) [L309] mode2 = 1 [L311] _Bool node3__newmax; [L312] node3__newmax = 0 [L313] COND FALSE !(!(mode3 == 0)) [L319] COND TRUE ((int)r3) < 2 [L321] COND FALSE !(!(ep31 == 0)) [L334] COND FALSE !(!(ep32 == 0)) [L347] mode3 = 1 [L348] p12_old = p12_new [L349] p12_new = nomsg [L350] p13_old = p13_new [L351] p13_new = nomsg [L352] p21_old = p21_new [L353] p21_new = nomsg [L354] p23_old = p23_new [L355] p23_new = nomsg [L356] p31_old = p31_new [L357] p31_new = nomsg [L358] p32_old = p32_new [L359] p32_new = nomsg [L361] int check__tmp; [L362] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L364] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L366] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L368] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L370] COND FALSE !(((int)r1) >= 2) [L376] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L378] COND TRUE ((int)r1) < 2 [L380] COND FALSE !(((int)r1) >= 2) [L386] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L388] COND TRUE ((int)r1) < 2 [L390] check__tmp = 1 [L391] __return_2019 = check__tmp [L392] main__c1 = __return_2019 [L394] _Bool __tmp_1; [L395] __tmp_1 = main__c1 [L396] _Bool assert__arg; [L397] assert__arg = __tmp_1 [L398] COND FALSE !(assert__arg == 0) [L405] _Bool node1__newmax; [L406] node1__newmax = 0 [L407] COND TRUE !(mode1 == 0) [L409] COND FALSE !(r1 == 255) [L415] r1 = r1 + 1 [L416] COND FALSE !(!(ep21 == 0)) [L425] COND FALSE !(!(ep31 == 0)) [L434] newmax1 = node1__newmax [L435] COND FALSE !(((int)r1) == 2) [L441] mode1 = 0 [L443] _Bool node2__newmax; [L444] node2__newmax = 0 [L445] COND TRUE !(mode2 == 0) [L447] COND FALSE !(r2 == 255) [L453] r2 = r2 + 1 [L454] COND FALSE !(!(ep12 == 0)) [L463] COND FALSE !(!(ep32 == 0)) [L472] newmax2 = node2__newmax [L473] COND FALSE !(((int)r2) == 2) [L479] mode2 = 0 [L481] _Bool node3__newmax; [L482] node3__newmax = 0 [L483] COND TRUE !(mode3 == 0) [L485] COND FALSE !(r3 == 255) [L491] r3 = r3 + 1 [L492] COND FALSE !(!(ep13 == 0)) [L501] COND FALSE !(!(ep23 == 0)) [L510] newmax3 = node3__newmax [L511] COND FALSE !(((int)r3) == 2) [L517] mode3 = 0 [L518] p12_old = p12_new [L519] p12_new = nomsg [L520] p13_old = p13_new [L521] p13_new = nomsg [L522] p21_old = p21_new [L523] p21_new = nomsg [L524] p23_old = p23_new [L525] p23_new = nomsg [L526] p31_old = p31_new [L527] p31_new = nomsg [L528] p32_old = p32_new [L529] p32_new = nomsg [L531] int check__tmp; [L532] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L534] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L536] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L538] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L540] COND FALSE !(((int)r1) >= 2) [L546] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L548] COND TRUE ((int)r1) < 2 [L550] COND FALSE !(((int)r1) >= 2) [L556] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L558] COND TRUE ((int)r1) < 2 [L560] check__tmp = 1 [L561] __return_2152 = check__tmp [L562] main__c1 = __return_2152 [L564] _Bool __tmp_2; [L565] __tmp_2 = main__c1 [L566] _Bool assert__arg; [L567] assert__arg = __tmp_2 [L568] COND FALSE !(assert__arg == 0) [L575] _Bool node1__newmax; [L576] node1__newmax = 0 [L577] COND FALSE !(!(mode1 == 0)) [L583] COND TRUE ((int)r1) < 2 [L585] COND FALSE !(!(ep12 == 0)) [L598] COND FALSE !(!(ep13 == 0)) [L611] mode1 = 1 [L613] _Bool node2__newmax; [L614] node2__newmax = 0 [L615] COND FALSE !(!(mode2 == 0)) [L621] COND TRUE ((int)r2) < 2 [L623] COND FALSE !(!(ep21 == 0)) [L636] COND FALSE !(!(ep23 == 0)) [L649] mode2 = 1 [L651] _Bool node3__newmax; [L652] node3__newmax = 0 [L653] COND FALSE !(!(mode3 == 0)) [L659] COND TRUE ((int)r3) < 2 [L661] COND FALSE !(!(ep31 == 0)) [L674] COND FALSE !(!(ep32 == 0)) [L687] mode3 = 1 [L688] p12_old = p12_new [L689] p12_new = nomsg [L690] p13_old = p13_new [L691] p13_new = nomsg [L692] p21_old = p21_new [L693] p21_new = nomsg [L694] p23_old = p23_new [L695] p23_new = nomsg [L696] p31_old = p31_new [L697] p31_new = nomsg [L698] p32_old = p32_new [L699] p32_new = nomsg [L701] int check__tmp; [L702] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L704] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L706] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L708] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L710] COND FALSE !(((int)r1) >= 2) [L716] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L718] COND TRUE ((int)r1) < 2 [L720] COND FALSE !(((int)r1) >= 2) [L726] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L728] COND TRUE ((int)r1) < 2 [L730] check__tmp = 1 [L731] __return_2288 = check__tmp [L732] main__c1 = __return_2288 [L734] _Bool __tmp_3; [L735] __tmp_3 = main__c1 [L736] _Bool assert__arg; [L737] assert__arg = __tmp_3 [L738] COND FALSE !(assert__arg == 0) [L745] _Bool node1__newmax; [L746] node1__newmax = 0 [L747] COND TRUE !(mode1 == 0) [L749] COND FALSE !(r1 == 255) [L755] r1 = r1 + 1 [L756] COND FALSE !(!(ep21 == 0)) [L765] COND FALSE !(!(ep31 == 0)) [L774] newmax1 = node1__newmax [L775] COND TRUE ((int)r1) == 2 [L777] COND TRUE ((int)max1) == ((int)id1) [L779] st1 = 1 [L781] mode1 = 0 [L783] _Bool node2__newmax; [L784] node2__newmax = 0 [L785] COND TRUE !(mode2 == 0) [L787] COND FALSE !(r2 == 255) [L793] r2 = r2 + 1 [L794] COND FALSE !(!(ep12 == 0)) [L803] COND FALSE !(!(ep32 == 0)) [L812] newmax2 = node2__newmax [L813] COND TRUE ((int)r2) == 2 [L815] COND TRUE ((int)max2) == ((int)id2) [L817] st2 = 1 [L819] mode2 = 0 [L821] _Bool node3__newmax; [L822] node3__newmax = 0 [L823] COND TRUE !(mode3 == 0) [L825] COND FALSE !(r3 == 255) [L831] r3 = r3 + 1 [L832] COND FALSE !(!(ep13 == 0)) [L841] COND FALSE !(!(ep23 == 0)) [L850] newmax3 = node3__newmax [L851] COND TRUE ((int)r3) == 2 [L853] COND TRUE ((int)max3) == ((int)id3) [L855] st3 = 1 [L857] mode3 = 0 [L858] p12_old = p12_new [L859] p12_new = nomsg [L860] p13_old = p13_new [L861] p13_new = nomsg [L862] p21_old = p21_new [L863] p21_new = nomsg [L864] p23_old = p23_new [L865] p23_new = nomsg [L866] p31_old = p31_new [L867] p31_new = nomsg [L868] p32_old = p32_new [L869] p32_new = nomsg [L871] int check__tmp; [L872] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1568] check__tmp = 0 [L900] __return_2426 = check__tmp [L901] main__c1 = __return_2426 [L904] _Bool __tmp_4; [L905] __tmp_4 = main__c1 [L906] _Bool assert__arg; [L907] assert__arg = __tmp_4 [L908] COND TRUE assert__arg == 0 [L910] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 908 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 47.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 34.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10102 SDtfs, 8392 SDslu, 7613 SDs, 0 SdLazy, 10492 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12224occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 8 MinimizatonAttempts, 22439 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...