./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:36:29,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:36:29,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:36:29,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:36:29,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:36:29,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:36:29,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:36:29,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:36:29,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:36:29,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:36:29,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:36:29,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:36:29,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:36:29,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:36:29,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:36:29,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:36:29,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:36:29,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:36:29,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:36:29,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:36:29,597 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:36:29,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:36:29,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:36:29,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:36:29,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:36:29,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:36:29,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:36:29,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:36:29,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:36:29,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:36:29,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:36:29,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:36:29,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:36:29,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:36:29,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:36:29,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:36:29,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:36:29,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:36:29,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:36:29,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:36:29,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:36:29,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:36:29,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:36:29,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:36:29,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:36:29,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:36:29,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:36:29,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:36:29,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:36:29,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:36:29,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:36:29,637 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:36:29,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:36:29,638 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:36:29,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:36:29,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:36:29,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:36:29,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:36:29,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:36:29,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:36:29,639 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:36:29,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:36:29,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:36:29,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:36:29,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:36:29,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:36:29,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:36:29,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:36:29,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:36:29,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:36:29,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:36:29,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:36:29,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:36:29,642 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:36:29,642 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:36:29,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:36:29,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2022-07-13 15:36:29,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:36:29,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:36:29,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:36:29,837 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:36:29,838 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:36:29,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2022-07-13 15:36:29,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d437ed7/cc8da3fc8cba4b889441395c5b437a75/FLAG04e7c6d04 [2022-07-13 15:36:30,270 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:36:30,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2022-07-13 15:36:30,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d437ed7/cc8da3fc8cba4b889441395c5b437a75/FLAG04e7c6d04 [2022-07-13 15:36:30,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d437ed7/cc8da3fc8cba4b889441395c5b437a75 [2022-07-13 15:36:30,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:36:30,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:36:30,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:36:30,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:36:30,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:36:30,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33cc5a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30, skipping insertion in model container [2022-07-13 15:36:30,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:36:30,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:36:30,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2022-07-13 15:36:30,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:36:30,440 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:36:30,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2022-07-13 15:36:30,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:36:30,470 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:36:30,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30 WrapperNode [2022-07-13 15:36:30,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:36:30,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:36:30,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:36:30,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:36:30,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,497 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-13 15:36:30,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:36:30,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:36:30,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:36:30,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:36:30,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:36:30,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:36:30,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:36:30,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:36:30,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (1/1) ... [2022-07-13 15:36:30,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:36:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:30,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:36:30,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:36:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:36:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:36:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:36:30,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:36:30,637 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:36:30,638 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:36:30,718 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:36:30,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:36:30,723 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 15:36:30,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:36:30 BoogieIcfgContainer [2022-07-13 15:36:30,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:36:30,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:36:30,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:36:30,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:36:30,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:36:30" (1/3) ... [2022-07-13 15:36:30,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797de3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:36:30, skipping insertion in model container [2022-07-13 15:36:30,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:30" (2/3) ... [2022-07-13 15:36:30,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797de3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:36:30, skipping insertion in model container [2022-07-13 15:36:30,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:36:30" (3/3) ... [2022-07-13 15:36:30,730 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2022-07-13 15:36:30,738 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:36:30,738 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:36:30,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:36:30,770 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@177db2a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@489d226 [2022-07-13 15:36:30,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:36:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 15:36:30,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:30,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:30,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2022-07-13 15:36:30,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:30,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949578221] [2022-07-13 15:36:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:30,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949578221] [2022-07-13 15:36:30,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949578221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:30,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:30,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:36:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534378562] [2022-07-13 15:36:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:30,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:36:30,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:36:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:36:30,882 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:30,890 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-07-13 15:36:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:36:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 15:36:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:30,897 INFO L225 Difference]: With dead ends: 34 [2022-07-13 15:36:30,897 INFO L226 Difference]: Without dead ends: 15 [2022-07-13 15:36:30,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:36:30,903 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:30,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-13 15:36:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-13 15:36:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-07-13 15:36:30,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2022-07-13 15:36:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:30,926 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-07-13 15:36:30,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-07-13 15:36:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 15:36:30,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:30,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:30,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:36:30,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2022-07-13 15:36:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524526040] [2022-07-13 15:36:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:30,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:31,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524526040] [2022-07-13 15:36:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524526040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:31,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:31,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 15:36:31,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699089030] [2022-07-13 15:36:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:31,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:36:31,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:31,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:36:31,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:36:31,045 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:31,064 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-07-13 15:36:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:36:31,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-13 15:36:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:31,065 INFO L225 Difference]: With dead ends: 20 [2022-07-13 15:36:31,066 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 15:36:31,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:36:31,067 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:31,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 15:36:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-13 15:36:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-13 15:36:31,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-07-13 15:36:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:31,071 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-13 15:36:31,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-13 15:36:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 15:36:31,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:31,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:36:31,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2022-07-13 15:36:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663833220] [2022-07-13 15:36:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663833220] [2022-07-13 15:36:31,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663833220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:31,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:31,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:36:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160043989] [2022-07-13 15:36:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:36:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:36:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:36:31,119 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:31,152 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-07-13 15:36:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:36:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 15:36:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:31,153 INFO L225 Difference]: With dead ends: 34 [2022-07-13 15:36:31,153 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 15:36:31,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:36:31,154 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:31,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 15:36:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-07-13 15:36:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-13 15:36:31,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2022-07-13 15:36:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:31,158 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-13 15:36:31,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-13 15:36:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 15:36:31,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:31,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:31,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:36:31,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2022-07-13 15:36:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:31,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371069807] [2022-07-13 15:36:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:31,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371069807] [2022-07-13 15:36:31,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371069807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198148376] [2022-07-13 15:36:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:31,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:31,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:31,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:31,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:36:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:31,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:36:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198148376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:31,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:31,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-07-13 15:36:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888880196] [2022-07-13 15:36:31,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:31,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 15:36:31,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:31,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 15:36:31,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:36:31,380 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:31,493 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-07-13 15:36:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:36:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 15:36:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:31,494 INFO L225 Difference]: With dead ends: 45 [2022-07-13 15:36:31,494 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 15:36:31,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-07-13 15:36:31,496 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:31,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 15:36:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-07-13 15:36:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-13 15:36:31,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-07-13 15:36:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:31,501 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-13 15:36:31,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-13 15:36:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 15:36:31,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:31,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:31,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:31,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:31,720 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:31,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2022-07-13 15:36:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:31,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875080593] [2022-07-13 15:36:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875080593] [2022-07-13 15:36:31,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875080593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467893677] [2022-07-13 15:36:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:36:31,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:31,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:31,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:36:31,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:36:31,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 15:36:31,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:31,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467893677] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:31,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:31,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-07-13 15:36:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681413009] [2022-07-13 15:36:31,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 15:36:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 15:36:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:36:31,941 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:32,104 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-07-13 15:36:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 15:36:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 15:36:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:32,106 INFO L225 Difference]: With dead ends: 61 [2022-07-13 15:36:32,106 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 15:36:32,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:36:32,107 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:32,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 59 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 15:36:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2022-07-13 15:36:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-13 15:36:32,112 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2022-07-13 15:36:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:32,112 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-13 15:36:32,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-13 15:36:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:36:32,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:32,113 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:32,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:32,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:32,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2022-07-13 15:36:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:32,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085748898] [2022-07-13 15:36:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:32,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085748898] [2022-07-13 15:36:32,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085748898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381704491] [2022-07-13 15:36:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:36:32,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:32,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:32,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:32,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:36:32,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 15:36:32,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 15:36:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:32,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:32,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381704491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:32,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:32,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2022-07-13 15:36:32,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100478632] [2022-07-13 15:36:32,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 15:36:32,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:32,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 15:36:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:36:32,580 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:32,791 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-07-13 15:36:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 15:36:32,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 15:36:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:32,792 INFO L225 Difference]: With dead ends: 75 [2022-07-13 15:36:32,792 INFO L226 Difference]: Without dead ends: 56 [2022-07-13 15:36:32,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-07-13 15:36:32,793 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:32,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 93 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-13 15:36:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2022-07-13 15:36:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-07-13 15:36:32,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2022-07-13 15:36:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:32,798 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-07-13 15:36:32,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-07-13 15:36:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 15:36:32,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:32,799 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:32,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:33,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:33,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash -634009032, now seen corresponding path program 4 times [2022-07-13 15:36:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:33,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132321229] [2022-07-13 15:36:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:33,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:33,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132321229] [2022-07-13 15:36:33,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132321229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649166322] [2022-07-13 15:36:33,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:36:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:33,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:33,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:36:33,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:36:33,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 15:36:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:33,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:33,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649166322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:33,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:33,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-13 15:36:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602927073] [2022-07-13 15:36:33,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 15:36:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 15:36:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-07-13 15:36:33,364 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:33,481 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2022-07-13 15:36:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:36:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-13 15:36:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:33,482 INFO L225 Difference]: With dead ends: 82 [2022-07-13 15:36:33,482 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 15:36:33,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:36:33,482 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:33,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 15:36:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2022-07-13 15:36:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-07-13 15:36:33,486 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2022-07-13 15:36:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:33,486 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-07-13 15:36:33,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-07-13 15:36:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 15:36:33,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:33,487 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:33,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:33,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1017343069, now seen corresponding path program 5 times [2022-07-13 15:36:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523088156] [2022-07-13 15:36:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523088156] [2022-07-13 15:36:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523088156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:33,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305373706] [2022-07-13 15:36:33,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:36:33,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:33,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:33,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:33,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:36:33,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 15:36:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 15:36:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:33,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305373706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:33,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:33,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-13 15:36:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816499328] [2022-07-13 15:36:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 15:36:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 15:36:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:36:33,890 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:33,975 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-07-13 15:36:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 15:36:33,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-13 15:36:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:33,976 INFO L225 Difference]: With dead ends: 56 [2022-07-13 15:36:33,976 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 15:36:33,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-07-13 15:36:33,976 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:33,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 15:36:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2022-07-13 15:36:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-07-13 15:36:33,981 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2022-07-13 15:36:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:33,981 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-07-13 15:36:33,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-07-13 15:36:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 15:36:33,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:33,982 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:34,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:34,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1327501635, now seen corresponding path program 6 times [2022-07-13 15:36:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141954494] [2022-07-13 15:36:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141954494] [2022-07-13 15:36:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141954494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428284379] [2022-07-13 15:36:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:36:34,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:34,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:36:34,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-13 15:36:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 15:36:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:34,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:34,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428284379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:34,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:34,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-07-13 15:36:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336290800] [2022-07-13 15:36:34,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 15:36:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 15:36:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-07-13 15:36:34,553 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:34,745 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2022-07-13 15:36:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 15:36:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-13 15:36:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:34,746 INFO L225 Difference]: With dead ends: 133 [2022-07-13 15:36:34,746 INFO L226 Difference]: Without dead ends: 79 [2022-07-13 15:36:34,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 15:36:34,748 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:34,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 165 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-13 15:36:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2022-07-13 15:36:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-07-13 15:36:34,752 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2022-07-13 15:36:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:34,752 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-07-13 15:36:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-07-13 15:36:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 15:36:34,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:34,753 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:34,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:34,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:34,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash 359898061, now seen corresponding path program 7 times [2022-07-13 15:36:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266025274] [2022-07-13 15:36:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:35,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:35,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266025274] [2022-07-13 15:36:35,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266025274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:35,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047561677] [2022-07-13 15:36:35,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:36:35,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:35,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:35,063 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:35,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:36:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:35,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:36:35,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:35,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:35,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047561677] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:35,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:35,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2022-07-13 15:36:35,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500858181] [2022-07-13 15:36:35,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 15:36:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 15:36:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-13 15:36:35,222 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:35,313 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-07-13 15:36:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 15:36:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-13 15:36:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:35,314 INFO L225 Difference]: With dead ends: 68 [2022-07-13 15:36:35,314 INFO L226 Difference]: Without dead ends: 66 [2022-07-13 15:36:35,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2022-07-13 15:36:35,315 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:35,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 99 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-13 15:36:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-07-13 15:36:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-07-13 15:36:35,320 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2022-07-13 15:36:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:35,321 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-07-13 15:36:35,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-07-13 15:36:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 15:36:35,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:35,322 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:35,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:35,535 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash -968765261, now seen corresponding path program 8 times [2022-07-13 15:36:35,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:35,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897886549] [2022-07-13 15:36:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:35,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:35,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897886549] [2022-07-13 15:36:35,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897886549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:35,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975500747] [2022-07-13 15:36:35,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:36:35,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:35,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:35,668 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:35,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:36:35,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:36:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 15:36:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:35,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975500747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:35,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:35,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2022-07-13 15:36:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226685095] [2022-07-13 15:36:35,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 15:36:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 15:36:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-07-13 15:36:35,944 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:36,080 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2022-07-13 15:36:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 15:36:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-13 15:36:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:36,081 INFO L225 Difference]: With dead ends: 130 [2022-07-13 15:36:36,081 INFO L226 Difference]: Without dead ends: 93 [2022-07-13 15:36:36,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 15:36:36,082 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:36,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-13 15:36:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2022-07-13 15:36:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-13 15:36:36,088 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2022-07-13 15:36:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:36,088 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-13 15:36:36,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-13 15:36:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 15:36:36,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:36,089 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:36,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:36,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 15:36:36,318 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2022-07-13 15:36:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444552742] [2022-07-13 15:36:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:36,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444552742] [2022-07-13 15:36:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444552742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:36,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063550235] [2022-07-13 15:36:36,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:36:36,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:36,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:36,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:36,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:36:36,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 15:36:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 15:36:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:36,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:36,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063550235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:36,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:36,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2022-07-13 15:36:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740658994] [2022-07-13 15:36:36,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 15:36:36,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 15:36:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-07-13 15:36:36,916 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:37,121 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2022-07-13 15:36:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 15:36:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-13 15:36:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:37,122 INFO L225 Difference]: With dead ends: 138 [2022-07-13 15:36:37,122 INFO L226 Difference]: Without dead ends: 99 [2022-07-13 15:36:37,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 15:36:37,124 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:37,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 190 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-13 15:36:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2022-07-13 15:36:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-13 15:36:37,133 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2022-07-13 15:36:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:37,134 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-13 15:36:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-13 15:36:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 15:36:37,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:37,135 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:37,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:37,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2022-07-13 15:36:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:37,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783563229] [2022-07-13 15:36:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783563229] [2022-07-13 15:36:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783563229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509295033] [2022-07-13 15:36:37,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:36:37,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:37,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:37,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:37,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 15:36:37,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:36:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 15:36:37,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:37,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509295033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:37,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:37,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2022-07-13 15:36:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330900166] [2022-07-13 15:36:37,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:37,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 15:36:37,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 15:36:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-07-13 15:36:37,671 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:37,830 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-13 15:36:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 15:36:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 15:36:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:37,831 INFO L225 Difference]: With dead ends: 80 [2022-07-13 15:36:37,831 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 15:36:37,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-07-13 15:36:37,832 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:37,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 138 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 15:36:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2022-07-13 15:36:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-07-13 15:36:37,836 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2022-07-13 15:36:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:37,837 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-07-13 15:36:37,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-07-13 15:36:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 15:36:37,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:37,838 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:37,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:38,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 15:36:38,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2022-07-13 15:36:38,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:38,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068697133] [2022-07-13 15:36:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:38,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:38,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068697133] [2022-07-13 15:36:38,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068697133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315648914] [2022-07-13 15:36:38,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:36:38,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:38,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:38,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 15:36:38,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-13 15:36:38,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 15:36:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:38,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315648914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:38,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:38,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-07-13 15:36:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087003794] [2022-07-13 15:36:38,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:38,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 15:36:38,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 15:36:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 15:36:38,705 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:39,016 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2022-07-13 15:36:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 15:36:39,016 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-13 15:36:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:39,017 INFO L225 Difference]: With dead ends: 205 [2022-07-13 15:36:39,017 INFO L226 Difference]: Without dead ends: 119 [2022-07-13 15:36:39,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 15:36:39,018 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:39,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 214 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-13 15:36:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2022-07-13 15:36:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-07-13 15:36:39,023 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2022-07-13 15:36:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:39,023 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-07-13 15:36:39,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-07-13 15:36:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 15:36:39,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:39,024 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:39,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 15:36:39,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2022-07-13 15:36:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522366600] [2022-07-13 15:36:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:39,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522366600] [2022-07-13 15:36:39,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522366600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579436126] [2022-07-13 15:36:39,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:36:39,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:39,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:39,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:39,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 15:36:39,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-13 15:36:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 15:36:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:39,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:39,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579436126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:39,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:39,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2022-07-13 15:36:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59852919] [2022-07-13 15:36:39,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 15:36:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 15:36:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2022-07-13 15:36:39,560 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:39,710 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-07-13 15:36:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 15:36:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-13 15:36:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:39,711 INFO L225 Difference]: With dead ends: 92 [2022-07-13 15:36:39,711 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 15:36:39,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-07-13 15:36:39,712 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:39,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 139 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 15:36:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2022-07-13 15:36:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-07-13 15:36:39,716 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2022-07-13 15:36:39,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:39,717 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-07-13 15:36:39,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-07-13 15:36:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 15:36:39,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:39,718 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:39,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:39,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 15:36:39,927 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2022-07-13 15:36:39,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603361152] [2022-07-13 15:36:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:39,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:40,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:40,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603361152] [2022-07-13 15:36:40,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603361152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:40,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774791842] [2022-07-13 15:36:40,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:36:40,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:40,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:40,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:40,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 15:36:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 15:36:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:40,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:40,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774791842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:40,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:40,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-07-13 15:36:40,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367698156] [2022-07-13 15:36:40,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:40,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 15:36:40,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:40,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 15:36:40,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 15:36:40,585 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:40,838 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2022-07-13 15:36:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 15:36:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-13 15:36:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:40,838 INFO L225 Difference]: With dead ends: 186 [2022-07-13 15:36:40,838 INFO L226 Difference]: Without dead ends: 133 [2022-07-13 15:36:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 15:36:40,839 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:40,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 330 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-13 15:36:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2022-07-13 15:36:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-07-13 15:36:40,844 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2022-07-13 15:36:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:40,844 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-07-13 15:36:40,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-07-13 15:36:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 15:36:40,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:40,845 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:40,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 15:36:41,055 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2022-07-13 15:36:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:41,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286988009] [2022-07-13 15:36:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:41,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286988009] [2022-07-13 15:36:41,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286988009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:41,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636011578] [2022-07-13 15:36:41,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:36:41,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:41,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:41,332 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:41,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 15:36:41,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:36:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 15:36:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:41,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636011578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:41,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:41,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2022-07-13 15:36:41,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424079641] [2022-07-13 15:36:41,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-13 15:36:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-13 15:36:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 15:36:41,739 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:42,484 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2022-07-13 15:36:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 15:36:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-13 15:36:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:42,485 INFO L225 Difference]: With dead ends: 201 [2022-07-13 15:36:42,485 INFO L226 Difference]: Without dead ends: 146 [2022-07-13 15:36:42,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1501, Invalid=7241, Unknown=0, NotChecked=0, Total=8742 [2022-07-13 15:36:42,487 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 340 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:42,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 200 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:36:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-13 15:36:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 91. [2022-07-13 15:36:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-07-13 15:36:42,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2022-07-13 15:36:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:42,506 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-07-13 15:36:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-07-13 15:36:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 15:36:42,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:42,506 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:42,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:42,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:42,723 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 15 times [2022-07-13 15:36:42,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:42,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314020613] [2022-07-13 15:36:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:42,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:42,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:42,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314020613] [2022-07-13 15:36:42,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314020613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:42,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671562828] [2022-07-13 15:36:42,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:36:42,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:42,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:42,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 15:36:42,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-13 15:36:42,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 15:36:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:43,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:43,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671562828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:43,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:43,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-07-13 15:36:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843830417] [2022-07-13 15:36:43,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:43,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 15:36:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:43,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 15:36:43,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 15:36:43,326 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:43,571 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2022-07-13 15:36:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 15:36:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-13 15:36:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:43,573 INFO L225 Difference]: With dead ends: 208 [2022-07-13 15:36:43,573 INFO L226 Difference]: Without dead ends: 149 [2022-07-13 15:36:43,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2022-07-13 15:36:43,586 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:43,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 322 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-13 15:36:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2022-07-13 15:36:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-13 15:36:43,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2022-07-13 15:36:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:43,592 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-13 15:36:43,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-13 15:36:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 15:36:43,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:43,593 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:43,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 15:36:43,794 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 16 times [2022-07-13 15:36:43,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:43,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809497267] [2022-07-13 15:36:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:43,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809497267] [2022-07-13 15:36:43,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809497267] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:43,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418070901] [2022-07-13 15:36:43,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:36:43,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:43,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:43,989 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:43,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 15:36:44,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:36:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:44,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 15:36:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:44,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418070901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:44,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:44,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2022-07-13 15:36:44,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646627188] [2022-07-13 15:36:44,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:44,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 15:36:44,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 15:36:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-07-13 15:36:44,200 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:44,399 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-07-13 15:36:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 15:36:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-13 15:36:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:44,400 INFO L225 Difference]: With dead ends: 110 [2022-07-13 15:36:44,400 INFO L226 Difference]: Without dead ends: 108 [2022-07-13 15:36:44,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 15:36:44,401 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:44,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 197 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-13 15:36:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2022-07-13 15:36:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-07-13 15:36:44,407 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2022-07-13 15:36:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:44,408 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-07-13 15:36:44,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-07-13 15:36:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-13 15:36:44,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:44,410 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:44,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:44,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:44,627 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 17 times [2022-07-13 15:36:44,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:44,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598851329] [2022-07-13 15:36:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:44,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598851329] [2022-07-13 15:36:44,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598851329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453790693] [2022-07-13 15:36:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:36:44,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:44,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:44,958 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:44,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 15:36:45,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-13 15:36:45,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:45,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 15:36:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:45,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453790693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:45,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:45,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2022-07-13 15:36:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873517269] [2022-07-13 15:36:45,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:45,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 15:36:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 15:36:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 15:36:45,542 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:46,070 INFO L93 Difference]: Finished difference Result 295 states and 332 transitions. [2022-07-13 15:36:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 15:36:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-07-13 15:36:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:46,071 INFO L225 Difference]: With dead ends: 295 [2022-07-13 15:36:46,071 INFO L226 Difference]: Without dead ends: 169 [2022-07-13 15:36:46,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2022-07-13 15:36:46,073 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 221 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:46,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 466 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:36:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-13 15:36:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2022-07-13 15:36:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-07-13 15:36:46,080 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2022-07-13 15:36:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:46,080 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-07-13 15:36:46,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-07-13 15:36:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 15:36:46,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:46,081 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:46,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:46,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:46,298 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 18 times [2022-07-13 15:36:46,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:46,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723921748] [2022-07-13 15:36:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:46,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:46,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723921748] [2022-07-13 15:36:46,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723921748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634783871] [2022-07-13 15:36:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:36:46,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:46,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:46,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 15:36:46,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-13 15:36:46,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 15:36:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:46,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:46,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634783871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:46,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:46,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2022-07-13 15:36:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530676170] [2022-07-13 15:36:46,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 15:36:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 15:36:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2022-07-13 15:36:46,743 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:46,944 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-07-13 15:36:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 15:36:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-07-13 15:36:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:46,945 INFO L225 Difference]: With dead ends: 122 [2022-07-13 15:36:46,945 INFO L226 Difference]: Without dead ends: 120 [2022-07-13 15:36:46,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 15:36:46,946 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 116 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:46,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 163 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-13 15:36:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2022-07-13 15:36:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-07-13 15:36:46,951 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2022-07-13 15:36:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:46,951 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-07-13 15:36:46,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-07-13 15:36:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 15:36:46,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:46,952 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:46,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:47,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 19 times [2022-07-13 15:36:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453723571] [2022-07-13 15:36:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:47,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453723571] [2022-07-13 15:36:47,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453723571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671787799] [2022-07-13 15:36:47,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:36:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:47,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:47,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:47,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 15:36:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:47,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 15:36:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:47,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:47,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671787799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:47,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:47,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2022-07-13 15:36:47,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332091109] [2022-07-13 15:36:47,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:47,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 15:36:47,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 15:36:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 15:36:47,998 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:48,242 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2022-07-13 15:36:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 15:36:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-13 15:36:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:48,243 INFO L225 Difference]: With dead ends: 256 [2022-07-13 15:36:48,243 INFO L226 Difference]: Without dead ends: 183 [2022-07-13 15:36:48,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 15:36:48,244 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 288 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:48,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 307 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-13 15:36:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2022-07-13 15:36:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-07-13 15:36:48,253 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2022-07-13 15:36:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:48,254 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-07-13 15:36:48,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-07-13 15:36:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-13 15:36:48,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:48,255 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:48,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:48,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:48,472 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 20 times [2022-07-13 15:36:48,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:48,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874589220] [2022-07-13 15:36:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:48,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874589220] [2022-07-13 15:36:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874589220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026104612] [2022-07-13 15:36:48,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:36:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:48,917 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:48,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 15:36:48,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:36:48,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:48,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 15:36:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:49,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:49,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026104612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:49,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:49,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-07-13 15:36:49,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376359324] [2022-07-13 15:36:49,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:49,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 15:36:49,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 15:36:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2022-07-13 15:36:49,406 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:49,689 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2022-07-13 15:36:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 15:36:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-13 15:36:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:49,693 INFO L225 Difference]: With dead ends: 264 [2022-07-13 15:36:49,693 INFO L226 Difference]: Without dead ends: 189 [2022-07-13 15:36:49,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2022-07-13 15:36:49,699 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 248 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:49,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 436 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-13 15:36:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2022-07-13 15:36:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-07-13 15:36:49,717 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2022-07-13 15:36:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:49,717 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-07-13 15:36:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-07-13 15:36:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-13 15:36:49,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:49,718 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:49,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 15:36:49,936 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 21 times [2022-07-13 15:36:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941382759] [2022-07-13 15:36:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:50,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941382759] [2022-07-13 15:36:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941382759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:50,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722638834] [2022-07-13 15:36:50,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:36:50,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:50,147 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:50,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 15:36:50,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-13 15:36:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:50,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 15:36:50,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:50,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:50,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722638834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:50,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:50,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2022-07-13 15:36:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969825845] [2022-07-13 15:36:50,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 15:36:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 15:36:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2022-07-13 15:36:50,419 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:50,639 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-07-13 15:36:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 15:36:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-07-13 15:36:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:50,640 INFO L225 Difference]: With dead ends: 134 [2022-07-13 15:36:50,640 INFO L226 Difference]: Without dead ends: 132 [2022-07-13 15:36:50,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 15:36:50,642 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:50,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 207 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-13 15:36:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-07-13 15:36:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-07-13 15:36:50,656 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2022-07-13 15:36:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:50,656 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-07-13 15:36:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-07-13 15:36:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-13 15:36:50,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:50,658 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:50,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 15:36:50,871 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 22 times [2022-07-13 15:36:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:50,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554383070] [2022-07-13 15:36:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:51,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554383070] [2022-07-13 15:36:51,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554383070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809365692] [2022-07-13 15:36:51,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:36:51,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:51,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:51,331 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:51,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 15:36:51,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:36:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 15:36:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:51,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:52,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809365692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:52,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:52,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2022-07-13 15:36:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891886899] [2022-07-13 15:36:52,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:52,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 15:36:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 15:36:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 15:36:52,070 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:52,823 INFO L93 Difference]: Finished difference Result 367 states and 412 transitions. [2022-07-13 15:36:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 15:36:52,823 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-07-13 15:36:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:52,824 INFO L225 Difference]: With dead ends: 367 [2022-07-13 15:36:52,824 INFO L226 Difference]: Without dead ends: 209 [2022-07-13 15:36:52,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2022-07-13 15:36:52,826 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 385 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:52,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 531 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:36:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-13 15:36:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2022-07-13 15:36:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-07-13 15:36:52,835 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2022-07-13 15:36:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:52,835 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-07-13 15:36:52,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-07-13 15:36:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 15:36:52,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:52,836 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:52,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:53,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:53,055 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 23 times [2022-07-13 15:36:53,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682063454] [2022-07-13 15:36:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:53,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682063454] [2022-07-13 15:36:53,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682063454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:53,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915772332] [2022-07-13 15:36:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:36:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:53,273 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:53,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 15:36:53,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-13 15:36:53,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-13 15:36:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:53,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:53,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915772332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:53,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:53,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2022-07-13 15:36:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999538897] [2022-07-13 15:36:53,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 15:36:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 15:36:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:36:53,569 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:53,839 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-07-13 15:36:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 15:36:53,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-13 15:36:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:53,840 INFO L225 Difference]: With dead ends: 146 [2022-07-13 15:36:53,840 INFO L226 Difference]: Without dead ends: 144 [2022-07-13 15:36:53,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 15:36:53,841 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:53,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 234 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-13 15:36:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-07-13 15:36:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-07-13 15:36:53,849 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2022-07-13 15:36:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:53,850 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-07-13 15:36:53,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-07-13 15:36:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-13 15:36:53,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:53,851 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:53,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:54,063 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 24 times [2022-07-13 15:36:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148965683] [2022-07-13 15:36:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148965683] [2022-07-13 15:36:54,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148965683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223423290] [2022-07-13 15:36:54,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:36:54,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:54,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:54,604 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:54,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 15:36:54,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-13 15:36:54,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 15:36:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:55,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:55,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223423290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:55,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:55,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2022-07-13 15:36:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343768921] [2022-07-13 15:36:55,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-13 15:36:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-13 15:36:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2022-07-13 15:36:55,645 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:56,464 INFO L93 Difference]: Finished difference Result 403 states and 452 transitions. [2022-07-13 15:36:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-13 15:36:56,464 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-13 15:36:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:56,465 INFO L225 Difference]: With dead ends: 403 [2022-07-13 15:36:56,466 INFO L226 Difference]: Without dead ends: 229 [2022-07-13 15:36:56,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2022-07-13 15:36:56,467 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 358 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:56,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 635 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:36:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-13 15:36:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2022-07-13 15:36:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-07-13 15:36:56,478 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2022-07-13 15:36:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:56,478 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-07-13 15:36:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-07-13 15:36:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-13 15:36:56,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:56,479 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:56,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-13 15:36:56,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 15:36:56,686 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 25 times [2022-07-13 15:36:56,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:56,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421678001] [2022-07-13 15:36:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:56,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421678001] [2022-07-13 15:36:57,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421678001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569130993] [2022-07-13 15:36:57,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:36:57,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:57,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:57,016 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:57,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 15:36:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-13 15:36:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:57,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569130993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:57,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:57,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2022-07-13 15:36:57,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967800183] [2022-07-13 15:36:57,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:57,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 15:36:57,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 15:36:57,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2022-07-13 15:36:57,305 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:57,628 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-07-13 15:36:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 15:36:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-13 15:36:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:57,631 INFO L225 Difference]: With dead ends: 158 [2022-07-13 15:36:57,631 INFO L226 Difference]: Without dead ends: 156 [2022-07-13 15:36:57,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1034, Invalid=1828, Unknown=0, NotChecked=0, Total=2862 [2022-07-13 15:36:57,632 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 184 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:57,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 235 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-13 15:36:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2022-07-13 15:36:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-07-13 15:36:57,642 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2022-07-13 15:36:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:57,642 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-07-13 15:36:57,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-07-13 15:36:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-13 15:36:57,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:57,643 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:57,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 15:36:57,859 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 26 times [2022-07-13 15:36:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:57,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711858041] [2022-07-13 15:36:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:58,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711858041] [2022-07-13 15:36:58,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711858041] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681879455] [2022-07-13 15:36:58,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:36:58,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:58,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:58,582 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:36:58,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 15:36:58,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:36:58,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:36:58,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 15:36:58,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:59,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:36:59,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681879455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:59,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:59,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2022-07-13 15:36:59,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790730962] [2022-07-13 15:36:59,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:59,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-13 15:36:59,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-13 15:36:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2022-07-13 15:36:59,672 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:00,278 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2022-07-13 15:37:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 15:37:00,279 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-07-13 15:37:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:00,292 INFO L225 Difference]: With dead ends: 340 [2022-07-13 15:37:00,292 INFO L226 Difference]: Without dead ends: 243 [2022-07-13 15:37:00,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2022-07-13 15:37:00,293 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 322 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:00,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 556 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:37:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-13 15:37:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2022-07-13 15:37:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-07-13 15:37:00,303 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2022-07-13 15:37:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:00,303 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-07-13 15:37:00,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-07-13 15:37:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-13 15:37:00,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:00,304 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:00,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 15:37:00,520 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 27 times [2022-07-13 15:37:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:00,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646520640] [2022-07-13 15:37:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646520640] [2022-07-13 15:37:01,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646520640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870412800] [2022-07-13 15:37:01,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:37:01,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:01,210 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:01,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 15:37:01,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-13 15:37:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 15:37:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:02,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:02,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870412800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:02,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:02,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27, 27] total 75 [2022-07-13 15:37:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35586418] [2022-07-13 15:37:02,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:02,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-13 15:37:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:02,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-13 15:37:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2022-07-13 15:37:02,191 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:04,066 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2022-07-13 15:37:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-13 15:37:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-07-13 15:37:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:04,074 INFO L225 Difference]: With dead ends: 355 [2022-07-13 15:37:04,075 INFO L226 Difference]: Without dead ends: 256 [2022-07-13 15:37:04,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9588 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4746, Invalid=24324, Unknown=0, NotChecked=0, Total=29070 [2022-07-13 15:37:04,078 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 613 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:04,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 370 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 15:37:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-13 15:37:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 157. [2022-07-13 15:37:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-07-13 15:37:04,106 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 150 [2022-07-13 15:37:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:04,106 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-07-13 15:37:04,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-07-13 15:37:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 15:37:04,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:04,107 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:04,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-13 15:37:04,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:04,322 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash -897123176, now seen corresponding path program 28 times [2022-07-13 15:37:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791250623] [2022-07-13 15:37:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1083 proven. 669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:05,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:05,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791250623] [2022-07-13 15:37:05,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791250623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:05,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276666260] [2022-07-13 15:37:05,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:37:05,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:05,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:05,043 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:05,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-13 15:37:05,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:37:05,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 15:37:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 600 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:05,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 600 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:05,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276666260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:05,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:05,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 28, 28] total 78 [2022-07-13 15:37:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963540048] [2022-07-13 15:37:05,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:05,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-13 15:37:05,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:05,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-13 15:37:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=4977, Unknown=0, NotChecked=0, Total=6006 [2022-07-13 15:37:05,834 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:07,502 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2022-07-13 15:37:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-13 15:37:07,502 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-07-13 15:37:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:07,503 INFO L225 Difference]: With dead ends: 369 [2022-07-13 15:37:07,503 INFO L226 Difference]: Without dead ends: 266 [2022-07-13 15:37:07,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5131, Invalid=26375, Unknown=0, NotChecked=0, Total=31506 [2022-07-13 15:37:07,506 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 610 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:07,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 438 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:37:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-13 15:37:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2022-07-13 15:37:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-07-13 15:37:07,519 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 156 [2022-07-13 15:37:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:07,520 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-07-13 15:37:07,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-07-13 15:37:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-13 15:37:07,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:07,521 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:07,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-13 15:37:07,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:07,737 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash -548974864, now seen corresponding path program 29 times [2022-07-13 15:37:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156217808] [2022-07-13 15:37:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1178 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156217808] [2022-07-13 15:37:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156217808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465041387] [2022-07-13 15:37:08,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:37:08,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:08,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:08,505 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:08,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 15:37:08,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-13 15:37:08,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-13 15:37:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:09,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:09,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465041387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:09,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2022-07-13 15:37:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197464106] [2022-07-13 15:37:09,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:09,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-13 15:37:09,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-13 15:37:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1515, Invalid=5127, Unknown=0, NotChecked=0, Total=6642 [2022-07-13 15:37:09,374 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:10,035 INFO L93 Difference]: Finished difference Result 376 states and 432 transitions. [2022-07-13 15:37:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 15:37:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-07-13 15:37:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:10,037 INFO L225 Difference]: With dead ends: 376 [2022-07-13 15:37:10,037 INFO L226 Difference]: Without dead ends: 269 [2022-07-13 15:37:10,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2921, Invalid=8635, Unknown=0, NotChecked=0, Total=11556 [2022-07-13 15:37:10,039 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 424 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:10,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 596 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:37:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-13 15:37:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 165. [2022-07-13 15:37:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-07-13 15:37:10,051 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 162 [2022-07-13 15:37:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:10,051 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-07-13 15:37:10,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-07-13 15:37:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-13 15:37:10,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:10,052 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:10,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-13 15:37:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:10,269 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 24503893, now seen corresponding path program 30 times [2022-07-13 15:37:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609521145] [2022-07-13 15:37:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:10,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:10,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609521145] [2022-07-13 15:37:10,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609521145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:10,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116651142] [2022-07-13 15:37:10,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:37:10,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:10,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:10,595 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:10,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-13 15:37:10,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-07-13 15:37:10,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-13 15:37:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:10,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:10,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116651142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:10,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:10,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 33 [2022-07-13 15:37:10,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088366866] [2022-07-13 15:37:10,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:10,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 15:37:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 15:37:10,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 15:37:10,965 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:11,201 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-07-13 15:37:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-13 15:37:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-07-13 15:37:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:11,202 INFO L225 Difference]: With dead ends: 182 [2022-07-13 15:37:11,202 INFO L226 Difference]: Without dead ends: 180 [2022-07-13 15:37:11,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1372, Invalid=2410, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 15:37:11,203 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 178 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:11,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 261 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:37:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-13 15:37:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2022-07-13 15:37:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-07-13 15:37:11,217 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 164 [2022-07-13 15:37:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:11,220 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-07-13 15:37:11,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-07-13 15:37:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-13 15:37:11,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:11,221 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:11,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:11,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-13 15:37:11,437 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash 481628987, now seen corresponding path program 31 times [2022-07-13 15:37:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:11,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454717086] [2022-07-13 15:37:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:11,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:12,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454717086] [2022-07-13 15:37:12,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454717086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:12,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283587903] [2022-07-13 15:37:12,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:37:12,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:12,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:12,131 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:12,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-13 15:37:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 15:37:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:37:13,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:37:13,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283587903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:13,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:13,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2022-07-13 15:37:13,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986655583] [2022-07-13 15:37:13,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-13 15:37:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-13 15:37:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2022-07-13 15:37:13,280 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:14,073 INFO L93 Difference]: Finished difference Result 396 states and 454 transitions. [2022-07-13 15:37:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 15:37:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-07-13 15:37:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:14,074 INFO L225 Difference]: With dead ends: 396 [2022-07-13 15:37:14,074 INFO L226 Difference]: Without dead ends: 283 [2022-07-13 15:37:14,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2022-07-13 15:37:14,075 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 371 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:14,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 622 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:37:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-13 15:37:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2022-07-13 15:37:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-07-13 15:37:14,088 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 172 [2022-07-13 15:37:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:14,088 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-07-13 15:37:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-07-13 15:37:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 15:37:14,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:14,089 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:14,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-13 15:37:14,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:14,303 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2129825696, now seen corresponding path program 32 times [2022-07-13 15:37:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:14,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988124905] [2022-07-13 15:37:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:15,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988124905] [2022-07-13 15:37:15,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988124905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169286263] [2022-07-13 15:37:15,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:37:15,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:15,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:15,178 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:15,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-13 15:37:15,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:37:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-13 15:37:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:16,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:16,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169286263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:16,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:16,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 31, 31] total 87 [2022-07-13 15:37:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351209888] [2022-07-13 15:37:16,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-13 15:37:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-13 15:37:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=6204, Unknown=0, NotChecked=0, Total=7482 [2022-07-13 15:37:16,217 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:17,794 INFO L93 Difference]: Finished difference Result 411 states and 472 transitions. [2022-07-13 15:37:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-13 15:37:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-07-13 15:37:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:17,796 INFO L225 Difference]: With dead ends: 411 [2022-07-13 15:37:17,796 INFO L226 Difference]: Without dead ends: 296 [2022-07-13 15:37:17,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6376, Invalid=33026, Unknown=0, NotChecked=0, Total=39402 [2022-07-13 15:37:17,799 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 633 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:17,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 479 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:37:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-13 15:37:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 181. [2022-07-13 15:37:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-07-13 15:37:17,815 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 174 [2022-07-13 15:37:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:17,815 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-07-13 15:37:17,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-07-13 15:37:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-13 15:37:17,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:17,816 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:17,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:18,032 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2022-07-13 15:37:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:18,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790870165] [2022-07-13 15:37:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:18,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790870165] [2022-07-13 15:37:18,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790870165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486610726] [2022-07-13 15:37:18,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:37:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:18,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:18,640 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:18,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-13 15:37:18,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-07-13 15:37:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 15:37:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 812 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:19,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 812 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:19,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486610726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:19,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:19,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 32, 32] total 90 [2022-07-13 15:37:19,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155565880] [2022-07-13 15:37:19,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:19,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-13 15:37:19,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-13 15:37:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=6643, Unknown=0, NotChecked=0, Total=8010 [2022-07-13 15:37:19,788 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:22,136 INFO L93 Difference]: Finished difference Result 425 states and 488 transitions. [2022-07-13 15:37:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-13 15:37:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-07-13 15:37:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:22,138 INFO L225 Difference]: With dead ends: 425 [2022-07-13 15:37:22,138 INFO L226 Difference]: Without dead ends: 306 [2022-07-13 15:37:22,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14123 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6821, Invalid=35409, Unknown=0, NotChecked=0, Total=42230 [2022-07-13 15:37:22,141 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 632 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:22,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 447 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 15:37:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-13 15:37:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 187. [2022-07-13 15:37:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-07-13 15:37:22,158 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 180 [2022-07-13 15:37:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:22,158 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-07-13 15:37:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-07-13 15:37:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-13 15:37:22,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:22,160 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:22,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-13 15:37:22,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-13 15:37:22,376 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:22,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2064523984, now seen corresponding path program 34 times [2022-07-13 15:37:22,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:22,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487947280] [2022-07-13 15:37:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:22,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1598 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:23,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487947280] [2022-07-13 15:37:23,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487947280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617635402] [2022-07-13 15:37:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:37:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:23,229 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:23,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-13 15:37:23,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:37:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-13 15:37:23,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 870 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:24,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 870 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:24,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617635402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:24,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:24,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 33, 33] total 93 [2022-07-13 15:37:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551785536] [2022-07-13 15:37:24,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-13 15:37:24,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:24,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-13 15:37:24,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1459, Invalid=7097, Unknown=0, NotChecked=0, Total=8556 [2022-07-13 15:37:24,599 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:26,748 INFO L93 Difference]: Finished difference Result 439 states and 504 transitions. [2022-07-13 15:37:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-07-13 15:37:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-07-13 15:37:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:26,750 INFO L225 Difference]: With dead ends: 439 [2022-07-13 15:37:26,750 INFO L226 Difference]: Without dead ends: 316 [2022-07-13 15:37:26,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15135 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7281, Invalid=37875, Unknown=0, NotChecked=0, Total=45156 [2022-07-13 15:37:26,752 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 813 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:26,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 516 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 15:37:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-13 15:37:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 193. [2022-07-13 15:37:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-07-13 15:37:26,769 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 186 [2022-07-13 15:37:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:26,769 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-07-13 15:37:26,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-07-13 15:37:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 15:37:26,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:26,770 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:26,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:26,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-13 15:37:26,984 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -720065944, now seen corresponding path program 35 times [2022-07-13 15:37:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405736886] [2022-07-13 15:37:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1713 proven. 1017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:27,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:27,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405736886] [2022-07-13 15:37:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405736886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531968354] [2022-07-13 15:37:27,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:37:27,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:27,773 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:27,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-13 15:37:27,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-13 15:37:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 15:37:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1800 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:28,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1800 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:28,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531968354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:28,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:28,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 97 [2022-07-13 15:37:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887047457] [2022-07-13 15:37:28,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:28,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-13 15:37:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-13 15:37:28,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=7197, Unknown=0, NotChecked=0, Total=9312 [2022-07-13 15:37:28,960 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:29,664 INFO L93 Difference]: Finished difference Result 446 states and 512 transitions. [2022-07-13 15:37:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-13 15:37:29,664 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-13 15:37:29,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:29,665 INFO L225 Difference]: With dead ends: 446 [2022-07-13 15:37:29,665 INFO L226 Difference]: Without dead ends: 319 [2022-07-13 15:37:29,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3583 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4101, Invalid=12155, Unknown=0, NotChecked=0, Total=16256 [2022-07-13 15:37:29,666 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 415 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:29,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 783 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:37:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-13 15:37:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2022-07-13 15:37:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-07-13 15:37:29,685 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 192 [2022-07-13 15:37:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:29,685 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-07-13 15:37:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-07-13 15:37:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-13 15:37:29,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:29,686 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:29,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-13 15:37:29,903 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 12059405, now seen corresponding path program 36 times [2022-07-13 15:37:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:29,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244015351] [2022-07-13 15:37:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:30,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:30,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244015351] [2022-07-13 15:37:30,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244015351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:30,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615780784] [2022-07-13 15:37:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:37:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:30,345 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:30,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-13 15:37:30,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2022-07-13 15:37:30,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-13 15:37:30,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:30,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:30,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615780784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:30,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:30,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2022-07-13 15:37:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601303332] [2022-07-13 15:37:30,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:30,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 15:37:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 15:37:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 15:37:30,874 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:31,332 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-07-13 15:37:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 15:37:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-07-13 15:37:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:31,336 INFO L225 Difference]: With dead ends: 212 [2022-07-13 15:37:31,336 INFO L226 Difference]: Without dead ends: 210 [2022-07-13 15:37:31,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 15:37:31,337 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 247 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:31,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 283 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:37:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-13 15:37:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-07-13 15:37:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-07-13 15:37:31,355 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 194 [2022-07-13 15:37:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:31,356 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-07-13 15:37:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-07-13 15:37:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-13 15:37:31,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:31,357 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:31,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:31,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-13 15:37:31,574 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash -951388173, now seen corresponding path program 37 times [2022-07-13 15:37:31,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:31,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919136234] [2022-07-13 15:37:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919136234] [2022-07-13 15:37:32,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919136234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907397386] [2022-07-13 15:37:32,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:37:32,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:32,374 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:32,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-13 15:37:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 15:37:32,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:37:33,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:37:33,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907397386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:33,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:33,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 101 [2022-07-13 15:37:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326436091] [2022-07-13 15:37:33,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-13 15:37:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-13 15:37:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=7819, Unknown=0, NotChecked=0, Total=10100 [2022-07-13 15:37:33,529 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:34,562 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2022-07-13 15:37:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 15:37:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2022-07-13 15:37:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:34,564 INFO L225 Difference]: With dead ends: 466 [2022-07-13 15:37:34,564 INFO L226 Difference]: Without dead ends: 333 [2022-07-13 15:37:34,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3907 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4395, Invalid=13161, Unknown=0, NotChecked=0, Total=17556 [2022-07-13 15:37:34,565 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 477 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:34,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 858 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:37:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-13 15:37:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 205. [2022-07-13 15:37:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-07-13 15:37:34,581 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 202 [2022-07-13 15:37:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:34,581 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-07-13 15:37:34,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-07-13 15:37:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-13 15:37:34,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:34,583 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:34,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-13 15:37:34,799 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1744337320, now seen corresponding path program 38 times [2022-07-13 15:37:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647383016] [2022-07-13 15:37:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 1955 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647383016] [2022-07-13 15:37:35,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647383016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142731295] [2022-07-13 15:37:35,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:37:35,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:35,750 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:35,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-13 15:37:35,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:37:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-13 15:37:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:37,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142731295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:37,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:37,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 103 [2022-07-13 15:37:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219587124] [2022-07-13 15:37:37,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:37,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-13 15:37:37,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-13 15:37:37,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2383, Invalid=8123, Unknown=0, NotChecked=0, Total=10506 [2022-07-13 15:37:37,623 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:38,666 INFO L93 Difference]: Finished difference Result 474 states and 544 transitions. [2022-07-13 15:37:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-13 15:37:38,666 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2022-07-13 15:37:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:38,667 INFO L225 Difference]: With dead ends: 474 [2022-07-13 15:37:38,667 INFO L226 Difference]: Without dead ends: 339 [2022-07-13 15:37:38,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4629, Invalid=13731, Unknown=0, NotChecked=0, Total=18360 [2022-07-13 15:37:38,669 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 568 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:38,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 705 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 15:37:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-13 15:37:38,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 207. [2022-07-13 15:37:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-07-13 15:37:38,685 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 204 [2022-07-13 15:37:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:38,686 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-07-13 15:37:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-07-13 15:37:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-13 15:37:38,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:38,687 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:38,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:38,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-13 15:37:38,904 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash 735711101, now seen corresponding path program 39 times [2022-07-13 15:37:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970631542] [2022-07-13 15:37:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1056 proven. 2114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:39,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:39,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970631542] [2022-07-13 15:37:39,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970631542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:39,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616276931] [2022-07-13 15:37:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:37:39,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:39,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:39,445 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:39,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-13 15:37:39,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-07-13 15:37:39,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-13 15:37:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:39,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:39,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616276931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:39,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:39,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2022-07-13 15:37:39,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699052945] [2022-07-13 15:37:39,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:39,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 15:37:39,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:39,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 15:37:39,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=885, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 15:37:39,958 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:40,392 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-07-13 15:37:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-13 15:37:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-13 15:37:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:40,393 INFO L225 Difference]: With dead ends: 224 [2022-07-13 15:37:40,393 INFO L226 Difference]: Without dead ends: 222 [2022-07-13 15:37:40,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2022-07-13 15:37:40,394 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:40,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 332 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:37:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-13 15:37:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-07-13 15:37:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-07-13 15:37:40,413 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 206 [2022-07-13 15:37:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-07-13 15:37:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-07-13 15:37:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-13 15:37:40,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:40,414 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:40,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-13 15:37:40,631 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1013869469, now seen corresponding path program 40 times [2022-07-13 15:37:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046318110] [2022-07-13 15:37:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2213 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:41,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046318110] [2022-07-13 15:37:41,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046318110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120287947] [2022-07-13 15:37:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:37:41,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:41,638 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:41,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-13 15:37:41,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:37:41,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-13 15:37:41,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:43,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:43,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120287947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:43,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:43,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 110 [2022-07-13 15:37:43,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950861041] [2022-07-13 15:37:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:43,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-07-13 15:37:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-07-13 15:37:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2740, Invalid=9250, Unknown=0, NotChecked=0, Total=11990 [2022-07-13 15:37:43,530 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:44,880 INFO L93 Difference]: Finished difference Result 637 states and 712 transitions. [2022-07-13 15:37:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-13 15:37:44,880 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-07-13 15:37:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:44,881 INFO L225 Difference]: With dead ends: 637 [2022-07-13 15:37:44,881 INFO L226 Difference]: Without dead ends: 359 [2022-07-13 15:37:44,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7709 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7744, Invalid=24118, Unknown=0, NotChecked=0, Total=31862 [2022-07-13 15:37:44,893 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 652 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:44,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 968 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:37:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-13 15:37:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 219. [2022-07-13 15:37:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-07-13 15:37:44,929 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 214 [2022-07-13 15:37:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:44,930 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-07-13 15:37:44,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-07-13 15:37:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-13 15:37:44,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:44,931 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:44,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-13 15:37:45,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-13 15:37:45,144 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 567782637, now seen corresponding path program 41 times [2022-07-13 15:37:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:45,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309320567] [2022-07-13 15:37:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1190 proven. 2382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309320567] [2022-07-13 15:37:45,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309320567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997554628] [2022-07-13 15:37:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:37:45,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:45,712 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:45,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-13 15:37:45,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-07-13 15:37:45,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-13 15:37:45,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:46,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:46,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997554628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:46,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:46,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2022-07-13 15:37:46,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825566631] [2022-07-13 15:37:46,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:46,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-13 15:37:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-13 15:37:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=972, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 15:37:46,255 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:46,694 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-07-13 15:37:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-13 15:37:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-13 15:37:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:46,695 INFO L225 Difference]: With dead ends: 236 [2022-07-13 15:37:46,695 INFO L226 Difference]: Without dead ends: 234 [2022-07-13 15:37:46,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 466 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2308, Invalid=4012, Unknown=0, NotChecked=0, Total=6320 [2022-07-13 15:37:46,696 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 271 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:46,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 312 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:37:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-13 15:37:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2022-07-13 15:37:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-07-13 15:37:46,716 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 218 [2022-07-13 15:37:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:46,716 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-07-13 15:37:46,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-07-13 15:37:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-13 15:37:46,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:46,717 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:46,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:46,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:46,935 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1116914131, now seen corresponding path program 42 times [2022-07-13 15:37:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809323869] [2022-07-13 15:37:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2487 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:48,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809323869] [2022-07-13 15:37:48,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809323869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292501876] [2022-07-13 15:37:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:37:48,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:48,323 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:48,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-13 15:37:48,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-07-13 15:37:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:48,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-13 15:37:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:50,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:50,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292501876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:50,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:50,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 116 [2022-07-13 15:37:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328081520] [2022-07-13 15:37:50,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:50,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-13 15:37:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-13 15:37:50,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3044, Invalid=10296, Unknown=0, NotChecked=0, Total=13340 [2022-07-13 15:37:50,373 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:51,848 INFO L93 Difference]: Finished difference Result 673 states and 752 transitions. [2022-07-13 15:37:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-07-13 15:37:51,848 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2022-07-13 15:37:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:51,850 INFO L225 Difference]: With dead ends: 673 [2022-07-13 15:37:51,850 INFO L226 Difference]: Without dead ends: 379 [2022-07-13 15:37:51,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8595 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8630, Invalid=26902, Unknown=0, NotChecked=0, Total=35532 [2022-07-13 15:37:51,851 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 643 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:51,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1119 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 15:37:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-13 15:37:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 231. [2022-07-13 15:37:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-07-13 15:37:51,873 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 226 [2022-07-13 15:37:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:51,873 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-07-13 15:37:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-07-13 15:37:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-13 15:37:51,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:51,874 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:51,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-13 15:37:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:52,091 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1125538653, now seen corresponding path program 43 times [2022-07-13 15:37:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:52,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092761692] [2022-07-13 15:37:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1332 proven. 2666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:52,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:52,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092761692] [2022-07-13 15:37:52,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092761692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:52,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420944284] [2022-07-13 15:37:52,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:37:52,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:52,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:52,679 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:52,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-13 15:37:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-13 15:37:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:53,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:53,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420944284] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:53,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:53,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2022-07-13 15:37:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514811066] [2022-07-13 15:37:53,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:53,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 15:37:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 15:37:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1063, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 15:37:53,256 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:53,870 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-07-13 15:37:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-13 15:37:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-07-13 15:37:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:53,871 INFO L225 Difference]: With dead ends: 248 [2022-07-13 15:37:53,871 INFO L226 Difference]: Without dead ends: 246 [2022-07-13 15:37:53,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2549, Invalid=4423, Unknown=0, NotChecked=0, Total=6972 [2022-07-13 15:37:53,872 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 205 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:53,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 395 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:37:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-13 15:37:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2022-07-13 15:37:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2022-07-13 15:37:53,893 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 230 [2022-07-13 15:37:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:53,894 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2022-07-13 15:37:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2022-07-13 15:37:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-13 15:37:53,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:53,895 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:53,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-13 15:37:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-13 15:37:54,112 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1489764285, now seen corresponding path program 44 times [2022-07-13 15:37:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:54,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933146834] [2022-07-13 15:37:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:37:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2777 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:37:55,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:37:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933146834] [2022-07-13 15:37:55,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933146834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:37:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742925966] [2022-07-13 15:37:55,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:37:55,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:37:55,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:37:55,732 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:37:55,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-13 15:37:55,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:37:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:37:55,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-13 15:37:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:37:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:37:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:37:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:37:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742925966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:37:58,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:37:58,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 119 [2022-07-13 15:37:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563553570] [2022-07-13 15:37:58,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:37:58,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-07-13 15:37:58,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:37:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-07-13 15:37:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=10879, Unknown=0, NotChecked=0, Total=14042 [2022-07-13 15:37:58,136 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:37:59,620 INFO L93 Difference]: Finished difference Result 550 states and 630 transitions. [2022-07-13 15:37:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-13 15:37:59,621 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2022-07-13 15:37:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:37:59,622 INFO L225 Difference]: With dead ends: 550 [2022-07-13 15:37:59,622 INFO L226 Difference]: Without dead ends: 393 [2022-07-13 15:37:59,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6129, Invalid=18363, Unknown=0, NotChecked=0, Total=24492 [2022-07-13 15:37:59,624 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 597 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:37:59,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 921 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:37:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-13 15:37:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 241. [2022-07-13 15:37:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2022-07-13 15:37:59,674 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 238 [2022-07-13 15:37:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:37:59,674 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2022-07-13 15:37:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:37:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2022-07-13 15:37:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-13 15:37:59,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:37:59,676 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:37:59,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-13 15:37:59,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-13 15:37:59,890 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:37:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:37:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1569193944, now seen corresponding path program 45 times [2022-07-13 15:37:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:37:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642823816] [2022-07-13 15:37:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:37:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:37:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2777 proven. 1593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642823816] [2022-07-13 15:38:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642823816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846536960] [2022-07-13 15:38:01,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:38:01,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:01,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:01,058 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:01,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-13 15:38:01,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2022-07-13 15:38:01,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-13 15:38:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:02,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:03,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846536960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:03,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:03,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 121 [2022-07-13 15:38:03,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003714693] [2022-07-13 15:38:03,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:03,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-07-13 15:38:03,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-07-13 15:38:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=11237, Unknown=0, NotChecked=0, Total=14520 [2022-07-13 15:38:03,046 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:04,178 INFO L93 Difference]: Finished difference Result 558 states and 640 transitions. [2022-07-13 15:38:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-13 15:38:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-07-13 15:38:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:04,180 INFO L225 Difference]: With dead ends: 558 [2022-07-13 15:38:04,180 INFO L226 Difference]: Without dead ends: 399 [2022-07-13 15:38:04,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5603 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6405, Invalid=19035, Unknown=0, NotChecked=0, Total=25440 [2022-07-13 15:38:04,182 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 535 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:04,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 983 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:38:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-13 15:38:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 243. [2022-07-13 15:38:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-07-13 15:38:04,204 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 240 [2022-07-13 15:38:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:04,204 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-07-13 15:38:04,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-07-13 15:38:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-13 15:38:04,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:04,205 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:04,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-13 15:38:04,423 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -591684915, now seen corresponding path program 46 times [2022-07-13 15:38:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:04,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120625983] [2022-07-13 15:38:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1482 proven. 2966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120625983] [2022-07-13 15:38:05,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120625983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020062573] [2022-07-13 15:38:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:38:05,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:05,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:05,071 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:05,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-13 15:38:05,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:38:05,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-13 15:38:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:05,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:05,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020062573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:05,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:05,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2022-07-13 15:38:05,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814682177] [2022-07-13 15:38:05,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:05,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 15:38:05,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:05,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 15:38:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1158, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 15:38:05,475 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:05,935 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2022-07-13 15:38:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-13 15:38:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-07-13 15:38:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:05,937 INFO L225 Difference]: With dead ends: 260 [2022-07-13 15:38:05,937 INFO L226 Difference]: Without dead ends: 258 [2022-07-13 15:38:05,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2022-07-13 15:38:05,938 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 305 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:05,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 391 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-13 15:38:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2022-07-13 15:38:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-07-13 15:38:05,967 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 242 [2022-07-13 15:38:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:05,967 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-07-13 15:38:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-07-13 15:38:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-13 15:38:05,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:05,968 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:05,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:06,186 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2128949325, now seen corresponding path program 47 times [2022-07-13 15:38:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:06,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477882566] [2022-07-13 15:38:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3083 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477882566] [2022-07-13 15:38:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477882566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018159543] [2022-07-13 15:38:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:38:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:07,284 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:07,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-13 15:38:07,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2022-07-13 15:38:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:07,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-13 15:38:07,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:08,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:09,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018159543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:09,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:09,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 128 [2022-07-13 15:38:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48041136] [2022-07-13 15:38:09,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-13 15:38:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-13 15:38:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3700, Invalid=12556, Unknown=0, NotChecked=0, Total=16256 [2022-07-13 15:38:09,085 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:10,982 INFO L93 Difference]: Finished difference Result 745 states and 832 transitions. [2022-07-13 15:38:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-13 15:38:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-07-13 15:38:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:10,984 INFO L225 Difference]: With dead ends: 745 [2022-07-13 15:38:10,984 INFO L226 Difference]: Without dead ends: 419 [2022-07-13 15:38:10,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10511 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10546, Invalid=32926, Unknown=0, NotChecked=0, Total=43472 [2022-07-13 15:38:10,988 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 900 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:10,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1232 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 15:38:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-13 15:38:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 255. [2022-07-13 15:38:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-07-13 15:38:11,011 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 250 [2022-07-13 15:38:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:11,012 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-07-13 15:38:11,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-07-13 15:38:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-13 15:38:11,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:11,013 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:11,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:11,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-13 15:38:11,221 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash 145550141, now seen corresponding path program 48 times [2022-07-13 15:38:11,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:11,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927060229] [2022-07-13 15:38:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:11,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1640 proven. 3282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927060229] [2022-07-13 15:38:12,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927060229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402786054] [2022-07-13 15:38:12,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:38:12,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:12,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:12,017 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:12,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-13 15:38:12,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-07-13 15:38:12,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-13 15:38:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:12,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:12,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402786054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:12,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:12,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2022-07-13 15:38:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436391276] [2022-07-13 15:38:12,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:12,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 15:38:12,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:12,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 15:38:12,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1257, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 15:38:12,512 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:13,084 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-07-13 15:38:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-13 15:38:13,085 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-07-13 15:38:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:13,087 INFO L225 Difference]: With dead ends: 272 [2022-07-13 15:38:13,087 INFO L226 Difference]: Without dead ends: 270 [2022-07-13 15:38:13,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 544 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3067, Invalid=5305, Unknown=0, NotChecked=0, Total=8372 [2022-07-13 15:38:13,090 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 192 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:13,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 410 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:38:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-13 15:38:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2022-07-13 15:38:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2022-07-13 15:38:13,133 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 254 [2022-07-13 15:38:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:13,133 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2022-07-13 15:38:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2022-07-13 15:38:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-07-13 15:38:13,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:13,148 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:13,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-13 15:38:13,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:13,379 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:13,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:13,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1823256611, now seen corresponding path program 49 times [2022-07-13 15:38:13,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:13,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902091944] [2022-07-13 15:38:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:13,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3405 proven. 1845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:14,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:14,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902091944] [2022-07-13 15:38:14,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902091944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:14,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070173931] [2022-07-13 15:38:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:38:14,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:14,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:14,984 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:14,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-13 15:38:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:15,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-13 15:38:15,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:38:17,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:38:17,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070173931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:17,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:17,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 131 [2022-07-13 15:38:17,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885775936] [2022-07-13 15:38:17,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-13 15:38:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-13 15:38:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3831, Invalid=13199, Unknown=0, NotChecked=0, Total=17030 [2022-07-13 15:38:17,215 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:18,402 INFO L93 Difference]: Finished difference Result 606 states and 694 transitions. [2022-07-13 15:38:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-13 15:38:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2022-07-13 15:38:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:18,404 INFO L225 Difference]: With dead ends: 606 [2022-07-13 15:38:18,404 INFO L226 Difference]: Without dead ends: 433 [2022-07-13 15:38:18,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7445, Invalid=22311, Unknown=0, NotChecked=0, Total=29756 [2022-07-13 15:38:18,407 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 613 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:18,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1097 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:38:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-07-13 15:38:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 265. [2022-07-13 15:38:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-07-13 15:38:18,482 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 262 [2022-07-13 15:38:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:18,483 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-07-13 15:38:18,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-07-13 15:38:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-13 15:38:18,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:18,495 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:18,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:18,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-13 15:38:18,712 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -354905848, now seen corresponding path program 50 times [2022-07-13 15:38:18,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209561102] [2022-07-13 15:38:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3405 proven. 1929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:20,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209561102] [2022-07-13 15:38:20,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209561102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:20,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141465452] [2022-07-13 15:38:20,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:38:20,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:20,216 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:20,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-13 15:38:20,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:38:20,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-13 15:38:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:22,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:22,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141465452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:22,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:22,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 46, 46] total 132 [2022-07-13 15:38:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369275251] [2022-07-13 15:38:22,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:22,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-07-13 15:38:22,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-07-13 15:38:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=14364, Unknown=0, NotChecked=0, Total=17292 [2022-07-13 15:38:22,286 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:26,033 INFO L93 Difference]: Finished difference Result 621 states and 712 transitions. [2022-07-13 15:38:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-07-13 15:38:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2022-07-13 15:38:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:26,035 INFO L225 Difference]: With dead ends: 621 [2022-07-13 15:38:26,035 INFO L226 Difference]: Without dead ends: 446 [2022-07-13 15:38:26,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31476 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=14626, Invalid=77486, Unknown=0, NotChecked=0, Total=92112 [2022-07-13 15:38:26,039 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1156 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 2751 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 2751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:26,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 725 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 2751 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 15:38:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-13 15:38:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 271. [2022-07-13 15:38:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-07-13 15:38:26,078 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 264 [2022-07-13 15:38:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:26,078 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-07-13 15:38:26,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-07-13 15:38:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-13 15:38:26,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:26,080 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:26,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:26,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-13 15:38:26,293 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:26,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2068373472, now seen corresponding path program 51 times [2022-07-13 15:38:26,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:26,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244068264] [2022-07-13 15:38:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3572 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244068264] [2022-07-13 15:38:28,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244068264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922501728] [2022-07-13 15:38:28,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:38:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:28,014 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:28,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-13 15:38:28,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2022-07-13 15:38:28,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-13 15:38:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 1892 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:29,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 1892 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:29,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922501728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:29,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:29,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 47, 47] total 135 [2022-07-13 15:38:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661816535] [2022-07-13 15:38:29,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-07-13 15:38:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-07-13 15:38:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3062, Invalid=15028, Unknown=0, NotChecked=0, Total=18090 [2022-07-13 15:38:29,741 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 135 states, 135 states have (on average 3.9851851851851854) internal successors, (538), 135 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:33,123 INFO L93 Difference]: Finished difference Result 635 states and 728 transitions. [2022-07-13 15:38:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-07-13 15:38:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.9851851851851854) internal successors, (538), 135 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-07-13 15:38:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:33,125 INFO L225 Difference]: With dead ends: 635 [2022-07-13 15:38:33,125 INFO L226 Difference]: Without dead ends: 456 [2022-07-13 15:38:33,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32978 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15296, Invalid=81114, Unknown=0, NotChecked=0, Total=96410 [2022-07-13 15:38:33,131 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1107 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:33,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 726 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 2859 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 15:38:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-13 15:38:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 277. [2022-07-13 15:38:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2022-07-13 15:38:33,164 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 270 [2022-07-13 15:38:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:33,164 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2022-07-13 15:38:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.9851851851851854) internal successors, (538), 135 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2022-07-13 15:38:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-07-13 15:38:33,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:33,165 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:33,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:33,380 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1986014472, now seen corresponding path program 52 times [2022-07-13 15:38:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:33,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155465357] [2022-07-13 15:38:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 3743 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:34,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155465357] [2022-07-13 15:38:34,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155465357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:34,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952914254] [2022-07-13 15:38:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:38:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:34,651 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-13 15:38:34,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:38:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:34,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-13 15:38:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 1980 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:36,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 1980 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:36,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952914254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:36,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:36,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 48, 48] total 138 [2022-07-13 15:38:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40071603] [2022-07-13 15:38:36,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-07-13 15:38:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-07-13 15:38:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3199, Invalid=15707, Unknown=0, NotChecked=0, Total=18906 [2022-07-13 15:38:36,382 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand has 138 states, 138 states have (on average 3.9855072463768115) internal successors, (550), 138 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:40,220 INFO L93 Difference]: Finished difference Result 649 states and 744 transitions. [2022-07-13 15:38:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-07-13 15:38:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 3.9855072463768115) internal successors, (550), 138 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2022-07-13 15:38:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:40,222 INFO L225 Difference]: With dead ends: 649 [2022-07-13 15:38:40,222 INFO L226 Difference]: Without dead ends: 466 [2022-07-13 15:38:40,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 550 SyntacticMatches, 1 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34515 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15981, Invalid=84825, Unknown=0, NotChecked=0, Total=100806 [2022-07-13 15:38:40,229 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1164 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:40,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 728 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 15:38:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-13 15:38:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 283. [2022-07-13 15:38:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 282 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2022-07-13 15:38:40,282 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 276 [2022-07-13 15:38:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:40,282 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2022-07-13 15:38:40,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 3.9855072463768115) internal successors, (550), 138 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2022-07-13 15:38:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-07-13 15:38:40,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:40,283 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:40,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-13 15:38:40,501 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1067181488, now seen corresponding path program 53 times [2022-07-13 15:38:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:40,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167066018] [2022-07-13 15:38:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 3918 proven. 2202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167066018] [2022-07-13 15:38:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167066018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015104675] [2022-07-13 15:38:42,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:38:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:42,645 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:42,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-13 15:38:42,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-07-13 15:38:42,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-13 15:38:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 4050 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:45,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 4050 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015104675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:45,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 142 [2022-07-13 15:38:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660374548] [2022-07-13 15:38:45,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:45,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-07-13 15:38:45,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-07-13 15:38:45,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4515, Invalid=15507, Unknown=0, NotChecked=0, Total=20022 [2022-07-13 15:38:45,592 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand has 142 states, 142 states have (on average 3.3098591549295775) internal successors, (470), 142 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:47,292 INFO L93 Difference]: Finished difference Result 656 states and 752 transitions. [2022-07-13 15:38:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-13 15:38:47,292 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.3098591549295775) internal successors, (470), 142 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2022-07-13 15:38:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:47,294 INFO L225 Difference]: With dead ends: 656 [2022-07-13 15:38:47,294 INFO L226 Difference]: Without dead ends: 469 [2022-07-13 15:38:47,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7738 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8841, Invalid=26315, Unknown=0, NotChecked=0, Total=35156 [2022-07-13 15:38:47,297 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 748 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:47,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 1171 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:38:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-13 15:38:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 285. [2022-07-13 15:38:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-07-13 15:38:47,381 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 282 [2022-07-13 15:38:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:47,381 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-07-13 15:38:47,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.3098591549295775) internal successors, (470), 142 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-07-13 15:38:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-07-13 15:38:47,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:47,383 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:47,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:47,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-13 15:38:47,600 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1766615371, now seen corresponding path program 54 times [2022-07-13 15:38:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:47,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656832413] [2022-07-13 15:38:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2070 proven. 4142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656832413] [2022-07-13 15:38:48,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656832413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885540793] [2022-07-13 15:38:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:38:48,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:48,187 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:48,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-13 15:38:48,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-07-13 15:38:48,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-13 15:38:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:48,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885540793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:48,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:48,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 53 [2022-07-13 15:38:48,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179268328] [2022-07-13 15:38:48,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:48,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 15:38:48,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 15:38:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=1522, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 15:38:48,739 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:49,294 INFO L93 Difference]: Finished difference Result 302 states and 306 transitions. [2022-07-13 15:38:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-13 15:38:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2022-07-13 15:38:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:49,296 INFO L225 Difference]: With dead ends: 302 [2022-07-13 15:38:49,296 INFO L226 Difference]: Without dead ends: 300 [2022-07-13 15:38:49,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 609 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3782, Invalid=6520, Unknown=0, NotChecked=0, Total=10302 [2022-07-13 15:38:49,298 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 258 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:49,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 431 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-13 15:38:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 293. [2022-07-13 15:38:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0136986301369864) internal successors, (296), 292 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2022-07-13 15:38:49,329 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 284 [2022-07-13 15:38:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:49,329 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2022-07-13 15:38:49,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2022-07-13 15:38:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-13 15:38:49,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:49,331 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:49,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:49,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:49,549 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash -890477669, now seen corresponding path program 55 times [2022-07-13 15:38:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:49,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123472695] [2022-07-13 15:38:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:49,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4280 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:50,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123472695] [2022-07-13 15:38:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123472695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094357869] [2022-07-13 15:38:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:38:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:50,981 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:50,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-13 15:38:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-13 15:38:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:38:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:38:53,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094357869] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:53,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:53,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 146 [2022-07-13 15:38:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568182890] [2022-07-13 15:38:53,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:53,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-13 15:38:53,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-13 15:38:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4756, Invalid=16414, Unknown=0, NotChecked=0, Total=21170 [2022-07-13 15:38:53,360 INFO L87 Difference]: Start difference. First operand 293 states and 296 transitions. Second operand has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:55,064 INFO L93 Difference]: Finished difference Result 676 states and 774 transitions. [2022-07-13 15:38:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-13 15:38:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2022-07-13 15:38:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:55,066 INFO L225 Difference]: With dead ends: 676 [2022-07-13 15:38:55,066 INFO L226 Difference]: Without dead ends: 483 [2022-07-13 15:38:55,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8212 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9270, Invalid=27786, Unknown=0, NotChecked=0, Total=37056 [2022-07-13 15:38:55,068 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 791 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:55,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1060 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 15:38:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-07-13 15:38:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 295. [2022-07-13 15:38:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 298 transitions. [2022-07-13 15:38:55,099 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 298 transitions. Word has length 292 [2022-07-13 15:38:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:55,100 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 298 transitions. [2022-07-13 15:38:55,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 298 transitions. [2022-07-13 15:38:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-13 15:38:55,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:55,101 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:55,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:55,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:55,318 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash -817142336, now seen corresponding path program 56 times [2022-07-13 15:38:55,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672930333] [2022-07-13 15:38:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:55,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4280 proven. 2394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:57,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672930333] [2022-07-13 15:38:57,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672930333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074828294] [2022-07-13 15:38:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:38:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:57,694 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:57,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-13 15:38:57,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:38:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-13 15:38:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 2256 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:59,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 2256 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:59,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074828294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:59,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:59,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 51, 51] total 147 [2022-07-13 15:38:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647099312] [2022-07-13 15:38:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-07-13 15:38:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-07-13 15:38:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3628, Invalid=17834, Unknown=0, NotChecked=0, Total=21462 [2022-07-13 15:38:59,860 INFO L87 Difference]: Start difference. First operand 295 states and 298 transitions. Second operand has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:04,157 INFO L93 Difference]: Finished difference Result 691 states and 792 transitions. [2022-07-13 15:39:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-07-13 15:39:04,158 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-07-13 15:39:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:04,159 INFO L225 Difference]: With dead ends: 691 [2022-07-13 15:39:04,159 INFO L226 Difference]: Without dead ends: 496 [2022-07-13 15:39:04,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39336 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=18126, Invalid=96456, Unknown=0, NotChecked=0, Total=114582 [2022-07-13 15:39:04,166 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1311 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 797 Invalid, 4407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 15:39:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-13 15:39:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 301. [2022-07-13 15:39:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2022-07-13 15:39:04,232 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 294 [2022-07-13 15:39:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:04,232 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2022-07-13 15:39:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2022-07-13 15:39:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-13 15:39:04,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:04,234 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:04,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:04,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:04,451 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1199032792, now seen corresponding path program 57 times [2022-07-13 15:39:04,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:04,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76538488] [2022-07-13 15:39:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:04,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4467 proven. 2493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:05,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76538488] [2022-07-13 15:39:05,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76538488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:05,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584772803] [2022-07-13 15:39:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:39:05,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:05,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:05,975 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:06,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-13 15:39:06,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2022-07-13 15:39:06,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:06,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-13 15:39:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:08,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:08,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584772803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:08,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:08,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 151 [2022-07-13 15:39:08,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023449479] [2022-07-13 15:39:08,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:08,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-07-13 15:39:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-07-13 15:39:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5103, Invalid=17547, Unknown=0, NotChecked=0, Total=22650 [2022-07-13 15:39:08,430 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:10,725 INFO L93 Difference]: Finished difference Result 698 states and 800 transitions. [2022-07-13 15:39:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-13 15:39:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2022-07-13 15:39:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:10,727 INFO L225 Difference]: With dead ends: 698 [2022-07-13 15:39:10,727 INFO L226 Difference]: Without dead ends: 499 [2022-07-13 15:39:10,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8758 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10005, Invalid=29795, Unknown=0, NotChecked=0, Total=39800 [2022-07-13 15:39:10,731 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 845 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:10,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 1200 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 15:39:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-13 15:39:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 303. [2022-07-13 15:39:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.0132450331125828) internal successors, (306), 302 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2022-07-13 15:39:10,765 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 300 [2022-07-13 15:39:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:10,765 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2022-07-13 15:39:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2022-07-13 15:39:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-07-13 15:39:10,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:10,766 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:10,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:10,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-13 15:39:10,983 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1939396349, now seen corresponding path program 58 times [2022-07-13 15:39:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:10,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783584692] [2022-07-13 15:39:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:10,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2352 proven. 4706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:11,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783584692] [2022-07-13 15:39:11,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783584692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:11,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311494924] [2022-07-13 15:39:11,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:39:11,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:11,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:11,620 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:11,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-13 15:39:11,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:39:11,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-13 15:39:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:12,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311494924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:12,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:12,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2022-07-13 15:39:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272878481] [2022-07-13 15:39:12,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:12,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 15:39:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 15:39:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 15:39:12,305 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:12,983 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2022-07-13 15:39:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-13 15:39:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2022-07-13 15:39:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:12,989 INFO L225 Difference]: With dead ends: 320 [2022-07-13 15:39:12,989 INFO L226 Difference]: Without dead ends: 318 [2022-07-13 15:39:12,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 648 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4247, Invalid=7309, Unknown=0, NotChecked=0, Total=11556 [2022-07-13 15:39:12,991 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 314 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:12,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 461 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:39:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-13 15:39:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2022-07-13 15:39:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 314 transitions. [2022-07-13 15:39:13,026 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 314 transitions. Word has length 302 [2022-07-13 15:39:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:13,026 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 314 transitions. [2022-07-13 15:39:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 314 transitions. [2022-07-13 15:39:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-07-13 15:39:13,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:13,028 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:13,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-13 15:39:13,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-13 15:39:13,243 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1043276829, now seen corresponding path program 59 times [2022-07-13 15:39:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:13,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164118712] [2022-07-13 15:39:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 4853 proven. 2597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:15,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164118712] [2022-07-13 15:39:15,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164118712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487132805] [2022-07-13 15:39:15,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:39:15,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:15,894 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:15,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-13 15:39:16,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2022-07-13 15:39:16,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-13 15:39:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:19,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:20,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487132805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:20,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:20,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 158 [2022-07-13 15:39:20,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132754761] [2022-07-13 15:39:20,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:20,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-07-13 15:39:20,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-07-13 15:39:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5620, Invalid=19186, Unknown=0, NotChecked=0, Total=24806 [2022-07-13 15:39:20,110 INFO L87 Difference]: Start difference. First operand 311 states and 314 transitions. Second operand has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:24,271 INFO L93 Difference]: Finished difference Result 925 states and 1032 transitions. [2022-07-13 15:39:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-07-13 15:39:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2022-07-13 15:39:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:24,273 INFO L225 Difference]: With dead ends: 925 [2022-07-13 15:39:24,273 INFO L226 Difference]: Without dead ends: 519 [2022-07-13 15:39:24,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16141 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=16176, Invalid=50646, Unknown=0, NotChecked=0, Total=66822 [2022-07-13 15:39:24,277 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1007 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:24,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1305 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 15:39:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-07-13 15:39:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 315. [2022-07-13 15:39:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0127388535031847) internal successors, (318), 314 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-07-13 15:39:24,313 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 310 [2022-07-13 15:39:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:24,313 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-07-13 15:39:24,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-07-13 15:39:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-13 15:39:24,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:24,314 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:24,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:24,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-07-13 15:39:24,532 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1035533421, now seen corresponding path program 60 times [2022-07-13 15:39:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:24,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443175716] [2022-07-13 15:39:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2550 proven. 5102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:25,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443175716] [2022-07-13 15:39:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443175716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031277634] [2022-07-13 15:39:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:39:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:25,579 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:25,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-13 15:39:25,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-07-13 15:39:25,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:25,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-13 15:39:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:26,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:26,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031277634] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:26,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:26,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2022-07-13 15:39:26,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247933429] [2022-07-13 15:39:26,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:26,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 15:39:26,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 15:39:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1494, Invalid=1812, Unknown=0, NotChecked=0, Total=3306 [2022-07-13 15:39:26,217 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:26,845 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2022-07-13 15:39:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-13 15:39:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2022-07-13 15:39:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:26,846 INFO L225 Difference]: With dead ends: 332 [2022-07-13 15:39:26,847 INFO L226 Difference]: Without dead ends: 330 [2022-07-13 15:39:26,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 674 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4572, Invalid=7860, Unknown=0, NotChecked=0, Total=12432 [2022-07-13 15:39:26,848 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 330 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:26,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 446 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:39:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-13 15:39:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2022-07-13 15:39:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.0124223602484472) internal successors, (326), 322 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 326 transitions. [2022-07-13 15:39:26,885 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 326 transitions. Word has length 314 [2022-07-13 15:39:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:26,886 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 326 transitions. [2022-07-13 15:39:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 326 transitions. [2022-07-13 15:39:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-07-13 15:39:26,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:26,887 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:26,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:27,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:27,104 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash 770478419, now seen corresponding path program 61 times [2022-07-13 15:39:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947442348] [2022-07-13 15:39:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5255 proven. 2805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:29,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947442348] [2022-07-13 15:39:29,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947442348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693091418] [2022-07-13 15:39:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:39:29,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:29,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:29,215 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:29,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-13 15:39:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-13 15:39:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:39:31,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:39:31,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693091418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:31,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:31,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 161 [2022-07-13 15:39:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624726488] [2022-07-13 15:39:31,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:31,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-07-13 15:39:31,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-07-13 15:39:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5781, Invalid=19979, Unknown=0, NotChecked=0, Total=25760 [2022-07-13 15:39:31,938 INFO L87 Difference]: Start difference. First operand 323 states and 326 transitions. Second operand has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:34,129 INFO L93 Difference]: Finished difference Result 746 states and 854 transitions. [2022-07-13 15:39:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-13 15:39:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2022-07-13 15:39:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:34,132 INFO L225 Difference]: With dead ends: 746 [2022-07-13 15:39:34,132 INFO L226 Difference]: Without dead ends: 533 [2022-07-13 15:39:34,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9997 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11295, Invalid=33861, Unknown=0, NotChecked=0, Total=45156 [2022-07-13 15:39:34,139 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 819 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:34,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 1296 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:39:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-13 15:39:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 325. [2022-07-13 15:39:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0123456790123457) internal successors, (328), 324 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2022-07-13 15:39:34,184 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 322 [2022-07-13 15:39:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:34,184 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2022-07-13 15:39:34,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2022-07-13 15:39:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-13 15:39:34,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:34,185 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:34,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:34,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:34,391 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1497433272, now seen corresponding path program 62 times [2022-07-13 15:39:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040382905] [2022-07-13 15:39:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5255 proven. 2909 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040382905] [2022-07-13 15:39:36,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040382905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94074797] [2022-07-13 15:39:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:39:36,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:36,555 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:36,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-13 15:39:36,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:39:36,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:36,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-13 15:39:36,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 2756 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:39,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 2756 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:39,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94074797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:39,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:39,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 56, 56] total 162 [2022-07-13 15:39:39,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992345479] [2022-07-13 15:39:39,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:39,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-07-13 15:39:39,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-07-13 15:39:39,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4403, Invalid=21679, Unknown=0, NotChecked=0, Total=26082 [2022-07-13 15:39:39,708 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand has 162 states, 162 states have (on average 3.9876543209876543) internal successors, (646), 162 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:45,422 INFO L93 Difference]: Finished difference Result 761 states and 872 transitions. [2022-07-13 15:39:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-07-13 15:39:45,423 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 3.9876543209876543) internal successors, (646), 162 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2022-07-13 15:39:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:45,424 INFO L225 Difference]: With dead ends: 761 [2022-07-13 15:39:45,424 INFO L226 Difference]: Without dead ends: 546 [2022-07-13 15:39:45,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 646 SyntacticMatches, 1 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48071 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=22001, Invalid=117501, Unknown=0, NotChecked=0, Total=139502 [2022-07-13 15:39:45,434 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1430 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 3816 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 4806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 3816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:45,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 1074 Invalid, 4806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 3816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 15:39:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-07-13 15:39:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 331. [2022-07-13 15:39:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0121212121212122) internal successors, (334), 330 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 334 transitions. [2022-07-13 15:39:45,485 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 334 transitions. Word has length 324 [2022-07-13 15:39:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:45,485 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 334 transitions. [2022-07-13 15:39:45,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 3.9876543209876543) internal successors, (646), 162 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 334 transitions. [2022-07-13 15:39:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-07-13 15:39:45,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:45,486 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:45,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-13 15:39:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-13 15:39:45,689 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1006588400, now seen corresponding path program 63 times [2022-07-13 15:39:45,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:45,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557786153] [2022-07-13 15:39:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5462 proven. 3018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557786153] [2022-07-13 15:39:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557786153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536658550] [2022-07-13 15:39:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:39:47,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:47,913 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:47,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-13 15:39:48,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2022-07-13 15:39:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-13 15:39:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:51,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536658550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:51,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:51,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 166 [2022-07-13 15:39:51,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609348996] [2022-07-13 15:39:51,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:51,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-07-13 15:39:51,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:51,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-07-13 15:39:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6163, Invalid=21227, Unknown=0, NotChecked=0, Total=27390 [2022-07-13 15:39:51,386 INFO L87 Difference]: Start difference. First operand 331 states and 334 transitions. Second operand has 166 states, 166 states have (on average 3.3132530120481927) internal successors, (550), 166 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:53,841 INFO L93 Difference]: Finished difference Result 768 states and 880 transitions. [2022-07-13 15:39:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-13 15:39:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 3.3132530120481927) internal successors, (550), 166 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2022-07-13 15:39:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:53,843 INFO L225 Difference]: With dead ends: 768 [2022-07-13 15:39:53,843 INFO L226 Difference]: Without dead ends: 549 [2022-07-13 15:39:53,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12105, Invalid=36075, Unknown=0, NotChecked=0, Total=48180 [2022-07-13 15:39:53,847 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 928 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:53,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 1350 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:39:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-07-13 15:39:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 333. [2022-07-13 15:39:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.0120481927710843) internal successors, (336), 332 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 336 transitions. [2022-07-13 15:39:53,888 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 336 transitions. Word has length 330 [2022-07-13 15:39:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:53,889 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 336 transitions. [2022-07-13 15:39:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 3.3132530120481927) internal successors, (550), 166 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 336 transitions. [2022-07-13 15:39:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-07-13 15:39:53,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:53,890 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:53,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-13 15:39:54,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-13 15:39:54,095 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1741558667, now seen corresponding path program 64 times [2022-07-13 15:39:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053842300] [2022-07-13 15:39:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:54,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2862 proven. 5726 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:55,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053842300] [2022-07-13 15:39:55,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053842300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:55,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618869357] [2022-07-13 15:39:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:39:55,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:55,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:55,327 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:55,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-13 15:39:55,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:39:55,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:55,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-13 15:39:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:55,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:56,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618869357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:56,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 61 [2022-07-13 15:39:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508999276] [2022-07-13 15:39:56,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-13 15:39:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-13 15:39:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1662, Invalid=1998, Unknown=0, NotChecked=0, Total=3660 [2022-07-13 15:39:56,008 INFO L87 Difference]: Start difference. First operand 333 states and 336 transitions. Second operand has 61 states, 61 states have (on average 5.819672131147541) internal successors, (355), 61 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:56,722 INFO L93 Difference]: Finished difference Result 350 states and 354 transitions. [2022-07-13 15:39:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-13 15:39:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.819672131147541) internal successors, (355), 61 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2022-07-13 15:39:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:56,724 INFO L225 Difference]: With dead ends: 350 [2022-07-13 15:39:56,724 INFO L226 Difference]: Without dead ends: 348 [2022-07-13 15:39:56,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 713 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5082, Invalid=8724, Unknown=0, NotChecked=0, Total=13806 [2022-07-13 15:39:56,726 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 294 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:56,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 553 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:39:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-13 15:39:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2022-07-13 15:39:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.011764705882353) internal successors, (344), 340 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 344 transitions. [2022-07-13 15:39:56,768 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 344 transitions. Word has length 332 [2022-07-13 15:39:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:56,768 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 344 transitions. [2022-07-13 15:39:56,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.819672131147541) internal successors, (355), 61 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 344 transitions. [2022-07-13 15:39:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-07-13 15:39:56,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:56,770 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:56,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-13 15:39:56,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:56,988 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1519974747, now seen corresponding path program 65 times [2022-07-13 15:39:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831301661] [2022-07-13 15:39:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:56,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 5888 proven. 3132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831301661] [2022-07-13 15:39:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831301661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19290577] [2022-07-13 15:39:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:39:58,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:58,994 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:39:58,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-13 15:39:59,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2022-07-13 15:39:59,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:39:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-13 15:39:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6050 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:01,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6050 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:02,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19290577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:02,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:02,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 173 [2022-07-13 15:40:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920078646] [2022-07-13 15:40:02,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-07-13 15:40:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-07-13 15:40:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6730, Invalid=23026, Unknown=0, NotChecked=0, Total=29756 [2022-07-13 15:40:02,122 INFO L87 Difference]: Start difference. First operand 341 states and 344 transitions. Second operand has 173 states, 173 states have (on average 3.3352601156069364) internal successors, (577), 173 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:06,134 INFO L93 Difference]: Finished difference Result 1015 states and 1132 transitions. [2022-07-13 15:40:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-07-13 15:40:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 3.3352601156069364) internal successors, (577), 173 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2022-07-13 15:40:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:06,136 INFO L225 Difference]: With dead ends: 1015 [2022-07-13 15:40:06,136 INFO L226 Difference]: Without dead ends: 569 [2022-07-13 15:40:06,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19406 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=19441, Invalid=60931, Unknown=0, NotChecked=0, Total=80372 [2022-07-13 15:40:06,140 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1129 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:06,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1825 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 15:40:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-07-13 15:40:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 345. [2022-07-13 15:40:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0116279069767442) internal successors, (348), 344 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 348 transitions. [2022-07-13 15:40:06,190 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 348 transitions. Word has length 340 [2022-07-13 15:40:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:06,190 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 348 transitions. [2022-07-13 15:40:06,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 3.3352601156069364) internal successors, (577), 173 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 348 transitions. [2022-07-13 15:40:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-07-13 15:40:06,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:06,191 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:06,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-13 15:40:06,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-13 15:40:06,409 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1862601829, now seen corresponding path program 66 times [2022-07-13 15:40:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:06,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675276680] [2022-07-13 15:40:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3080 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:07,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675276680] [2022-07-13 15:40:07,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675276680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243538085] [2022-07-13 15:40:07,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:40:07,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:07,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:07,511 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:07,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-13 15:40:07,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-07-13 15:40:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:40:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-13 15:40:07,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:07,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243538085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:08,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:08,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 63 [2022-07-13 15:40:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447175285] [2022-07-13 15:40:08,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:08,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 15:40:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 15:40:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1779, Invalid=2127, Unknown=0, NotChecked=0, Total=3906 [2022-07-13 15:40:08,167 INFO L87 Difference]: Start difference. First operand 345 states and 348 transitions. Second operand has 63 states, 63 states have (on average 5.825396825396825) internal successors, (367), 63 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:08,934 INFO L93 Difference]: Finished difference Result 362 states and 366 transitions. [2022-07-13 15:40:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-07-13 15:40:08,935 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.825396825396825) internal successors, (367), 63 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2022-07-13 15:40:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:08,936 INFO L225 Difference]: With dead ends: 362 [2022-07-13 15:40:08,936 INFO L226 Difference]: Without dead ends: 360 [2022-07-13 15:40:08,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 739 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5437, Invalid=9325, Unknown=0, NotChecked=0, Total=14762 [2022-07-13 15:40:08,938 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 246 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:08,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 526 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:40:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-13 15:40:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 353. [2022-07-13 15:40:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0113636363636365) internal successors, (356), 352 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 356 transitions. [2022-07-13 15:40:08,983 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 356 transitions. Word has length 344 [2022-07-13 15:40:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:08,983 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 356 transitions. [2022-07-13 15:40:08,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.825396825396825) internal successors, (367), 63 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 356 transitions. [2022-07-13 15:40:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-07-13 15:40:08,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:08,985 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:09,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-13 15:40:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-13 15:40:09,203 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -133879477, now seen corresponding path program 67 times [2022-07-13 15:40:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793645773] [2022-07-13 15:40:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6330 proven. 3360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:12,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793645773] [2022-07-13 15:40:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793645773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580662762] [2022-07-13 15:40:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:40:12,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:12,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:12,260 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:12,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-13 15:40:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-13 15:40:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:40:15,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:40:15,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580662762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:15,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:15,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 176 [2022-07-13 15:40:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237555588] [2022-07-13 15:40:15,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:15,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-07-13 15:40:15,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-07-13 15:40:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6906, Invalid=23894, Unknown=0, NotChecked=0, Total=30800 [2022-07-13 15:40:15,315 INFO L87 Difference]: Start difference. First operand 353 states and 356 transitions. Second operand has 176 states, 176 states have (on average 3.340909090909091) internal successors, (588), 176 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:17,973 INFO L93 Difference]: Finished difference Result 816 states and 934 transitions. [2022-07-13 15:40:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-13 15:40:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 3.340909090909091) internal successors, (588), 176 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 352 [2022-07-13 15:40:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:17,975 INFO L225 Difference]: With dead ends: 816 [2022-07-13 15:40:17,975 INFO L226 Difference]: Without dead ends: 583 [2022-07-13 15:40:17,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11957 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13520, Invalid=40536, Unknown=0, NotChecked=0, Total=54056 [2022-07-13 15:40:17,979 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1222 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:17,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1463 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:40:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-07-13 15:40:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2022-07-13 15:40:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0112994350282485) internal successors, (358), 354 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 358 transitions. [2022-07-13 15:40:18,048 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 358 transitions. Word has length 352 [2022-07-13 15:40:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:18,048 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 358 transitions. [2022-07-13 15:40:18,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 3.340909090909091) internal successors, (588), 176 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 358 transitions. [2022-07-13 15:40:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-07-13 15:40:18,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:18,050 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:18,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-13 15:40:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-13 15:40:18,267 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1780833776, now seen corresponding path program 68 times [2022-07-13 15:40:18,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:18,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058739866] [2022-07-13 15:40:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:18,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6330 proven. 3474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:20,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:20,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058739866] [2022-07-13 15:40:20,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058739866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:20,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605914398] [2022-07-13 15:40:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:40:20,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:20,402 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:20,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-13 15:40:20,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:40:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:40:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-13 15:40:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:23,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:23,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605914398] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:23,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:23,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 178 [2022-07-13 15:40:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824143917] [2022-07-13 15:40:23,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2022-07-13 15:40:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2022-07-13 15:40:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7083, Invalid=24423, Unknown=0, NotChecked=0, Total=31506 [2022-07-13 15:40:23,570 INFO L87 Difference]: Start difference. First operand 355 states and 358 transitions. Second operand has 178 states, 178 states have (on average 3.3146067415730336) internal successors, (590), 178 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:26,325 INFO L93 Difference]: Finished difference Result 824 states and 944 transitions. [2022-07-13 15:40:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-07-13 15:40:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.3146067415730336) internal successors, (590), 178 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2022-07-13 15:40:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:26,327 INFO L225 Difference]: With dead ends: 824 [2022-07-13 15:40:26,327 INFO L226 Difference]: Without dead ends: 589 [2022-07-13 15:40:26,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12196 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13929, Invalid=41531, Unknown=0, NotChecked=0, Total=55460 [2022-07-13 15:40:26,330 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1044 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:26,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 1420 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:40:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-07-13 15:40:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 357. [2022-07-13 15:40:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.0112359550561798) internal successors, (360), 356 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 360 transitions. [2022-07-13 15:40:26,376 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 360 transitions. Word has length 354 [2022-07-13 15:40:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:26,376 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 360 transitions. [2022-07-13 15:40:26,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.3146067415730336) internal successors, (590), 178 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 360 transitions. [2022-07-13 15:40:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-07-13 15:40:26,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:26,377 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:26,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-13 15:40:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-07-13 15:40:26,591 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash -720700075, now seen corresponding path program 69 times [2022-07-13 15:40:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578445412] [2022-07-13 15:40:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3306 proven. 6614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:27,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578445412] [2022-07-13 15:40:27,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578445412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215090568] [2022-07-13 15:40:27,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:40:27,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:27,654 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:27,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-13 15:40:27,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2022-07-13 15:40:27,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:40:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 119 conjunts are in the unsatisfiable core [2022-07-13 15:40:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:28,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:28,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215090568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:28,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:28,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 65 [2022-07-13 15:40:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325553444] [2022-07-13 15:40:28,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:28,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 15:40:28,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 15:40:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=2260, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 15:40:28,604 INFO L87 Difference]: Start difference. First operand 357 states and 360 transitions. Second operand has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:29,408 INFO L93 Difference]: Finished difference Result 374 states and 378 transitions. [2022-07-13 15:40:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-13 15:40:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2022-07-13 15:40:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:29,410 INFO L225 Difference]: With dead ends: 374 [2022-07-13 15:40:29,410 INFO L226 Difference]: Without dead ends: 372 [2022-07-13 15:40:29,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 765 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5804, Invalid=9946, Unknown=0, NotChecked=0, Total=15750 [2022-07-13 15:40:29,412 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 310 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:29,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 621 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:40:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-07-13 15:40:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 365. [2022-07-13 15:40:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.010989010989011) internal successors, (368), 364 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 368 transitions. [2022-07-13 15:40:29,464 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 368 transitions. Word has length 356 [2022-07-13 15:40:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:29,464 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 368 transitions. [2022-07-13 15:40:29,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 368 transitions. [2022-07-13 15:40:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-07-13 15:40:29,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:29,466 INFO L195 NwaCegarLoop]: trace histogram [60, 59, 59, 59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:29,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-07-13 15:40:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:29,680 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1320998341, now seen corresponding path program 70 times [2022-07-13 15:40:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:29,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140276806] [2022-07-13 15:40:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6788 proven. 3596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:32,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:32,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140276806] [2022-07-13 15:40:32,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140276806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144490495] [2022-07-13 15:40:32,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:40:32,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:32,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:32,073 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:32,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-13 15:40:32,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:40:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:40:32,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-13 15:40:32,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:35,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:35,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144490495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:35,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:35,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 185 [2022-07-13 15:40:35,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430920999] [2022-07-13 15:40:35,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2022-07-13 15:40:35,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2022-07-13 15:40:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7690, Invalid=26350, Unknown=0, NotChecked=0, Total=34040 [2022-07-13 15:40:35,563 INFO L87 Difference]: Start difference. First operand 365 states and 368 transitions. Second operand has 185 states, 185 states have (on average 3.3351351351351353) internal successors, (617), 185 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:39,733 INFO L93 Difference]: Finished difference Result 1087 states and 1212 transitions. [2022-07-13 15:40:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-07-13 15:40:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 3.3351351351351353) internal successors, (617), 185 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2022-07-13 15:40:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:39,735 INFO L225 Difference]: With dead ends: 1087 [2022-07-13 15:40:39,735 INFO L226 Difference]: Without dead ends: 609 [2022-07-13 15:40:39,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22234 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22269, Invalid=69843, Unknown=0, NotChecked=0, Total=92112 [2022-07-13 15:40:39,739 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1082 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:39,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 2134 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 15:40:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-07-13 15:40:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 369. [2022-07-13 15:40:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.0108695652173914) internal successors, (372), 368 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 372 transitions. [2022-07-13 15:40:39,787 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 372 transitions. Word has length 364 [2022-07-13 15:40:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:39,787 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 372 transitions. [2022-07-13 15:40:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 3.3351351351351353) internal successors, (617), 185 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 372 transitions. [2022-07-13 15:40:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-07-13 15:40:39,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:39,788 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:39,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-13 15:40:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:40,006 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash 21577541, now seen corresponding path program 71 times [2022-07-13 15:40:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:40,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107895666] [2022-07-13 15:40:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:40,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3540 proven. 7082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:40,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107895666] [2022-07-13 15:40:40,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107895666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:40,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119459174] [2022-07-13 15:40:40,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:40:40,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:40,954 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:40,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-13 15:40:41,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2022-07-13 15:40:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:40:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-13 15:40:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:41,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:41,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119459174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:41,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:41,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 67 [2022-07-13 15:40:41,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544496133] [2022-07-13 15:40:41,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-13 15:40:41,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-13 15:40:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2022-07-13 15:40:41,773 INFO L87 Difference]: Start difference. First operand 369 states and 372 transitions. Second operand has 67 states, 67 states have (on average 5.835820895522388) internal successors, (391), 67 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:42,570 INFO L93 Difference]: Finished difference Result 386 states and 390 transitions. [2022-07-13 15:40:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-07-13 15:40:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.835820895522388) internal successors, (391), 67 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 368 [2022-07-13 15:40:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:42,572 INFO L225 Difference]: With dead ends: 386 [2022-07-13 15:40:42,572 INFO L226 Difference]: Without dead ends: 384 [2022-07-13 15:40:42,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 791 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=6183, Invalid=10587, Unknown=0, NotChecked=0, Total=16770 [2022-07-13 15:40:42,574 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 264 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:42,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 638 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:40:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-13 15:40:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 377. [2022-07-13 15:40:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0106382978723405) internal successors, (380), 376 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 380 transitions. [2022-07-13 15:40:42,624 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 380 transitions. Word has length 368 [2022-07-13 15:40:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:42,624 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 380 transitions. [2022-07-13 15:40:42,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.835820895522388) internal successors, (391), 67 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 380 transitions. [2022-07-13 15:40:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-07-13 15:40:42,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:42,626 INFO L195 NwaCegarLoop]: trace histogram [62, 61, 61, 61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:42,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-13 15:40:42,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:42,844 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash 534281259, now seen corresponding path program 72 times [2022-07-13 15:40:42,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:42,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608352949] [2022-07-13 15:40:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:42,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7262 proven. 3840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:45,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608352949] [2022-07-13 15:40:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608352949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289151712] [2022-07-13 15:40:45,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:40:45,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:45,182 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:45,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-13 15:40:45,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-07-13 15:40:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:40:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-13 15:40:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7442 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:48,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7442 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:48,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289151712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:48,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:48,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 191 [2022-07-13 15:40:48,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528535673] [2022-07-13 15:40:48,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:48,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-07-13 15:40:48,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:48,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-07-13 15:40:48,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8194, Invalid=28096, Unknown=0, NotChecked=0, Total=36290 [2022-07-13 15:40:48,825 INFO L87 Difference]: Start difference. First operand 377 states and 380 transitions. Second operand has 191 states, 191 states have (on average 3.3350785340314135) internal successors, (637), 191 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:54,163 INFO L93 Difference]: Finished difference Result 1123 states and 1252 transitions. [2022-07-13 15:40:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-07-13 15:40:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 3.3350785340314135) internal successors, (637), 191 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 376 [2022-07-13 15:40:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:54,165 INFO L225 Difference]: With dead ends: 1123 [2022-07-13 15:40:54,165 INFO L226 Difference]: Without dead ends: 629 [2022-07-13 15:40:54,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23720 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=23755, Invalid=74527, Unknown=0, NotChecked=0, Total=98282 [2022-07-13 15:40:54,171 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1106 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 3124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:54,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 2387 Invalid, 3124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 15:40:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-07-13 15:40:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 381. [2022-07-13 15:40:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.0105263157894737) internal successors, (384), 380 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 384 transitions. [2022-07-13 15:40:54,223 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 384 transitions. Word has length 376 [2022-07-13 15:40:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:54,223 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 384 transitions. [2022-07-13 15:40:54,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 3.3350785340314135) internal successors, (637), 191 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 384 transitions. [2022-07-13 15:40:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-07-13 15:40:54,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:54,225 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:54,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-13 15:40:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-13 15:40:54,436 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1484434891, now seen corresponding path program 73 times [2022-07-13 15:40:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:54,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537563216] [2022-07-13 15:40:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:54,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3782 proven. 7566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:55,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:40:55,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537563216] [2022-07-13 15:40:55,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537563216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:40:55,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896361948] [2022-07-13 15:40:55,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:40:55,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:40:55,533 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:40:55,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-13 15:40:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:40:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 127 conjunts are in the unsatisfiable core [2022-07-13 15:40:55,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:40:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:55,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:40:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:40:56,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896361948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:40:56,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:40:56,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 69 [2022-07-13 15:40:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971054963] [2022-07-13 15:40:56,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:40:56,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-13 15:40:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:40:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-13 15:40:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2154, Invalid=2538, Unknown=0, NotChecked=0, Total=4692 [2022-07-13 15:40:56,146 INFO L87 Difference]: Start difference. First operand 381 states and 384 transitions. Second operand has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:40:56,997 INFO L93 Difference]: Finished difference Result 398 states and 402 transitions. [2022-07-13 15:40:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-07-13 15:40:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 380 [2022-07-13 15:40:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:40:56,998 INFO L225 Difference]: With dead ends: 398 [2022-07-13 15:40:56,998 INFO L226 Difference]: Without dead ends: 396 [2022-07-13 15:40:56,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=6574, Invalid=11248, Unknown=0, NotChecked=0, Total=17822 [2022-07-13 15:40:57,000 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 332 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:40:57,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 672 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:40:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-13 15:40:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 389. [2022-07-13 15:40:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0103092783505154) internal successors, (392), 388 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 392 transitions. [2022-07-13 15:40:57,052 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 392 transitions. Word has length 380 [2022-07-13 15:40:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:40:57,052 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 392 transitions. [2022-07-13 15:40:57,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:40:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 392 transitions. [2022-07-13 15:40:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-07-13 15:40:57,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:40:57,054 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:40:57,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-07-13 15:40:57,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:40:57,255 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:40:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:40:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1710579941, now seen corresponding path program 74 times [2022-07-13 15:40:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:40:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740737334] [2022-07-13 15:40:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:40:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:40:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:41:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7752 proven. 4092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:41:00,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:41:00,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740737334] [2022-07-13 15:41:00,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740737334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:41:00,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960993464] [2022-07-13 15:41:00,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:41:00,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:41:00,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:41:00,014 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:41:00,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-13 15:41:00,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:41:00,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:41:00,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-13 15:41:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:41:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:41:03,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:41:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:41:03,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960993464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:41:03,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:41:03,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 194 [2022-07-13 15:41:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83050164] [2022-07-13 15:41:03,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:41:03,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-07-13 15:41:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:41:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-07-13 15:41:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8388, Invalid=29054, Unknown=0, NotChecked=0, Total=37442 [2022-07-13 15:41:03,755 INFO L87 Difference]: Start difference. First operand 389 states and 392 transitions. Second operand has 194 states, 194 states have (on average 3.3402061855670104) internal successors, (648), 194 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:41:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:41:07,032 INFO L93 Difference]: Finished difference Result 900 states and 1030 transitions. [2022-07-13 15:41:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-07-13 15:41:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.3402061855670104) internal successors, (648), 194 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2022-07-13 15:41:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:41:07,034 INFO L225 Difference]: With dead ends: 900 [2022-07-13 15:41:07,034 INFO L226 Difference]: Without dead ends: 643 [2022-07-13 15:41:07,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14540 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16454, Invalid=49338, Unknown=0, NotChecked=0, Total=65792 [2022-07-13 15:41:07,038 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1036 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 15:41:07,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1770 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 15:41:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-07-13 15:41:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 391. [2022-07-13 15:41:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0102564102564102) internal successors, (394), 390 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:41:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 394 transitions. [2022-07-13 15:41:07,093 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 394 transitions. Word has length 388 [2022-07-13 15:41:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:41:07,093 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 394 transitions. [2022-07-13 15:41:07,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.3402061855670104) internal successors, (648), 194 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:41:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 394 transitions. [2022-07-13 15:41:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-07-13 15:41:07,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:41:07,095 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:41:07,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-13 15:41:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:41:07,307 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:41:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:41:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1045177664, now seen corresponding path program 75 times [2022-07-13 15:41:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:41:07,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882102150] [2022-07-13 15:41:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:41:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:41:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:41:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7752 proven. 4218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:41:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:41:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882102150] [2022-07-13 15:41:10,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882102150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:41:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337354249] [2022-07-13 15:41:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:41:10,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:41:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:41:10,109 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:41:10,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-13 15:41:10,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2022-07-13 15:41:10,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:41:10,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 130 conjunts are in the unsatisfiable core [2022-07-13 15:41:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates...