./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/seq-3.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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 03:57:50,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 03:57:50,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 03:57:50,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 03:57:50,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 03:57:50,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 03:57:50,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 03:57:50,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 03:57:50,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 03:57:50,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 03:57:50,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 03:57:50,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 03:57:50,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 03:57:50,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 03:57:50,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 03:57:50,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 03:57:50,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 03:57:50,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 03:57:50,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 03:57:50,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 03:57:50,691 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 03:57:50,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 03:57:50,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 03:57:50,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 03:57:50,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 03:57:50,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 03:57:50,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 03:57:50,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 03:57:50,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 03:57:50,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 03:57:50,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 03:57:50,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 03:57:50,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 03:57:50,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 03:57:50,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 03:57:50,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 03:57:50,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 03:57:50,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 03:57:50,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 03:57:50,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 03:57:50,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 03:57:50,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 03:57:50,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 03:57:50,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 03:57:50,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 03:57:50,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 03:57:50,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 03:57:50,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 03:57:50,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 03:57:50,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 03:57:50,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 03:57:50,735 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 03:57:50,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 03:57:50,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 03:57:50,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 03:57:50,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 03:57:50,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 03:57:50,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 03:57:50,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 03:57:50,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 03:57:50,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 03:57:50,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:57:50,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 03:57:50,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 03:57:50,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 03:57:50,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 03:57:50,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 03:57:50,739 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 03:57:50,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 03:57:50,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 03:57:50,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2022-07-12 03:57:50,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 03:57:50,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 03:57:50,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 03:57:50,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 03:57:50,953 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 03:57:50,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2022-07-12 03:57:51,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4040c9c2/02822c61fcb04c83839de11777444818/FLAG53f8397df [2022-07-12 03:57:51,358 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 03:57:51,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2022-07-12 03:57:51,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4040c9c2/02822c61fcb04c83839de11777444818/FLAG53f8397df [2022-07-12 03:57:51,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4040c9c2/02822c61fcb04c83839de11777444818 [2022-07-12 03:57:51,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 03:57:51,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 03:57:51,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 03:57:51,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 03:57:51,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 03:57:51,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ce2021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51, skipping insertion in model container [2022-07-12 03:57:51,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 03:57:51,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 03:57:51,536 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/seq-3.i[893,906] [2022-07-12 03:57:51,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:57:51,552 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 03:57:51,561 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/seq-3.i[893,906] [2022-07-12 03:57:51,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:57:51,580 INFO L208 MainTranslator]: Completed translation [2022-07-12 03:57:51,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51 WrapperNode [2022-07-12 03:57:51,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 03:57:51,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 03:57:51,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 03:57:51,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 03:57:51,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,607 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-07-12 03:57:51,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 03:57:51,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 03:57:51,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 03:57:51,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 03:57:51,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 03:57:51,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 03:57:51,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 03:57:51,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 03:57:51,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (1/1) ... [2022-07-12 03:57:51,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:57:51,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:51,670 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) [2022-07-12 03:57:51,672 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 [2022-07-12 03:57:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 03:57:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 03:57:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 03:57:51,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 03:57:51,748 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 03:57:51,749 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 03:57:51,820 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 03:57:51,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 03:57:51,824 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 03:57:51,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:57:51 BoogieIcfgContainer [2022-07-12 03:57:51,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 03:57:51,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 03:57:51,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 03:57:51,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 03:57:51,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 03:57:51" (1/3) ... [2022-07-12 03:57:51,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370ebe51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:57:51, skipping insertion in model container [2022-07-12 03:57:51,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:51" (2/3) ... [2022-07-12 03:57:51,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370ebe51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:57:51, skipping insertion in model container [2022-07-12 03:57:51,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:57:51" (3/3) ... [2022-07-12 03:57:51,830 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.i [2022-07-12 03:57:51,839 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 03:57:51,840 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 03:57:51,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 03:57:51,871 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@1621ea92, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c6142e5 [2022-07-12 03:57:51,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 03:57:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 03:57:51,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:51,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:51,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2022-07-12 03:57:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:51,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509010534] [2022-07-12 03:57:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:51,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509010534] [2022-07-12 03:57:52,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509010534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:52,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:52,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:52,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449138466] [2022-07-12 03:57:52,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:52,163 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:52,255 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-07-12 03:57:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 03:57:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-07-12 03:57:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:52,263 INFO L225 Difference]: With dead ends: 48 [2022-07-12 03:57:52,263 INFO L226 Difference]: Without dead ends: 23 [2022-07-12 03:57:52,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-12 03:57:52,267 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:52,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-12 03:57:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2022-07-12 03:57:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-12 03:57:52,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-07-12 03:57:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:52,294 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-12 03:57:52,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-12 03:57:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 03:57:52,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:52,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:52,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 03:57:52,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2022-07-12 03:57:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:52,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155142118] [2022-07-12 03:57:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:52,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155142118] [2022-07-12 03:57:52,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155142118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:52,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035890929] [2022-07-12 03:57:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:52,369 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) [2022-07-12 03:57:52,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 03:57:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:52,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 03:57:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:52,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 03:57:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035890929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:52,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 03:57:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-12 03:57:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400575642] [2022-07-12 03:57:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:52,454 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-12 03:57:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:52,495 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-07-12 03:57:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 03:57:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-07-12 03:57:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:52,512 INFO L225 Difference]: With dead ends: 26 [2022-07-12 03:57:52,512 INFO L226 Difference]: Without dead ends: 24 [2022-07-12 03:57:52,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 03:57:52,513 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:52,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-12 03:57:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-07-12 03:57:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-07-12 03:57:52,517 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-07-12 03:57:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:52,517 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-07-12 03:57:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-12 03:57:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-07-12 03:57:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 03:57:52,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:52,518 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:52,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:52,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:52,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:52,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2022-07-12 03:57:52,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:52,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119185852] [2022-07-12 03:57:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:52,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:52,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:52,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119185852] [2022-07-12 03:57:52,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119185852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:52,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26962313] [2022-07-12 03:57:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:52,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:52,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:52,813 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) [2022-07-12 03:57:52,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 03:57:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 03:57:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:52,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:52,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26962313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:52,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:52,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-12 03:57:52,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196721573] [2022-07-12 03:57:52,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:52,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 03:57:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 03:57:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-12 03:57:53,011 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:53,197 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-07-12 03:57:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 03:57:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 15 [2022-07-12 03:57:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:53,198 INFO L225 Difference]: With dead ends: 38 [2022-07-12 03:57:53,198 INFO L226 Difference]: Without dead ends: 28 [2022-07-12 03:57:53,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:57:53,200 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:53,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 100 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-12 03:57:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-07-12 03:57:53,202 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) [2022-07-12 03:57:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-12 03:57:53,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2022-07-12 03:57:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:53,203 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-12 03:57:53,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-12 03:57:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 03:57:53,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:53,203 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:53,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:53,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 03:57:53,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2022-07-12 03:57:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463628982] [2022-07-12 03:57:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:53,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:53,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463628982] [2022-07-12 03:57:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463628982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90813166] [2022-07-12 03:57:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:53,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:53,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:53,521 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) [2022-07-12 03:57:53,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 03:57:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 03:57:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:53,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:53,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90813166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:53,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:53,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-12 03:57:53,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221011368] [2022-07-12 03:57:53,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:53,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 03:57:53,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:53,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 03:57:53,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-07-12 03:57:53,685 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:53,776 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-12 03:57:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 03:57:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 15 [2022-07-12 03:57:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:53,779 INFO L225 Difference]: With dead ends: 50 [2022-07-12 03:57:53,779 INFO L226 Difference]: Without dead ends: 40 [2022-07-12 03:57:53,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:57:53,786 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:53,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-12 03:57:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-07-12 03:57:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-12 03:57:53,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-07-12 03:57:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:53,795 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-12 03:57:53,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-12 03:57:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:53,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:53,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:53,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:54,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:54,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:54,005 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2022-07-12 03:57:54,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:54,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108322135] [2022-07-12 03:57:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:54,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:54,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108322135] [2022-07-12 03:57:54,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108322135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275232909] [2022-07-12 03:57:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:57:54,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:54,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:54,067 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) [2022-07-12 03:57:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 03:57:54,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:57:54,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 03:57:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275232909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:54,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-07-12 03:57:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337072265] [2022-07-12 03:57:54,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:54,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 03:57:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 03:57:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 03:57:54,147 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:54,191 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-12 03:57:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 03:57:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-07-12 03:57:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:54,192 INFO L225 Difference]: With dead ends: 32 [2022-07-12 03:57:54,192 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 03:57:54,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 03:57:54,193 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:54,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 03:57:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-07-12 03:57:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-07-12 03:57:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-12 03:57:54,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-07-12 03:57:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:54,196 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-12 03:57:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-12 03:57:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 03:57:54,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:54,197 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:54,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2022-07-12 03:57:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:54,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068968103] [2022-07-12 03:57:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:54,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068968103] [2022-07-12 03:57:54,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068968103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733609319] [2022-07-12 03:57:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:57:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:54,508 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) [2022-07-12 03:57:54,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 03:57:54,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 03:57:54,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 03:57:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:54,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:54,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733609319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:54,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:54,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-12 03:57:54,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18737426] [2022-07-12 03:57:54,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 03:57:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 03:57:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-07-12 03:57:54,708 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:54,833 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-12 03:57:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 03:57:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 19 [2022-07-12 03:57:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:54,834 INFO L225 Difference]: With dead ends: 51 [2022-07-12 03:57:54,834 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 03:57:54,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-07-12 03:57:54,835 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:54,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 90 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 03:57:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-07-12 03:57:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-12 03:57:54,839 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-07-12 03:57:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:54,839 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-12 03:57:54,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-12 03:57:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 03:57:54,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:54,840 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:54,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:55,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:55,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2022-07-12 03:57:55,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:55,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097291197] [2022-07-12 03:57:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:55,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:55,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:55,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097291197] [2022-07-12 03:57:55,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097291197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:55,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815754099] [2022-07-12 03:57:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:55,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:55,139 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) [2022-07-12 03:57:55,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 03:57:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 03:57:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:55,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:55,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815754099] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:55,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:55,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-07-12 03:57:55,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453690788] [2022-07-12 03:57:55,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 03:57:55,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 03:57:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-07-12 03:57:55,325 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) [2022-07-12 03:57:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:55,493 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-07-12 03:57:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 03:57:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) Word has length 19 [2022-07-12 03:57:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:55,496 INFO L225 Difference]: With dead ends: 64 [2022-07-12 03:57:55,496 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 03:57:55,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2022-07-12 03:57:55,497 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:55,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 03:57:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2022-07-12 03:57:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-12 03:57:55,506 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-07-12 03:57:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:55,507 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-12 03:57:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) [2022-07-12 03:57:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-12 03:57:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 03:57:55,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:55,507 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:55,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 03:57:55,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:55,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2022-07-12 03:57:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:55,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542175284] [2022-07-12 03:57:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:55,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542175284] [2022-07-12 03:57:55,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542175284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327905760] [2022-07-12 03:57:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:57:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:55,806 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) [2022-07-12 03:57:55,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 03:57:55,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:57:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 03:57:55,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:55,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:55,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327905760] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:55,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:55,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-07-12 03:57:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831507265] [2022-07-12 03:57:55,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 03:57:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 03:57:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-12 03:57:55,975 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2022-07-12 03:57:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:56,112 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-07-12 03:57:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 03:57:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 19 [2022-07-12 03:57:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:56,113 INFO L225 Difference]: With dead ends: 79 [2022-07-12 03:57:56,113 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 03:57:56,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-07-12 03:57:56,114 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:56,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 106 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 03:57:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2022-07-12 03:57:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-12 03:57:56,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2022-07-12 03:57:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:56,117 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-12 03:57:56,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2022-07-12 03:57:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-12 03:57:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 03:57:56,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:56,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:56,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:56,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:56,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:56,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2022-07-12 03:57:56,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:56,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036711918] [2022-07-12 03:57:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:56,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036711918] [2022-07-12 03:57:56,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036711918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970709333] [2022-07-12 03:57:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:57:56,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:56,392 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) [2022-07-12 03:57:56,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 03:57:56,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:57:56,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 03:57:56,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:56,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:56,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970709333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:56,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:56,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-12 03:57:56,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139284042] [2022-07-12 03:57:56,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:56,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 03:57:56,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 03:57:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 03:57:56,478 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-07-12 03:57:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:56,538 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-07-12 03:57:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 03:57:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) Word has length 20 [2022-07-12 03:57:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:56,538 INFO L225 Difference]: With dead ends: 38 [2022-07-12 03:57:56,538 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 03:57:56,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-12 03:57:56,539 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:56,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 03:57:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-07-12 03:57:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-07-12 03:57:56,542 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2022-07-12 03:57:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:56,542 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-07-12 03:57:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-07-12 03:57:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-07-12 03:57:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 03:57:56,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:56,543 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:56,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:56,759 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,SelfDestructingSolverStorable8 [2022-07-12 03:57:56,759 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2022-07-12 03:57:56,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324736400] [2022-07-12 03:57:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:56,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:56,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324736400] [2022-07-12 03:57:56,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324736400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:56,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782382810] [2022-07-12 03:57:56,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:57:56,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:56,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:56,851 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) [2022-07-12 03:57:56,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 03:57:56,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 03:57:56,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 03:57:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782382810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:57,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-12 03:57:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108086343] [2022-07-12 03:57:57,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 03:57:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 03:57:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-07-12 03:57:57,099 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:57,249 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-07-12 03:57:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 03:57:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2022-07-12 03:57:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:57,249 INFO L225 Difference]: With dead ends: 64 [2022-07-12 03:57:57,249 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 03:57:57,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 03:57:57,250 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:57,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 121 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 03:57:57,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2022-07-12 03:57:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-12 03:57:57,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-07-12 03:57:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:57,254 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-12 03:57:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-12 03:57:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 03:57:57,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:57,255 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:57,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:57,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 03:57:57,464 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2022-07-12 03:57:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95099184] [2022-07-12 03:57:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:57,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95099184] [2022-07-12 03:57:57,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95099184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829074598] [2022-07-12 03:57:57,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:57:57,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:57,538 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) [2022-07-12 03:57:57,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 03:57:57,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:57:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 03:57:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829074598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:57,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:57,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-07-12 03:57:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457097087] [2022-07-12 03:57:57,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:57,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 03:57:57,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 03:57:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-12 03:57:57,754 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:57,940 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-07-12 03:57:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 03:57:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 23 [2022-07-12 03:57:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:57,941 INFO L225 Difference]: With dead ends: 81 [2022-07-12 03:57:57,941 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 03:57:57,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 03:57:57,942 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:57,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 03:57:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2022-07-12 03:57:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-12 03:57:57,946 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-07-12 03:57:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:57,947 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-12 03:57:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-12 03:57:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 03:57:57,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:57,947 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:57,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:58,164 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,SelfDestructingSolverStorable10 [2022-07-12 03:57:58,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2022-07-12 03:57:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:58,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343767529] [2022-07-12 03:57:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:58,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343767529] [2022-07-12 03:57:58,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343767529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:58,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541619932] [2022-07-12 03:57:58,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:57:58,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:58,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:58,250 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) [2022-07-12 03:57:58,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 03:57:58,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 03:57:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 03:57:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541619932] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:58,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:58,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-07-12 03:57:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324619982] [2022-07-12 03:57:58,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 03:57:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 03:57:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:57:58,454 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:58,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:58,639 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-07-12 03:57:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 03:57:58,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2022-07-12 03:57:58,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:58,639 INFO L225 Difference]: With dead ends: 97 [2022-07-12 03:57:58,639 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 03:57:58,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 03:57:58,640 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:58,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 152 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 03:57:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2022-07-12 03:57:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-12 03:57:58,644 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-07-12 03:57:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:58,644 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-12 03:57:58,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-12 03:57:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 03:57:58,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:58,644 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:58,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:58,861 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,SelfDestructingSolverStorable11 [2022-07-12 03:57:58,861 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2022-07-12 03:57:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:58,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960772124] [2022-07-12 03:57:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:58,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960772124] [2022-07-12 03:57:58,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960772124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:58,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958226715] [2022-07-12 03:57:58,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:57:58,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:58,954 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) [2022-07-12 03:57:58,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 03:57:58,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 03:57:58,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:58,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 03:57:58,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958226715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:59,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:59,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-07-12 03:57:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491996360] [2022-07-12 03:57:59,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:59,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 03:57:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 03:57:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-07-12 03:57:59,145 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2022-07-12 03:57:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:59,327 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-07-12 03:57:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 03:57:59,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 23 [2022-07-12 03:57:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:59,327 INFO L225 Difference]: With dead ends: 115 [2022-07-12 03:57:59,328 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 03:57:59,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 03:57:59,328 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:59,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 03:57:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2022-07-12 03:57:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2022-07-12 03:57:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-07-12 03:57:59,332 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-07-12 03:57:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:59,333 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-07-12 03:57:59,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2022-07-12 03:57:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-07-12 03:57:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 03:57:59,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:59,333 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:59,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:59,543 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,SelfDestructingSolverStorable12 [2022-07-12 03:57:59,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2022-07-12 03:57:59,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157972683] [2022-07-12 03:57:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157972683] [2022-07-12 03:57:59,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157972683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886324901] [2022-07-12 03:57:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:57:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:59,597 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) [2022-07-12 03:57:59,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 03:57:59,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 03:57:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 03:57:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886324901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:59,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:59,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-07-12 03:57:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791566890] [2022-07-12 03:57:59,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 03:57:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 03:57:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 03:57:59,695 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:59,767 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-07-12 03:57:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 03:57:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-07-12 03:57:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:59,768 INFO L225 Difference]: With dead ends: 44 [2022-07-12 03:57:59,768 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 03:57:59,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-07-12 03:57:59,769 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:59,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 84 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 03:57:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-07-12 03:57:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2022-07-12 03:57:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-12 03:57:59,773 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2022-07-12 03:57:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:59,774 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-12 03:57:59,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-12 03:57:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 03:57:59,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:59,774 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:59,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:59,991 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,SelfDestructingSolverStorable13 [2022-07-12 03:57:59,991 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2022-07-12 03:57:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:59,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490739355] [2022-07-12 03:57:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:00,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490739355] [2022-07-12 03:58:00,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490739355] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:00,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74120771] [2022-07-12 03:58:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:00,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:00,117 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) [2022-07-12 03:58:00,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 03:58:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:00,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 03:58:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74120771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:00,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:00,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-07-12 03:58:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566152190] [2022-07-12 03:58:00,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 03:58:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 03:58:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-07-12 03:58:00,409 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:00,601 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-07-12 03:58:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 03:58:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 27 [2022-07-12 03:58:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:00,601 INFO L225 Difference]: With dead ends: 77 [2022-07-12 03:58:00,602 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 03:58:00,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:58:00,603 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:00,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 147 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 03:58:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-07-12 03:58:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-12 03:58:00,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-07-12 03:58:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:00,608 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-12 03:58:00,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-12 03:58:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 03:58:00,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:00,612 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:00,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:00,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,824 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2022-07-12 03:58:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:00,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753001871] [2022-07-12 03:58:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:00,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753001871] [2022-07-12 03:58:00,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753001871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588315380] [2022-07-12 03:58:00,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:00,970 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) [2022-07-12 03:58:00,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 03:58:01,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:01,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 03:58:01,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588315380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:01,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:01,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-07-12 03:58:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070131365] [2022-07-12 03:58:01,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 03:58:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 03:58:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-07-12 03:58:01,253 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:01,469 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-07-12 03:58:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 03:58:01,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 27 [2022-07-12 03:58:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:01,470 INFO L225 Difference]: With dead ends: 98 [2022-07-12 03:58:01,470 INFO L226 Difference]: Without dead ends: 79 [2022-07-12 03:58:01,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:58:01,471 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:01,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 104 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-12 03:58:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2022-07-12 03:58:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-12 03:58:01,496 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-07-12 03:58:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:01,496 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-12 03:58:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-12 03:58:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 03:58:01,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:01,497 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:01,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:01,714 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,SelfDestructingSolverStorable15 [2022-07-12 03:58:01,714 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:01,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2022-07-12 03:58:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482614910] [2022-07-12 03:58:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:01,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482614910] [2022-07-12 03:58:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482614910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965442113] [2022-07-12 03:58:01,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:01,808 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) [2022-07-12 03:58:01,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 03:58:01,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 03:58:01,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 03:58:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965442113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:02,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:02,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-07-12 03:58:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165871601] [2022-07-12 03:58:02,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:02,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 03:58:02,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 03:58:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-07-12 03:58:02,058 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:02,304 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-07-12 03:58:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 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 27 [2022-07-12 03:58:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:02,305 INFO L225 Difference]: With dead ends: 118 [2022-07-12 03:58:02,305 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 03:58:02,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 03:58:02,307 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:02,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 171 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 03:58:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2022-07-12 03:58:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-12 03:58:02,314 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-07-12 03:58:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:02,315 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-12 03:58:02,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-12 03:58:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 03:58:02,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:02,316 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:02,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 03:58:02,528 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2022-07-12 03:58:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243574354] [2022-07-12 03:58:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:02,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243574354] [2022-07-12 03:58:02,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243574354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:02,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818402824] [2022-07-12 03:58:02,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:02,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:02,616 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) [2022-07-12 03:58:02,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 03:58:02,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 03:58:02,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:02,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 03:58:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818402824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:02,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:02,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-07-12 03:58:02,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219024946] [2022-07-12 03:58:02,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:02,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 03:58:02,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:02,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 03:58:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-07-12 03:58:02,858 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-07-12 03:58:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:03,051 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-07-12 03:58:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 03:58:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) Word has length 27 [2022-07-12 03:58:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:03,051 INFO L225 Difference]: With dead ends: 137 [2022-07-12 03:58:03,052 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 03:58:03,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:58:03,053 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:03,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 133 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 03:58:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2022-07-12 03:58:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-12 03:58:03,059 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-07-12 03:58:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:03,059 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-12 03:58:03,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-07-12 03:58:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-12 03:58:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 03:58:03,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:03,059 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:03,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:03,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 03:58:03,276 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2022-07-12 03:58:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630957273] [2022-07-12 03:58:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630957273] [2022-07-12 03:58:03,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630957273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830419246] [2022-07-12 03:58:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:03,358 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) [2022-07-12 03:58:03,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 03:58:03,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 03:58:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830419246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:03,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:03,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-07-12 03:58:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575838329] [2022-07-12 03:58:03,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:03,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 03:58:03,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 03:58:03,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-07-12 03:58:03,619 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:03,865 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-07-12 03:58:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2022-07-12 03:58:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:03,866 INFO L225 Difference]: With dead ends: 158 [2022-07-12 03:58:03,866 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 03:58:03,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:58:03,867 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:03,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 150 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 03:58:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2022-07-12 03:58:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 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) [2022-07-12 03:58:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-07-12 03:58:03,873 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2022-07-12 03:58:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:03,874 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-07-12 03:58:03,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-07-12 03:58:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 03:58:03,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:03,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:03,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:04,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:04,091 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2022-07-12 03:58:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:04,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212663552] [2022-07-12 03:58:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:04,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212663552] [2022-07-12 03:58:04,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212663552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122231066] [2022-07-12 03:58:04,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:04,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:04,151 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) [2022-07-12 03:58:04,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 03:58:04,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 03:58:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122231066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:04,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:04,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-12 03:58:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10348019] [2022-07-12 03:58:04,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:04,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 03:58:04,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 03:58:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-12 03:58:04,266 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:04,359 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-12 03:58:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 03:58:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2022-07-12 03:58:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:04,360 INFO L225 Difference]: With dead ends: 50 [2022-07-12 03:58:04,360 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 03:58:04,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-07-12 03:58:04,361 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:04,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 80 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 03:58:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-07-12 03:58:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-12 03:58:04,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2022-07-12 03:58:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:04,367 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-12 03:58:04,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-12 03:58:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:04,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:04,368 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:04,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:04,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:04,584 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2022-07-12 03:58:04,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:04,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22322547] [2022-07-12 03:58:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22322547] [2022-07-12 03:58:04,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22322547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308130919] [2022-07-12 03:58:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:04,744 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) [2022-07-12 03:58:04,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 03:58:04,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 03:58:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308130919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:05,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:05,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-12 03:58:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706474005] [2022-07-12 03:58:05,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:05,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 03:58:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 03:58:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 03:58:05,113 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:05,339 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-07-12 03:58:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 03:58:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 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 31 [2022-07-12 03:58:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:05,340 INFO L225 Difference]: With dead ends: 90 [2022-07-12 03:58:05,340 INFO L226 Difference]: Without dead ends: 68 [2022-07-12 03:58:05,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 03:58:05,341 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:05,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 157 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-12 03:58:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-07-12 03:58:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2022-07-12 03:58:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-12 03:58:05,349 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-07-12 03:58:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:05,349 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-12 03:58:05,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-12 03:58:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:05,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:05,350 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:05,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:05,566 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,SelfDestructingSolverStorable20 [2022-07-12 03:58:05,567 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2022-07-12 03:58:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213514670] [2022-07-12 03:58:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:05,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:05,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213514670] [2022-07-12 03:58:05,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213514670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161845123] [2022-07-12 03:58:05,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:05,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:05,665 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) [2022-07-12 03:58:05,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 03:58:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161845123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:05,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:05,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-07-12 03:58:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028264483] [2022-07-12 03:58:05,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 03:58:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 03:58:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-07-12 03:58:05,917 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 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) [2022-07-12 03:58:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:06,187 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-07-12 03:58:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 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) Word has length 31 [2022-07-12 03:58:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:06,191 INFO L225 Difference]: With dead ends: 115 [2022-07-12 03:58:06,191 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 03:58:06,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 03:58:06,192 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:06,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 225 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 03:58:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2022-07-12 03:58:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2022-07-12 03:58:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-12 03:58:06,202 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-07-12 03:58:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:06,202 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-12 03:58:06,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 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) [2022-07-12 03:58:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-12 03:58:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:06,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:06,202 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:06,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 03:58:06,403 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,SelfDestructingSolverStorable21 [2022-07-12 03:58:06,404 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2022-07-12 03:58:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:06,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509298095] [2022-07-12 03:58:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509298095] [2022-07-12 03:58:06,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509298095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862152299] [2022-07-12 03:58:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:06,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:06,513 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) [2022-07-12 03:58:06,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 03:58:06,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862152299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:06,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:06,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-07-12 03:58:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184078936] [2022-07-12 03:58:06,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 03:58:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 03:58:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-07-12 03:58:06,805 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:07,091 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2022-07-12 03:58:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 03:58:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 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 31 [2022-07-12 03:58:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:07,093 INFO L225 Difference]: With dead ends: 139 [2022-07-12 03:58:07,093 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 03:58:07,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:58:07,094 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:07,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 173 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 03:58:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2022-07-12 03:58:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2022-07-12 03:58:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-12 03:58:07,103 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-07-12 03:58:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:07,103 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-12 03:58:07,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-12 03:58:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:07,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:07,104 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:07,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:07,320 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2022-07-12 03:58:07,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:07,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035823663] [2022-07-12 03:58:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:07,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:07,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035823663] [2022-07-12 03:58:07,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035823663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:07,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357782397] [2022-07-12 03:58:07,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:07,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:07,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:07,409 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) [2022-07-12 03:58:07,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 03:58:07,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 03:58:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:07,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:07,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357782397] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:07,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:07,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-07-12 03:58:07,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265836331] [2022-07-12 03:58:07,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:07,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 03:58:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 03:58:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-07-12 03:58:07,731 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-07-12 03:58:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:08,079 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-07-12 03:58:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:58:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) Word has length 31 [2022-07-12 03:58:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:08,080 INFO L225 Difference]: With dead ends: 162 [2022-07-12 03:58:08,080 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 03:58:08,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:58:08,082 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 132 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:08,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 171 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 03:58:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2022-07-12 03:58:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2022-07-12 03:58:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-12 03:58:08,094 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-07-12 03:58:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:08,094 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-12 03:58:08,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-07-12 03:58:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-12 03:58:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:08,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:08,095 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:08,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:08,311 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2022-07-12 03:58:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853639450] [2022-07-12 03:58:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:08,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:08,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:08,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853639450] [2022-07-12 03:58:08,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853639450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:08,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350700068] [2022-07-12 03:58:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:08,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:08,414 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) [2022-07-12 03:58:08,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 03:58:08,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:08,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:08,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350700068] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:08,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:08,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-07-12 03:58:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125356603] [2022-07-12 03:58:08,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:08,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 03:58:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 03:58:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-07-12 03:58:08,723 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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) [2022-07-12 03:58:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:09,071 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2022-07-12 03:58:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:58:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 31 [2022-07-12 03:58:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:09,072 INFO L225 Difference]: With dead ends: 184 [2022-07-12 03:58:09,072 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 03:58:09,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 03:58:09,073 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 144 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:09,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 165 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 03:58:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2022-07-12 03:58:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2022-07-12 03:58:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-12 03:58:09,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-07-12 03:58:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:09,086 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-12 03:58:09,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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) [2022-07-12 03:58:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-12 03:58:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:09,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:09,087 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:09,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:09,308 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,SelfDestructingSolverStorable24 [2022-07-12 03:58:09,308 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2022-07-12 03:58:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:09,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297143209] [2022-07-12 03:58:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297143209] [2022-07-12 03:58:09,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297143209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294409552] [2022-07-12 03:58:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:09,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:09,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:09,398 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) [2022-07-12 03:58:09,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 03:58:09,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 03:58:09,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:09,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294409552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:09,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-07-12 03:58:09,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137112011] [2022-07-12 03:58:09,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:09,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 03:58:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 03:58:09,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-07-12 03:58:09,639 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 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) [2022-07-12 03:58:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:09,913 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2022-07-12 03:58:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 03:58:09,913 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 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 31 [2022-07-12 03:58:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:09,914 INFO L225 Difference]: With dead ends: 208 [2022-07-12 03:58:09,914 INFO L226 Difference]: Without dead ends: 186 [2022-07-12 03:58:09,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 03:58:09,916 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 228 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:09,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 129 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-12 03:58:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2022-07-12 03:58:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-07-12 03:58:09,930 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2022-07-12 03:58:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:09,930 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-07-12 03:58:09,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 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) [2022-07-12 03:58:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-07-12 03:58:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 03:58:09,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:09,931 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:09,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:10,152 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,SelfDestructingSolverStorable25 [2022-07-12 03:58:10,153 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:10,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2022-07-12 03:58:10,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:10,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658885579] [2022-07-12 03:58:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:10,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:10,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658885579] [2022-07-12 03:58:10,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658885579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:10,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107783654] [2022-07-12 03:58:10,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:10,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:10,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:10,204 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) [2022-07-12 03:58:10,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 03:58:10,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:10,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 03:58:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107783654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:10,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:10,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-12 03:58:10,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936845493] [2022-07-12 03:58:10,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 03:58:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 03:58:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-07-12 03:58:10,325 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2022-07-12 03:58:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:10,436 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-07-12 03:58:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 03:58:10,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) Word has length 32 [2022-07-12 03:58:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:10,437 INFO L225 Difference]: With dead ends: 56 [2022-07-12 03:58:10,437 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 03:58:10,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-07-12 03:58:10,437 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:10,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 100 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 03:58:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-07-12 03:58:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-12 03:58:10,448 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2022-07-12 03:58:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:10,448 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-12 03:58:10,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2022-07-12 03:58:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-12 03:58:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:10,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:10,449 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:10,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:10,665 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,SelfDestructingSolverStorable26 [2022-07-12 03:58:10,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2022-07-12 03:58:10,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:10,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607768351] [2022-07-12 03:58:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607768351] [2022-07-12 03:58:10,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607768351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328042367] [2022-07-12 03:58:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:10,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:10,792 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) [2022-07-12 03:58:10,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 03:58:10,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 03:58:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:10,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:11,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:11,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328042367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:11,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:11,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-07-12 03:58:11,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953906500] [2022-07-12 03:58:11,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:11,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 03:58:11,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 03:58:11,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 03:58:11,165 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-07-12 03:58:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:11,415 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-07-12 03:58:11,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 03:58:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 35 [2022-07-12 03:58:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:11,416 INFO L225 Difference]: With dead ends: 103 [2022-07-12 03:58:11,416 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 03:58:11,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:58:11,417 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:11,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 142 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 03:58:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-07-12 03:58:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 03:58:11,429 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-07-12 03:58:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:11,429 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 03:58:11,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-07-12 03:58:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 03:58:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:11,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:11,430 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:11,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 03:58:11,634 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2022-07-12 03:58:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:11,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546905873] [2022-07-12 03:58:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:11,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546905873] [2022-07-12 03:58:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546905873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801477406] [2022-07-12 03:58:11,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:11,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:11,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:11,751 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) [2022-07-12 03:58:11,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 03:58:11,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 03:58:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:11,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:11,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801477406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:12,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:12,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-07-12 03:58:12,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196550649] [2022-07-12 03:58:12,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:12,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 03:58:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 03:58:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 03:58:12,141 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:12,430 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2022-07-12 03:58:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 03:58:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 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 35 [2022-07-12 03:58:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:12,431 INFO L225 Difference]: With dead ends: 132 [2022-07-12 03:58:12,431 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 03:58:12,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 03:58:12,433 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:12,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 182 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 03:58:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2022-07-12 03:58:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 03:58:12,454 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-07-12 03:58:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:12,454 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 03:58:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 03:58:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:12,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:12,455 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:12,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 03:58:12,671 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2022-07-12 03:58:12,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:12,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639338596] [2022-07-12 03:58:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:12,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639338596] [2022-07-12 03:58:12,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639338596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:12,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161057406] [2022-07-12 03:58:12,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:12,804 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) [2022-07-12 03:58:12,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 03:58:12,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 03:58:12,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:12,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:13,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:13,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161057406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:13,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:13,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-07-12 03:58:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676738351] [2022-07-12 03:58:13,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 03:58:13,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:13,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 03:58:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 03:58:13,143 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:13,499 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2022-07-12 03:58:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 03:58:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 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 35 [2022-07-12 03:58:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:13,500 INFO L225 Difference]: With dead ends: 160 [2022-07-12 03:58:13,500 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 03:58:13,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 03:58:13,503 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:13,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 167 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 03:58:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2022-07-12 03:58:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 03:58:13,527 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-07-12 03:58:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:13,527 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 03:58:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 03:58:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:13,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:13,528 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:13,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:13,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:13,731 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2022-07-12 03:58:13,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:13,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101923456] [2022-07-12 03:58:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:13,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:13,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101923456] [2022-07-12 03:58:13,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101923456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360970251] [2022-07-12 03:58:13,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:13,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:13,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:13,905 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) [2022-07-12 03:58:13,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 03:58:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:13,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360970251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:14,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:14,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2022-07-12 03:58:14,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394100277] [2022-07-12 03:58:14,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:14,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 03:58:14,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 03:58:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 03:58:14,242 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:14,647 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-07-12 03:58:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 03:58:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 35 [2022-07-12 03:58:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:14,648 INFO L225 Difference]: With dead ends: 187 [2022-07-12 03:58:14,648 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 03:58:14,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 03:58:14,649 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:14,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 207 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 03:58:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2022-07-12 03:58:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 03:58:14,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-07-12 03:58:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:14,664 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 03:58:14,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 03:58:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:14,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:14,665 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:14,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:14,879 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,SelfDestructingSolverStorable30 [2022-07-12 03:58:14,879 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2022-07-12 03:58:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375279092] [2022-07-12 03:58:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375279092] [2022-07-12 03:58:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375279092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442382775] [2022-07-12 03:58:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:14,999 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) [2022-07-12 03:58:15,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 03:58:15,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:15,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:15,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442382775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:15,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:15,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-07-12 03:58:15,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642517417] [2022-07-12 03:58:15,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:15,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 03:58:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 03:58:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 03:58:15,321 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:15,716 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-07-12 03:58:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 03:58:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 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 35 [2022-07-12 03:58:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:15,719 INFO L225 Difference]: With dead ends: 213 [2022-07-12 03:58:15,719 INFO L226 Difference]: Without dead ends: 188 [2022-07-12 03:58:15,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 03:58:15,721 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:15,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 163 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-12 03:58:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2022-07-12 03:58:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 03:58:15,750 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-07-12 03:58:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:15,750 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 03:58:15,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 03:58:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:15,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:15,751 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:15,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:15,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:15,967 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2022-07-12 03:58:15,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:15,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877517628] [2022-07-12 03:58:15,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:16,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877517628] [2022-07-12 03:58:16,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877517628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:16,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396021048] [2022-07-12 03:58:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:16,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:16,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:16,130 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) [2022-07-12 03:58:16,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 03:58:16,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 03:58:16,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396021048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:16,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:16,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2022-07-12 03:58:16,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020587421] [2022-07-12 03:58:16,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:16,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 03:58:16,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 03:58:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-07-12 03:58:16,443 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:16,781 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2022-07-12 03:58:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 03:58:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2022-07-12 03:58:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:16,781 INFO L225 Difference]: With dead ends: 238 [2022-07-12 03:58:16,781 INFO L226 Difference]: Without dead ends: 213 [2022-07-12 03:58:16,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 03:58:16,782 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:16,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 184 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-12 03:58:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2022-07-12 03:58:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 03:58:16,798 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-07-12 03:58:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:16,799 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 03:58:16,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 03:58:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:16,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:16,799 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:16,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-12 03:58:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:17,015 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2022-07-12 03:58:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985431205] [2022-07-12 03:58:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:17,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985431205] [2022-07-12 03:58:17,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985431205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:17,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222000084] [2022-07-12 03:58:17,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:17,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:17,138 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) [2022-07-12 03:58:17,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 03:58:17,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 03:58:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:17,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:17,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:17,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222000084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:17,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:17,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2022-07-12 03:58:17,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113463842] [2022-07-12 03:58:17,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:17,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 03:58:17,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 03:58:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-07-12 03:58:17,448 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:17,759 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-07-12 03:58:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 03:58:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 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 35 [2022-07-12 03:58:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:17,760 INFO L225 Difference]: With dead ends: 265 [2022-07-12 03:58:17,760 INFO L226 Difference]: Without dead ends: 240 [2022-07-12 03:58:17,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:58:17,761 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 206 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:17,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 184 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-12 03:58:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2022-07-12 03:58:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 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) [2022-07-12 03:58:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-07-12 03:58:17,788 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2022-07-12 03:58:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:17,789 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-07-12 03:58:17,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-07-12 03:58:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 03:58:17,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:17,789 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:17,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:18,005 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,SelfDestructingSolverStorable33 [2022-07-12 03:58:18,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2022-07-12 03:58:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:18,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506105526] [2022-07-12 03:58:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:18,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:18,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506105526] [2022-07-12 03:58:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506105526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993264078] [2022-07-12 03:58:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:18,062 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) [2022-07-12 03:58:18,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 03:58:18,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 03:58:18,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 03:58:18,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993264078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:18,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:18,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-07-12 03:58:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498829765] [2022-07-12 03:58:18,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:18,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 03:58:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 03:58:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-12 03:58:18,163 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:18,253 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-12 03:58:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 03:58:18,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2022-07-12 03:58:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:18,268 INFO L225 Difference]: With dead ends: 62 [2022-07-12 03:58:18,268 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 03:58:18,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-07-12 03:58:18,268 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:18,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 123 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 03:58:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-12 03:58:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-12 03:58:18,287 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2022-07-12 03:58:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:18,288 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-12 03:58:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-12 03:58:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:18,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:18,288 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:18,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:18,504 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,SelfDestructingSolverStorable34 [2022-07-12 03:58:18,505 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2022-07-12 03:58:18,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:18,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724774223] [2022-07-12 03:58:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724774223] [2022-07-12 03:58:18,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724774223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:18,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544104748] [2022-07-12 03:58:18,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:18,611 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) [2022-07-12 03:58:18,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 03:58:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:18,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544104748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:18,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:18,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-07-12 03:58:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849811624] [2022-07-12 03:58:18,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 03:58:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:18,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 03:58:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:58:18,899 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:19,147 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-07-12 03:58:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 03:58:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 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 39 [2022-07-12 03:58:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:19,147 INFO L225 Difference]: With dead ends: 116 [2022-07-12 03:58:19,147 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 03:58:19,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 03:58:19,148 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:19,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 177 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 03:58:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2022-07-12 03:58:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:19,178 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:19,178 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:19,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:19,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:19,179 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:19,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:19,395 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,SelfDestructingSolverStorable35 [2022-07-12 03:58:19,395 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:19,396 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2022-07-12 03:58:19,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:19,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027107115] [2022-07-12 03:58:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:19,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:19,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027107115] [2022-07-12 03:58:19,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027107115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810852067] [2022-07-12 03:58:19,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:19,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:19,545 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) [2022-07-12 03:58:19,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 03:58:19,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:19,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:19,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810852067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:19,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:19,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2022-07-12 03:58:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367720833] [2022-07-12 03:58:19,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 03:58:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 03:58:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 03:58:19,963 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:20,371 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-07-12 03:58:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:58:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 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 39 [2022-07-12 03:58:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:20,372 INFO L225 Difference]: With dead ends: 149 [2022-07-12 03:58:20,372 INFO L226 Difference]: Without dead ends: 121 [2022-07-12 03:58:20,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 03:58:20,373 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:20,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 179 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-12 03:58:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2022-07-12 03:58:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:20,396 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:20,396 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:20,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:20,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:20,397 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:20,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:20,614 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2022-07-12 03:58:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343594725] [2022-07-12 03:58:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343594725] [2022-07-12 03:58:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343594725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046711810] [2022-07-12 03:58:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:20,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:20,764 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) [2022-07-12 03:58:20,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 03:58:20,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-12 03:58:20,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:20,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:21,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046711810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:21,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:21,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2022-07-12 03:58:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557671891] [2022-07-12 03:58:21,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:21,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 03:58:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 03:58:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 03:58:21,165 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:21,631 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2022-07-12 03:58:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 03:58:21,631 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 39 [2022-07-12 03:58:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:21,632 INFO L225 Difference]: With dead ends: 181 [2022-07-12 03:58:21,632 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 03:58:21,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 03:58:21,637 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:21,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 275 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 03:58:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2022-07-12 03:58:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:21,664 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:21,664 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:21,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:21,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:21,665 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:21,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:21,883 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,SelfDestructingSolverStorable37 [2022-07-12 03:58:21,883 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2022-07-12 03:58:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:21,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864152274] [2022-07-12 03:58:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:22,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:22,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864152274] [2022-07-12 03:58:22,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864152274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:22,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538060465] [2022-07-12 03:58:22,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:22,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:22,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:22,030 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) [2022-07-12 03:58:22,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 03:58:22,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-12 03:58:22,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:22,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:22,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:22,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538060465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:22,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:22,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2022-07-12 03:58:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771452064] [2022-07-12 03:58:22,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:22,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 03:58:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 03:58:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 03:58:22,430 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 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) [2022-07-12 03:58:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:22,955 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2022-07-12 03:58:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 03:58:22,956 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 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) Word has length 39 [2022-07-12 03:58:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:22,956 INFO L225 Difference]: With dead ends: 212 [2022-07-12 03:58:22,957 INFO L226 Difference]: Without dead ends: 184 [2022-07-12 03:58:22,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 03:58:22,958 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:22,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-12 03:58:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2022-07-12 03:58:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:22,985 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:22,985 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:22,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 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) [2022-07-12 03:58:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:22,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:22,986 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:23,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:23,201 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,SelfDestructingSolverStorable38 [2022-07-12 03:58:23,201 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2022-07-12 03:58:23,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:23,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039667801] [2022-07-12 03:58:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:23,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:23,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039667801] [2022-07-12 03:58:23,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039667801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:23,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774808819] [2022-07-12 03:58:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:23,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:23,355 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) [2022-07-12 03:58:23,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 03:58:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:23,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:23,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774808819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:23,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:23,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-07-12 03:58:23,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348852466] [2022-07-12 03:58:23,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:23,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 03:58:23,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 03:58:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 03:58:23,664 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:24,110 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2022-07-12 03:58:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 03:58:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 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 39 [2022-07-12 03:58:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:24,111 INFO L225 Difference]: With dead ends: 242 [2022-07-12 03:58:24,111 INFO L226 Difference]: Without dead ends: 214 [2022-07-12 03:58:24,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 03:58:24,112 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 160 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:24,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 184 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-12 03:58:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2022-07-12 03:58:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:24,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:24,138 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:24,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:24,138 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:24,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:24,354 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,SelfDestructingSolverStorable39 [2022-07-12 03:58:24,354 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:24,355 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2022-07-12 03:58:24,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:24,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427186014] [2022-07-12 03:58:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:24,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427186014] [2022-07-12 03:58:24,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427186014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809105554] [2022-07-12 03:58:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:24,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:24,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:24,496 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) [2022-07-12 03:58:24,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 03:58:24,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:24,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:24,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:24,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809105554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:24,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:24,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2022-07-12 03:58:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252343969] [2022-07-12 03:58:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:24,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 03:58:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 03:58:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 03:58:24,878 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:25,361 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-07-12 03:58:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 03:58:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 39 [2022-07-12 03:58:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:25,362 INFO L225 Difference]: With dead ends: 271 [2022-07-12 03:58:25,362 INFO L226 Difference]: Without dead ends: 243 [2022-07-12 03:58:25,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 03:58:25,363 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 162 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:25,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 237 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-12 03:58:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2022-07-12 03:58:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:25,390 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:25,390 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:25,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:25,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:25,390 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:25,607 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,SelfDestructingSolverStorable40 [2022-07-12 03:58:25,607 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2022-07-12 03:58:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486280435] [2022-07-12 03:58:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486280435] [2022-07-12 03:58:25,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486280435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770508778] [2022-07-12 03:58:25,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:25,756 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) [2022-07-12 03:58:25,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 03:58:25,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 03:58:25,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:25,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:26,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:26,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770508778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:26,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:26,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2022-07-12 03:58:26,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169687662] [2022-07-12 03:58:26,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 03:58:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 03:58:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 03:58:26,112 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:26,651 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2022-07-12 03:58:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 03:58:26,651 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 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 39 [2022-07-12 03:58:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:26,652 INFO L225 Difference]: With dead ends: 299 [2022-07-12 03:58:26,652 INFO L226 Difference]: Without dead ends: 271 [2022-07-12 03:58:26,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 03:58:26,654 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 214 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:26,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 219 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-12 03:58:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2022-07-12 03:58:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 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) [2022-07-12 03:58:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-12 03:58:26,683 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-07-12 03:58:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:26,683 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-12 03:58:26,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-12 03:58:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:26,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:26,684 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:26,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:26,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:26,898 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2022-07-12 03:58:26,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:26,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194855049] [2022-07-12 03:58:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:27,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:27,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194855049] [2022-07-12 03:58:27,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194855049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:27,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35011579] [2022-07-12 03:58:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:27,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:27,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:27,040 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) [2022-07-12 03:58:27,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 03:58:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:27,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:27,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35011579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:27,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:27,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2022-07-12 03:58:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35935494] [2022-07-12 03:58:27,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:27,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 03:58:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 03:58:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 03:58:27,398 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) [2022-07-12 03:58:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:27,915 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2022-07-12 03:58:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 03:58:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) Word has length 39 [2022-07-12 03:58:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:27,916 INFO L225 Difference]: With dead ends: 329 [2022-07-12 03:58:27,916 INFO L226 Difference]: Without dead ends: 301 [2022-07-12 03:58:27,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 03:58:27,920 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 296 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:27,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 148 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-07-12 03:58:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2022-07-12 03:58:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-12 03:58:27,951 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2022-07-12 03:58:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:27,953 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-12 03:58:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) [2022-07-12 03:58:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-12 03:58:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 03:58:27,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:27,953 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:27,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:28,169 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2022-07-12 03:58:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701731349] [2022-07-12 03:58:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:28,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701731349] [2022-07-12 03:58:28,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701731349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:28,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509590998] [2022-07-12 03:58:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:28,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:28,242 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) [2022-07-12 03:58:28,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 03:58:28,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:28,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:28,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 03:58:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:28,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:28,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509590998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:28,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:28,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-07-12 03:58:28,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706846421] [2022-07-12 03:58:28,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:28,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 03:58:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 03:58:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-12 03:58:28,380 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:28,533 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-07-12 03:58:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:28,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 40 [2022-07-12 03:58:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:28,534 INFO L225 Difference]: With dead ends: 68 [2022-07-12 03:58:28,534 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 03:58:28,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-07-12 03:58:28,535 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:28,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 149 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 03:58:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-12 03:58:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-12 03:58:28,575 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2022-07-12 03:58:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:28,575 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-12 03:58:28,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-12 03:58:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:28,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:28,576 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:28,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:28,792 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,SelfDestructingSolverStorable43 [2022-07-12 03:58:28,793 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2022-07-12 03:58:28,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:28,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400207846] [2022-07-12 03:58:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:28,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:28,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400207846] [2022-07-12 03:58:28,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400207846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897075029] [2022-07-12 03:58:28,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:28,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:28,968 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) [2022-07-12 03:58:28,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 03:58:29,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 03:58:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:29,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:29,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897075029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:29,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:29,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-07-12 03:58:29,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133155889] [2022-07-12 03:58:29,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:29,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 03:58:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 03:58:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 03:58:29,473 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:29,850 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2022-07-12 03:58:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 43 [2022-07-12 03:58:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:29,851 INFO L225 Difference]: With dead ends: 129 [2022-07-12 03:58:29,851 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 03:58:29,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 03:58:29,851 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:29,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 153 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 03:58:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-07-12 03:58:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:29,886 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:29,887 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:29,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:29,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:29,887 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:29,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:30,103 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,SelfDestructingSolverStorable44 [2022-07-12 03:58:30,103 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2022-07-12 03:58:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:30,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008913339] [2022-07-12 03:58:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:30,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:30,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:30,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008913339] [2022-07-12 03:58:30,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008913339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:30,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374355112] [2022-07-12 03:58:30,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:30,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:30,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:30,269 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) [2022-07-12 03:58:30,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 03:58:30,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:30,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:30,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:30,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374355112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:30,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:30,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-07-12 03:58:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712741857] [2022-07-12 03:58:30,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 03:58:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 03:58:30,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:58:30,764 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 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) [2022-07-12 03:58:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:31,270 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2022-07-12 03:58:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 03:58:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 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) Word has length 43 [2022-07-12 03:58:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:31,271 INFO L225 Difference]: With dead ends: 166 [2022-07-12 03:58:31,271 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 03:58:31,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 03:58:31,272 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:31,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 178 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 03:58:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-07-12 03:58:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:31,311 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:31,312 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:31,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 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) [2022-07-12 03:58:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:31,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:31,312 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:31,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:31,528 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,SelfDestructingSolverStorable45 [2022-07-12 03:58:31,528 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2022-07-12 03:58:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949715358] [2022-07-12 03:58:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949715358] [2022-07-12 03:58:31,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949715358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415428548] [2022-07-12 03:58:31,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:31,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:31,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:31,692 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) [2022-07-12 03:58:31,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 03:58:31,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-12 03:58:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:32,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:32,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415428548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:32,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:32,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-07-12 03:58:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669755255] [2022-07-12 03:58:32,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:32,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 03:58:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 03:58:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 03:58:32,163 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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) [2022-07-12 03:58:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:32,763 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2022-07-12 03:58:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 03:58:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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 43 [2022-07-12 03:58:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:32,764 INFO L225 Difference]: With dead ends: 202 [2022-07-12 03:58:32,764 INFO L226 Difference]: Without dead ends: 171 [2022-07-12 03:58:32,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 03:58:32,765 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:32,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 230 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-12 03:58:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2022-07-12 03:58:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:32,805 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:32,805 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:32,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 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) [2022-07-12 03:58:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:32,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:32,806 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:32,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:33,021 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2022-07-12 03:58:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720865876] [2022-07-12 03:58:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:33,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:33,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:33,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720865876] [2022-07-12 03:58:33,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720865876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:33,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776543562] [2022-07-12 03:58:33,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:33,184 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) [2022-07-12 03:58:33,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 03:58:33,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-12 03:58:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:33,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:33,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776543562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:33,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:33,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2022-07-12 03:58:33,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100341323] [2022-07-12 03:58:33,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:33,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 03:58:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 03:58:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 03:58:33,692 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 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) [2022-07-12 03:58:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:34,262 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2022-07-12 03:58:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 03:58:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 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) Word has length 43 [2022-07-12 03:58:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:34,263 INFO L225 Difference]: With dead ends: 237 [2022-07-12 03:58:34,263 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 03:58:34,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2022-07-12 03:58:34,264 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:34,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 202 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 03:58:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2022-07-12 03:58:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:34,306 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:34,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:34,306 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:34,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 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) [2022-07-12 03:58:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:34,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:34,306 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:34,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-12 03:58:34,519 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,SelfDestructingSolverStorable47 [2022-07-12 03:58:34,519 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2022-07-12 03:58:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845042408] [2022-07-12 03:58:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:34,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:34,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845042408] [2022-07-12 03:58:34,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845042408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283018079] [2022-07-12 03:58:34,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:34,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:34,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:34,645 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) [2022-07-12 03:58:34,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 03:58:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:34,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:34,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:34,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283018079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:34,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:34,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-07-12 03:58:34,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973177503] [2022-07-12 03:58:34,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:34,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 03:58:34,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 03:58:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:58:34,978 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-07-12 03:58:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:35,563 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-07-12 03:58:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 03:58:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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 43 [2022-07-12 03:58:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:35,565 INFO L225 Difference]: With dead ends: 271 [2022-07-12 03:58:35,565 INFO L226 Difference]: Without dead ends: 240 [2022-07-12 03:58:35,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 03:58:35,565 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 155 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:35,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 195 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-12 03:58:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2022-07-12 03:58:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:35,664 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:35,664 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:35,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-07-12 03:58:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:35,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:35,679 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:35,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:35,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 03:58:35,895 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2022-07-12 03:58:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:35,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441582676] [2022-07-12 03:58:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441582676] [2022-07-12 03:58:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441582676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414395881] [2022-07-12 03:58:36,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:36,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:36,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:36,084 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) [2022-07-12 03:58:36,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-12 03:58:36,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:36,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:36,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414395881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:36,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:36,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2022-07-12 03:58:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563882847] [2022-07-12 03:58:36,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:36,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 03:58:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 03:58:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 03:58:36,521 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:37,186 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2022-07-12 03:58:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 03:58:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2022-07-12 03:58:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:37,187 INFO L225 Difference]: With dead ends: 304 [2022-07-12 03:58:37,187 INFO L226 Difference]: Without dead ends: 273 [2022-07-12 03:58:37,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2022-07-12 03:58:37,188 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 218 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:37,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 227 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-12 03:58:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2022-07-12 03:58:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:37,233 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:37,233 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:37,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:37,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:37,234 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:37,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:37,437 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,SelfDestructingSolverStorable49 [2022-07-12 03:58:37,438 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2022-07-12 03:58:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:37,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998071208] [2022-07-12 03:58:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:37,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998071208] [2022-07-12 03:58:37,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998071208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:37,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248524667] [2022-07-12 03:58:37,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:37,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:37,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:37,596 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) [2022-07-12 03:58:37,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 03:58:37,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 03:58:37,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:37,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:37,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248524667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:37,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:37,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-07-12 03:58:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72135185] [2022-07-12 03:58:37,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 03:58:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 03:58:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 03:58:37,967 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:38,732 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2022-07-12 03:58:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 03:58:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 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 43 [2022-07-12 03:58:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:38,734 INFO L225 Difference]: With dead ends: 336 [2022-07-12 03:58:38,734 INFO L226 Difference]: Without dead ends: 305 [2022-07-12 03:58:38,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 03:58:38,735 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:38,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 206 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-12 03:58:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2022-07-12 03:58:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:38,782 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:38,782 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:38,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:38,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:38,783 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:38,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:39,000 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,SelfDestructingSolverStorable50 [2022-07-12 03:58:39,001 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2022-07-12 03:58:39,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:39,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227586313] [2022-07-12 03:58:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:39,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:39,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227586313] [2022-07-12 03:58:39,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227586313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921939738] [2022-07-12 03:58:39,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:39,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:39,216 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) [2022-07-12 03:58:39,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-12 03:58:39,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:39,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:39,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921939738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:39,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:39,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-07-12 03:58:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000933067] [2022-07-12 03:58:39,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:39,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 03:58:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 03:58:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 03:58:39,659 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:40,402 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2022-07-12 03:58:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 03:58:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 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 43 [2022-07-12 03:58:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:40,403 INFO L225 Difference]: With dead ends: 367 [2022-07-12 03:58:40,403 INFO L226 Difference]: Without dead ends: 336 [2022-07-12 03:58:40,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 03:58:40,404 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 206 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:40,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 254 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-12 03:58:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2022-07-12 03:58:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-12 03:58:40,456 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-07-12 03:58:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:40,457 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-12 03:58:40,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-12 03:58:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:40,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:40,457 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:40,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:40,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:40,674 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2022-07-12 03:58:40,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:40,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142147241] [2022-07-12 03:58:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:40,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142147241] [2022-07-12 03:58:40,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142147241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567497414] [2022-07-12 03:58:40,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:40,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:40,837 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) [2022-07-12 03:58:40,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-12 03:58:40,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:41,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:41,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567497414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:41,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:41,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2022-07-12 03:58:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99442252] [2022-07-12 03:58:41,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:41,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 03:58:41,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 03:58:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 03:58:41,234 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:41,929 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2022-07-12 03:58:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 03:58:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 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 43 [2022-07-12 03:58:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:41,931 INFO L225 Difference]: With dead ends: 400 [2022-07-12 03:58:41,931 INFO L226 Difference]: Without dead ends: 369 [2022-07-12 03:58:41,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 03:58:41,931 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:41,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 180 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-12 03:58:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2022-07-12 03:58:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 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) [2022-07-12 03:58:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-12 03:58:41,981 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2022-07-12 03:58:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:41,981 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-12 03:58:41,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-12 03:58:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 03:58:41,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:41,982 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:41,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-12 03:58:42,186 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,SelfDestructingSolverStorable52 [2022-07-12 03:58:42,186 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2022-07-12 03:58:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:42,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471448343] [2022-07-12 03:58:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:42,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:42,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471448343] [2022-07-12 03:58:42,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471448343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682199682] [2022-07-12 03:58:42,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:42,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:42,291 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) [2022-07-12 03:58:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-12 03:58:42,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:42,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:42,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 03:58:42,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:42,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:42,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682199682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:42,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:42,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-07-12 03:58:42,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690782262] [2022-07-12 03:58:42,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:42,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 03:58:42,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 03:58:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-12 03:58:42,443 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:42,636 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-07-12 03:58:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 03:58:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 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 44 [2022-07-12 03:58:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:42,637 INFO L225 Difference]: With dead ends: 74 [2022-07-12 03:58:42,637 INFO L226 Difference]: Without dead ends: 72 [2022-07-12 03:58:42,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-07-12 03:58:42,638 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:42,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 154 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-12 03:58:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-07-12 03:58:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-12 03:58:42,736 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2022-07-12 03:58:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:42,736 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-12 03:58:42,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-12 03:58:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:42,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:42,737 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:42,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-12 03:58:42,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:42,959 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:42,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2022-07-12 03:58:42,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671645684] [2022-07-12 03:58:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:42,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:43,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671645684] [2022-07-12 03:58:43,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671645684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992768205] [2022-07-12 03:58:43,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:43,189 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) [2022-07-12 03:58:43,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-12 03:58:43,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-12 03:58:43,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:43,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:43,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:43,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992768205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:43,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:43,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-12 03:58:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533189446] [2022-07-12 03:58:43,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:43,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 03:58:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 03:58:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 03:58:43,829 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 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) [2022-07-12 03:58:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:44,291 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-07-12 03:58:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 03:58:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 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 47 [2022-07-12 03:58:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:44,292 INFO L225 Difference]: With dead ends: 142 [2022-07-12 03:58:44,293 INFO L226 Difference]: Without dead ends: 108 [2022-07-12 03:58:44,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 03:58:44,293 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:44,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-12 03:58:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-07-12 03:58:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:44,415 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:44,415 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 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) [2022-07-12 03:58:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:44,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:44,416 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:44,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:44,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:44,638 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2022-07-12 03:58:44,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:44,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049060197] [2022-07-12 03:58:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:44,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:44,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049060197] [2022-07-12 03:58:44,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049060197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:44,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951219280] [2022-07-12 03:58:44,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:44,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:44,847 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) [2022-07-12 03:58:44,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-12 03:58:44,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-12 03:58:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:44,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:45,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:45,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951219280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:45,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:45,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2022-07-12 03:58:45,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366554604] [2022-07-12 03:58:45,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:45,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 03:58:45,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 03:58:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 03:58:45,408 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 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) [2022-07-12 03:58:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:46,010 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2022-07-12 03:58:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 03:58:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 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) Word has length 47 [2022-07-12 03:58:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:46,010 INFO L225 Difference]: With dead ends: 183 [2022-07-12 03:58:46,011 INFO L226 Difference]: Without dead ends: 149 [2022-07-12 03:58:46,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 03:58:46,012 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:46,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-12 03:58:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2022-07-12 03:58:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:46,084 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:46,085 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:46,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 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) [2022-07-12 03:58:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:46,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:46,085 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:46,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:46,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:46,292 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2022-07-12 03:58:46,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734312818] [2022-07-12 03:58:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:46,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734312818] [2022-07-12 03:58:46,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734312818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095577775] [2022-07-12 03:58:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:46,488 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) [2022-07-12 03:58:46,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-12 03:58:46,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 03:58:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:46,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095577775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:46,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:46,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2022-07-12 03:58:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276429302] [2022-07-12 03:58:46,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 03:58:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 03:58:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 03:58:46,987 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:47,564 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2022-07-12 03:58:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 03:58:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 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 47 [2022-07-12 03:58:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:47,565 INFO L225 Difference]: With dead ends: 223 [2022-07-12 03:58:47,565 INFO L226 Difference]: Without dead ends: 189 [2022-07-12 03:58:47,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 03:58:47,566 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:47,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 232 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-12 03:58:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2022-07-12 03:58:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:47,647 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:47,647 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:47,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:47,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:47,648 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:47,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:47,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:47,866 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2022-07-12 03:58:47,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:47,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436447100] [2022-07-12 03:58:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:47,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:48,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436447100] [2022-07-12 03:58:48,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436447100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:48,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947931265] [2022-07-12 03:58:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:48,071 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) [2022-07-12 03:58:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-12 03:58:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:48,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:48,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947931265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:48,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:48,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2022-07-12 03:58:48,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209661847] [2022-07-12 03:58:48,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:48,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 03:58:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 03:58:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 03:58:48,595 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 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) [2022-07-12 03:58:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:49,668 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2022-07-12 03:58:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 03:58:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 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) Word has length 47 [2022-07-12 03:58:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:49,669 INFO L225 Difference]: With dead ends: 262 [2022-07-12 03:58:49,669 INFO L226 Difference]: Without dead ends: 228 [2022-07-12 03:58:49,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 03:58:49,670 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 257 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 03:58:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-12 03:58:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2022-07-12 03:58:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:49,743 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:49,743 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:49,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 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) [2022-07-12 03:58:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:49,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:49,744 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:49,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:49,960 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,SelfDestructingSolverStorable57 [2022-07-12 03:58:49,961 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2022-07-12 03:58:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:49,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331155211] [2022-07-12 03:58:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:50,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:50,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331155211] [2022-07-12 03:58:50,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331155211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:50,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689714101] [2022-07-12 03:58:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:50,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:50,189 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) [2022-07-12 03:58:50,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-12 03:58:50,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:50,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:50,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689714101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:50,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:50,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-07-12 03:58:50,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787316420] [2022-07-12 03:58:50,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:50,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 03:58:50,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:50,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 03:58:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 03:58:50,633 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:51,575 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2022-07-12 03:58:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 03:58:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 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 47 [2022-07-12 03:58:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:51,576 INFO L225 Difference]: With dead ends: 300 [2022-07-12 03:58:51,576 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 03:58:51,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 03:58:51,577 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 158 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:51,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 256 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 03:58:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2022-07-12 03:58:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:51,647 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:51,648 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:51,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:51,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:51,648 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:51,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:51,865 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,SelfDestructingSolverStorable58 [2022-07-12 03:58:51,865 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2022-07-12 03:58:51,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:51,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564210541] [2022-07-12 03:58:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:51,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:52,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:52,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564210541] [2022-07-12 03:58:52,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564210541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:52,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752526524] [2022-07-12 03:58:52,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:52,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:52,060 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) [2022-07-12 03:58:52,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-12 03:58:52,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-12 03:58:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:52,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:52,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752526524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:52,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:52,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2022-07-12 03:58:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233749980] [2022-07-12 03:58:52,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:52,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 03:58:52,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 03:58:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:58:52,562 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:53,544 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2022-07-12 03:58:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 03:58:53,544 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2022-07-12 03:58:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:53,545 INFO L225 Difference]: With dead ends: 337 [2022-07-12 03:58:53,545 INFO L226 Difference]: Without dead ends: 303 [2022-07-12 03:58:53,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 03:58:53,546 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:53,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 236 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-12 03:58:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2022-07-12 03:58:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:53,631 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:53,631 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:53,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:53,632 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:53,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:53,834 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,SelfDestructingSolverStorable59 [2022-07-12 03:58:53,835 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:53,835 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2022-07-12 03:58:53,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:53,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091203233] [2022-07-12 03:58:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:53,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:54,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:54,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091203233] [2022-07-12 03:58:54,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091203233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:54,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154931338] [2022-07-12 03:58:54,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:54,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:54,078 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) [2022-07-12 03:58:54,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-12 03:58:54,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:54,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:54,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154931338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:54,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:54,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2022-07-12 03:58:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526188430] [2022-07-12 03:58:54,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 03:58:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 03:58:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 03:58:54,440 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:55,493 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2022-07-12 03:58:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 03:58:55,493 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 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 47 [2022-07-12 03:58:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:55,494 INFO L225 Difference]: With dead ends: 373 [2022-07-12 03:58:55,494 INFO L226 Difference]: Without dead ends: 339 [2022-07-12 03:58:55,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 03:58:55,519 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:55,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 247 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:58:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-12 03:58:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2022-07-12 03:58:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:55,592 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:55,592 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:55,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:55,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:55,593 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:55,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:55,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:55,807 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2022-07-12 03:58:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:55,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072634278] [2022-07-12 03:58:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072634278] [2022-07-12 03:58:55,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072634278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809617769] [2022-07-12 03:58:55,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:55,972 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) [2022-07-12 03:58:55,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-12 03:58:56,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-12 03:58:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:56,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:56,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809617769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:56,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:56,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2022-07-12 03:58:56,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414581659] [2022-07-12 03:58:56,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:56,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 03:58:56,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 03:58:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 03:58:56,303 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:57,214 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2022-07-12 03:58:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 03:58:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 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 47 [2022-07-12 03:58:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:57,217 INFO L225 Difference]: With dead ends: 408 [2022-07-12 03:58:57,217 INFO L226 Difference]: Without dead ends: 374 [2022-07-12 03:58:57,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 03:58:57,217 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 221 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:57,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 265 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-12 03:58:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2022-07-12 03:58:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:57,292 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:57,292 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:57,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:57,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:57,293 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:57,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:57,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:57,510 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:57,510 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2022-07-12 03:58:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:57,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278688873] [2022-07-12 03:58:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278688873] [2022-07-12 03:58:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278688873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932667641] [2022-07-12 03:58:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:57,649 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) [2022-07-12 03:58:57,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-12 03:58:57,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 03:58:57,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:57,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932667641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:57,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:57,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2022-07-12 03:58:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890303586] [2022-07-12 03:58:57,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:57,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 03:58:57,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 03:58:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:58:57,952 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:58,889 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2022-07-12 03:58:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 03:58:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 47 [2022-07-12 03:58:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:58,890 INFO L225 Difference]: With dead ends: 442 [2022-07-12 03:58:58,890 INFO L226 Difference]: Without dead ends: 408 [2022-07-12 03:58:58,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 03:58:58,891 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 277 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:58,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 236 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-07-12 03:58:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2022-07-12 03:58:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 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) [2022-07-12 03:58:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-12 03:58:58,966 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-07-12 03:58:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:58,966 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-12 03:58:58,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-12 03:58:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:58,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:58,967 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:58,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-12 03:58:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:59,180 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2022-07-12 03:58:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:59,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997739874] [2022-07-12 03:58:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997739874] [2022-07-12 03:58:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997739874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142218832] [2022-07-12 03:58:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:59,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:59,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:59,360 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) [2022-07-12 03:58:59,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-12 03:58:59,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-12 03:58:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:59,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:59,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:59,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142218832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:59,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:59,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2022-07-12 03:58:59,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880527581] [2022-07-12 03:58:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:59,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 03:58:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 03:58:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 03:58:59,798 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 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) [2022-07-12 03:59:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:00,826 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2022-07-12 03:59:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 03:59:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 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) Word has length 47 [2022-07-12 03:59:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:00,828 INFO L225 Difference]: With dead ends: 478 [2022-07-12 03:59:00,828 INFO L226 Difference]: Without dead ends: 444 [2022-07-12 03:59:00,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 03:59:00,829 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 394 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:00,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 211 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-12 03:59:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2022-07-12 03:59:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-07-12 03:59:00,919 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2022-07-12 03:59:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:00,919 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-07-12 03:59:00,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 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) [2022-07-12 03:59:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-07-12 03:59:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 03:59:00,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:00,924 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:00,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:01,128 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,SelfDestructingSolverStorable63 [2022-07-12 03:59:01,129 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2022-07-12 03:59:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:01,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765851092] [2022-07-12 03:59:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:01,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765851092] [2022-07-12 03:59:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765851092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:01,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301922033] [2022-07-12 03:59:01,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:01,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:01,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:01,218 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) [2022-07-12 03:59:01,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-12 03:59:01,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 03:59:01,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 03:59:01,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:01,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:01,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301922033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:01,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:01,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-07-12 03:59:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654336806] [2022-07-12 03:59:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 03:59:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 03:59:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-07-12 03:59:01,372 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:01,607 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-07-12 03:59:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 03:59:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 48 [2022-07-12 03:59:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:01,608 INFO L225 Difference]: With dead ends: 80 [2022-07-12 03:59:01,608 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 03:59:01,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-07-12 03:59:01,608 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 62 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:01,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 182 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 03:59:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-12 03:59:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-07-12 03:59:01,690 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2022-07-12 03:59:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:01,691 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-07-12 03:59:01,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-07-12 03:59:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:01,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:01,691 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:01,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-12 03:59:01,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:01,908 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2022-07-12 03:59:01,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:01,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090527344] [2022-07-12 03:59:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090527344] [2022-07-12 03:59:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090527344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061761052] [2022-07-12 03:59:02,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:02,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:02,136 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) [2022-07-12 03:59:02,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-12 03:59:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:02,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:02,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:02,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:02,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061761052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:02,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:02,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-12 03:59:02,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079113857] [2022-07-12 03:59:02,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:02,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 03:59:02,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 03:59:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:59:02,792 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:03,340 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-07-12 03:59:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 03:59:03,341 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 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 51 [2022-07-12 03:59:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:03,341 INFO L225 Difference]: With dead ends: 155 [2022-07-12 03:59:03,341 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 03:59:03,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 03:59:03,342 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:03,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 188 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 03:59:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2022-07-12 03:59:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:03,437 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:03,438 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:03,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:03,438 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:03,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-12 03:59:03,651 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,SelfDestructingSolverStorable65 [2022-07-12 03:59:03,652 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2022-07-12 03:59:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:03,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236589521] [2022-07-12 03:59:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:03,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:03,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236589521] [2022-07-12 03:59:03,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236589521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:03,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042926029] [2022-07-12 03:59:03,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:03,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:03,915 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) [2022-07-12 03:59:03,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-12 03:59:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:03,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:04,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:04,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042926029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:04,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:04,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2022-07-12 03:59:04,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238042734] [2022-07-12 03:59:04,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:04,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 03:59:04,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 03:59:04,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 03:59:04,542 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 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) [2022-07-12 03:59:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:05,308 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2022-07-12 03:59:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 03:59:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 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) Word has length 51 [2022-07-12 03:59:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:05,309 INFO L225 Difference]: With dead ends: 200 [2022-07-12 03:59:05,309 INFO L226 Difference]: Without dead ends: 163 [2022-07-12 03:59:05,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 03:59:05,311 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:05,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 215 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-12 03:59:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2022-07-12 03:59:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:05,421 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:05,421 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:05,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 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) [2022-07-12 03:59:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:05,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:05,422 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:05,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:05,639 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,SelfDestructingSolverStorable66 [2022-07-12 03:59:05,640 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2022-07-12 03:59:05,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:05,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708797793] [2022-07-12 03:59:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:05,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:05,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708797793] [2022-07-12 03:59:05,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708797793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053237344] [2022-07-12 03:59:05,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:05,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:05,884 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) [2022-07-12 03:59:05,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-12 03:59:05,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:05,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:06,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053237344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:06,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:06,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2022-07-12 03:59:06,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743633697] [2022-07-12 03:59:06,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 03:59:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 03:59:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 03:59:06,508 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:07,528 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2022-07-12 03:59:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 03:59:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 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 51 [2022-07-12 03:59:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:07,529 INFO L225 Difference]: With dead ends: 244 [2022-07-12 03:59:07,530 INFO L226 Difference]: Without dead ends: 207 [2022-07-12 03:59:07,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2022-07-12 03:59:07,530 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:07,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 280 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-12 03:59:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2022-07-12 03:59:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:07,653 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:07,653 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:07,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:07,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:07,654 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:07,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-12 03:59:07,855 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,SelfDestructingSolverStorable67 [2022-07-12 03:59:07,855 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2022-07-12 03:59:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:07,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954982225] [2022-07-12 03:59:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:08,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954982225] [2022-07-12 03:59:08,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954982225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:08,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890493064] [2022-07-12 03:59:08,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:08,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:08,069 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) [2022-07-12 03:59:08,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-12 03:59:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 03:59:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890493064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:08,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:08,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2022-07-12 03:59:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675195697] [2022-07-12 03:59:08,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 03:59:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 03:59:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 03:59:08,696 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:09,924 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2022-07-12 03:59:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 03:59:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 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 51 [2022-07-12 03:59:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:09,925 INFO L225 Difference]: With dead ends: 287 [2022-07-12 03:59:09,925 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 03:59:09,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 03:59:09,926 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:09,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 258 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 03:59:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2022-07-12 03:59:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:10,040 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:10,040 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:10,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:10,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:10,040 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:10,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:10,257 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,SelfDestructingSolverStorable68 [2022-07-12 03:59:10,257 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2022-07-12 03:59:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602419565] [2022-07-12 03:59:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:10,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602419565] [2022-07-12 03:59:10,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602419565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114571537] [2022-07-12 03:59:10,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:10,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:10,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:10,470 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) [2022-07-12 03:59:10,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-12 03:59:10,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:11,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:11,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114571537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:11,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:11,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-07-12 03:59:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262488137] [2022-07-12 03:59:11,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:11,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 03:59:11,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 03:59:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 03:59:11,252 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:12,572 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2022-07-12 03:59:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 03:59:12,572 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2022-07-12 03:59:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:12,573 INFO L225 Difference]: With dead ends: 329 [2022-07-12 03:59:12,573 INFO L226 Difference]: Without dead ends: 292 [2022-07-12 03:59:12,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 03:59:12,574 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:12,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 302 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-12 03:59:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2022-07-12 03:59:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:12,695 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:12,696 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:12,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:12,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:12,696 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:12,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:12,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:12,911 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2022-07-12 03:59:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170370702] [2022-07-12 03:59:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170370702] [2022-07-12 03:59:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170370702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715700974] [2022-07-12 03:59:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:13,124 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) [2022-07-12 03:59:13,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-12 03:59:13,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-12 03:59:13,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:13,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:13,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715700974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:13,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:13,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2022-07-12 03:59:13,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158816522] [2022-07-12 03:59:13,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:13,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 03:59:13,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:13,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 03:59:13,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 03:59:13,641 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 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) [2022-07-12 03:59:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:14,804 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2022-07-12 03:59:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-12 03:59:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 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 51 [2022-07-12 03:59:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:14,805 INFO L225 Difference]: With dead ends: 370 [2022-07-12 03:59:14,805 INFO L226 Difference]: Without dead ends: 333 [2022-07-12 03:59:14,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2022-07-12 03:59:14,806 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 197 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:14,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 270 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-12 03:59:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2022-07-12 03:59:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:14,920 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:14,921 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 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) [2022-07-12 03:59:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:14,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:14,921 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:14,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-07-12 03:59:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:15,135 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2022-07-12 03:59:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:15,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487927362] [2022-07-12 03:59:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:15,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487927362] [2022-07-12 03:59:15,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487927362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309123263] [2022-07-12 03:59:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:15,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:15,286 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) [2022-07-12 03:59:15,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-12 03:59:15,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-12 03:59:15,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:15,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:15,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309123263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:15,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:15,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2022-07-12 03:59:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527239469] [2022-07-12 03:59:15,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 03:59:15,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 03:59:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 03:59:15,691 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:16,907 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2022-07-12 03:59:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 03:59:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 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 51 [2022-07-12 03:59:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:16,909 INFO L225 Difference]: With dead ends: 410 [2022-07-12 03:59:16,909 INFO L226 Difference]: Without dead ends: 373 [2022-07-12 03:59:16,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 03:59:16,910 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 198 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:16,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 238 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-12 03:59:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2022-07-12 03:59:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:17,026 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:17,027 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:17,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:17,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:17,027 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:17,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:17,240 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2022-07-12 03:59:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:17,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699194045] [2022-07-12 03:59:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:17,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699194045] [2022-07-12 03:59:17,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699194045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:17,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382709719] [2022-07-12 03:59:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:17,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:17,445 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) [2022-07-12 03:59:17,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-12 03:59:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:17,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:17,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382709719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:17,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2022-07-12 03:59:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894580180] [2022-07-12 03:59:17,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:17,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 03:59:17,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 03:59:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 03:59:17,984 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2022-07-12 03:59:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:19,275 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2022-07-12 03:59:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-12 03:59:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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 51 [2022-07-12 03:59:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:19,276 INFO L225 Difference]: With dead ends: 449 [2022-07-12 03:59:19,276 INFO L226 Difference]: Without dead ends: 412 [2022-07-12 03:59:19,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 03:59:19,278 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 300 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:19,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 281 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-07-12 03:59:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2022-07-12 03:59:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:19,391 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:19,391 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:19,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2022-07-12 03:59:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:19,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:19,392 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:19,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:19,608 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,SelfDestructingSolverStorable72 [2022-07-12 03:59:19,609 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2022-07-12 03:59:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:19,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428808384] [2022-07-12 03:59:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:19,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428808384] [2022-07-12 03:59:19,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428808384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:19,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635036218] [2022-07-12 03:59:19,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:19,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:19,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:19,860 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) [2022-07-12 03:59:19,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-12 03:59:19,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:19,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:20,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:20,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635036218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:20,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:20,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-07-12 03:59:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516161654] [2022-07-12 03:59:20,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 03:59:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 03:59:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 03:59:20,281 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) [2022-07-12 03:59:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:21,716 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2022-07-12 03:59:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 03:59:21,716 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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 51 [2022-07-12 03:59:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:21,717 INFO L225 Difference]: With dead ends: 487 [2022-07-12 03:59:21,717 INFO L226 Difference]: Without dead ends: 450 [2022-07-12 03:59:21,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2022-07-12 03:59:21,718 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:21,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 323 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-12 03:59:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2022-07-12 03:59:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:21,843 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:21,843 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:21,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) [2022-07-12 03:59:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:21,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:21,844 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:21,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:22,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:22,060 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2022-07-12 03:59:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:22,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566461263] [2022-07-12 03:59:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:22,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566461263] [2022-07-12 03:59:22,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566461263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788198801] [2022-07-12 03:59:22,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:22,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:22,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:22,187 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) [2022-07-12 03:59:22,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-12 03:59:22,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 03:59:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:22,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:22,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788198801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:22,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:22,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2022-07-12 03:59:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245900864] [2022-07-12 03:59:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 03:59:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 03:59:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:59:22,517 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 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) [2022-07-12 03:59:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:24,069 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2022-07-12 03:59:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 03:59:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 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) Word has length 51 [2022-07-12 03:59:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:24,071 INFO L225 Difference]: With dead ends: 524 [2022-07-12 03:59:24,071 INFO L226 Difference]: Without dead ends: 487 [2022-07-12 03:59:24,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 03:59:24,076 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 374 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:24,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 287 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-07-12 03:59:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2022-07-12 03:59:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 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) [2022-07-12 03:59:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 03:59:24,195 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-07-12 03:59:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:24,195 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 03:59:24,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 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) [2022-07-12 03:59:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 03:59:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:59:24,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:24,196 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:24,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:24,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:24,409 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2022-07-12 03:59:24,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:24,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123580216] [2022-07-12 03:59:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123580216] [2022-07-12 03:59:24,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123580216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109236623] [2022-07-12 03:59:24,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:24,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:24,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:24,553 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) [2022-07-12 03:59:24,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-12 03:59:24,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:24,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:59:24,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:24,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:24,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109236623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:24,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:24,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2022-07-12 03:59:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925157018] [2022-07-12 03:59:24,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 03:59:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 03:59:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 03:59:24,934 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:26,326 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2022-07-12 03:59:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 03:59:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 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 51 [2022-07-12 03:59:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:26,328 INFO L225 Difference]: With dead ends: 563 [2022-07-12 03:59:26,328 INFO L226 Difference]: Without dead ends: 526 [2022-07-12 03:59:26,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 03:59:26,328 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 326 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:26,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 266 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-12 03:59:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2022-07-12 03:59:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 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) [2022-07-12 03:59:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-07-12 03:59:26,453 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2022-07-12 03:59:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:26,453 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-07-12 03:59:26,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-07-12 03:59:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 03:59:26,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:26,454 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:26,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-07-12 03:59:26,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-07-12 03:59:26,664 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2022-07-12 03:59:26,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:26,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847534968] [2022-07-12 03:59:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:26,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:26,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:26,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847534968] [2022-07-12 03:59:26,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847534968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:26,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380655754] [2022-07-12 03:59:26,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:26,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:26,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:26,751 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:26,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-12 03:59:26,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 03:59:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:26,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:26,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380655754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:26,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:26,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-07-12 03:59:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114616152] [2022-07-12 03:59:26,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:26,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 03:59:26,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 03:59:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-07-12 03:59:26,861 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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) [2022-07-12 03:59:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:27,098 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-07-12 03:59:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:59:27,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 52 [2022-07-12 03:59:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:27,099 INFO L225 Difference]: With dead ends: 86 [2022-07-12 03:59:27,099 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 03:59:27,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-07-12 03:59:27,099 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:27,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 168 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 03:59:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-07-12 03:59:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-07-12 03:59:27,241 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2022-07-12 03:59:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:27,241 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-07-12 03:59:27,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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) [2022-07-12 03:59:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-07-12 03:59:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:27,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:27,242 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:27,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:27,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-07-12 03:59:27,458 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2022-07-12 03:59:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29696650] [2022-07-12 03:59:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:27,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:27,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29696650] [2022-07-12 03:59:27,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29696650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220002431] [2022-07-12 03:59:27,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:27,624 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:27,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-12 03:59:27,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-12 03:59:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:28,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:28,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220002431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:28,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:28,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-07-12 03:59:28,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470058517] [2022-07-12 03:59:28,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:28,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 03:59:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 03:59:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 03:59:28,300 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:28,983 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-07-12 03:59:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:59:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:28,984 INFO L225 Difference]: With dead ends: 168 [2022-07-12 03:59:28,984 INFO L226 Difference]: Without dead ends: 128 [2022-07-12 03:59:28,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 03:59:28,985 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:28,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 218 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-12 03:59:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-07-12 03:59:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:29,126 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:29,126 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:29,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:29,127 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:29,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:29,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:29,343 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2022-07-12 03:59:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:29,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850965755] [2022-07-12 03:59:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:29,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850965755] [2022-07-12 03:59:29,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850965755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808804111] [2022-07-12 03:59:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:29,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:29,557 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:29,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-12 03:59:29,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:29,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:30,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:30,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808804111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:30,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:30,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2022-07-12 03:59:30,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010127409] [2022-07-12 03:59:30,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:30,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 03:59:30,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:30,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 03:59:30,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 03:59:30,246 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:31,135 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2022-07-12 03:59:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 03:59:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:31,136 INFO L225 Difference]: With dead ends: 217 [2022-07-12 03:59:31,136 INFO L226 Difference]: Without dead ends: 177 [2022-07-12 03:59:31,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2022-07-12 03:59:31,137 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:31,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 227 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-12 03:59:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2022-07-12 03:59:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:31,289 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:31,289 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:31,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:31,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:31,290 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:31,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:31,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:31,506 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2022-07-12 03:59:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:31,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500689172] [2022-07-12 03:59:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:31,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:31,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:31,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500689172] [2022-07-12 03:59:31,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500689172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:31,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81223260] [2022-07-12 03:59:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:31,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:31,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:31,697 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:31,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-12 03:59:31,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 03:59:31,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:31,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:31,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:32,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:32,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81223260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:32,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:32,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2022-07-12 03:59:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720891830] [2022-07-12 03:59:32,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:32,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-12 03:59:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-12 03:59:32,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 03:59:32,213 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:33,301 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-07-12 03:59:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 03:59:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:33,302 INFO L225 Difference]: With dead ends: 265 [2022-07-12 03:59:33,302 INFO L226 Difference]: Without dead ends: 225 [2022-07-12 03:59:33,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 03:59:33,303 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:33,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 304 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-12 03:59:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2022-07-12 03:59:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:33,462 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:33,462 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:33,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:33,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:33,463 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:33,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:33,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-07-12 03:59:33,679 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:33,680 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2022-07-12 03:59:33,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:33,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382403077] [2022-07-12 03:59:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:33,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:33,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382403077] [2022-07-12 03:59:33,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382403077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639293711] [2022-07-12 03:59:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:33,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:33,861 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:33,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-12 03:59:33,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-12 03:59:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:34,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:34,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639293711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:34,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:34,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2022-07-12 03:59:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182189653] [2022-07-12 03:59:34,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:34,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 03:59:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 03:59:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 03:59:34,486 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:35,834 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2022-07-12 03:59:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 03:59:35,835 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:35,835 INFO L225 Difference]: With dead ends: 312 [2022-07-12 03:59:35,836 INFO L226 Difference]: Without dead ends: 272 [2022-07-12 03:59:35,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3878 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 03:59:35,836 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:35,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 286 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-12 03:59:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2022-07-12 03:59:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:36,007 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:36,007 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:36,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:36,007 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:36,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:36,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:36,225 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2022-07-12 03:59:36,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:36,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919537578] [2022-07-12 03:59:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:36,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919537578] [2022-07-12 03:59:36,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919537578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:36,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483369631] [2022-07-12 03:59:36,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:36,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:36,420 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:36,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-12 03:59:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:36,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483369631] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:36,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:36,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-07-12 03:59:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099976501] [2022-07-12 03:59:36,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:36,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 03:59:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 03:59:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:59:36,856 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:38,436 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2022-07-12 03:59:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 03:59:38,436 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:38,437 INFO L225 Difference]: With dead ends: 358 [2022-07-12 03:59:38,437 INFO L226 Difference]: Without dead ends: 318 [2022-07-12 03:59:38,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2022-07-12 03:59:38,438 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:38,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 331 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-12 03:59:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2022-07-12 03:59:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:38,640 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:38,640 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:38,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:38,641 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:38,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-07-12 03:59:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:38,860 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2022-07-12 03:59:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:38,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641265790] [2022-07-12 03:59:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:39,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641265790] [2022-07-12 03:59:39,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641265790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421270874] [2022-07-12 03:59:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:39,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:39,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:39,135 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:39,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-12 03:59:39,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:39,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:39,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:39,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:39,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421270874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:39,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:39,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2022-07-12 03:59:39,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175815028] [2022-07-12 03:59:39,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 03:59:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 03:59:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 03:59:39,768 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 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) [2022-07-12 03:59:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:41,491 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2022-07-12 03:59:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 03:59:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 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) Word has length 55 [2022-07-12 03:59:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:41,493 INFO L225 Difference]: With dead ends: 403 [2022-07-12 03:59:41,493 INFO L226 Difference]: Without dead ends: 363 [2022-07-12 03:59:41,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4385 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 03:59:41,494 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:41,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 300 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-12 03:59:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2022-07-12 03:59:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:41,655 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:41,655 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:41,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 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) [2022-07-12 03:59:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:41,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:41,656 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:41,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:41,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-07-12 03:59:41,870 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2022-07-12 03:59:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:41,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988305967] [2022-07-12 03:59:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:41,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988305967] [2022-07-12 03:59:42,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988305967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:42,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492135856] [2022-07-12 03:59:42,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:42,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:42,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:42,084 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:42,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-12 03:59:42,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-12 03:59:42,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:42,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:42,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:42,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492135856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:42,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:42,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2022-07-12 03:59:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12944912] [2022-07-12 03:59:42,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:42,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 03:59:42,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 03:59:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 03:59:42,649 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:44,683 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2022-07-12 03:59:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 03:59:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:44,685 INFO L225 Difference]: With dead ends: 447 [2022-07-12 03:59:44,685 INFO L226 Difference]: Without dead ends: 407 [2022-07-12 03:59:44,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 03:59:44,686 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 211 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:44,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 324 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-12 03:59:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2022-07-12 03:59:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:44,853 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:44,853 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:44,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:44,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:44,854 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:44,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:45,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:45,070 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2022-07-12 03:59:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:45,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117163221] [2022-07-12 03:59:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:45,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:45,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117163221] [2022-07-12 03:59:45,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117163221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:45,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010423361] [2022-07-12 03:59:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:45,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:45,309 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:45,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-12 03:59:45,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:45,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:45,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010423361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:45,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:45,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2022-07-12 03:59:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588110564] [2022-07-12 03:59:45,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:45,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 03:59:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 03:59:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 03:59:45,911 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:47,977 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2022-07-12 03:59:47,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 03:59:47,977 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:47,979 INFO L225 Difference]: With dead ends: 490 [2022-07-12 03:59:47,979 INFO L226 Difference]: Without dead ends: 450 [2022-07-12 03:59:47,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2022-07-12 03:59:47,980 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 238 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:47,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 290 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-12 03:59:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2022-07-12 03:59:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:48,146 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:48,146 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:48,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:48,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:48,147 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:48,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:48,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:48,363 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2022-07-12 03:59:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:48,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094539468] [2022-07-12 03:59:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:48,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094539468] [2022-07-12 03:59:48,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094539468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132607269] [2022-07-12 03:59:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:48,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:48,596 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:48,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-12 03:59:48,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 03:59:48,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:48,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:48,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:49,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132607269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:49,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:49,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2022-07-12 03:59:49,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422422566] [2022-07-12 03:59:49,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:49,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 03:59:49,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 03:59:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 03:59:49,085 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:51,113 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2022-07-12 03:59:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 03:59:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:51,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:51,114 INFO L225 Difference]: With dead ends: 532 [2022-07-12 03:59:51,114 INFO L226 Difference]: Without dead ends: 492 [2022-07-12 03:59:51,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3883 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 03:59:51,115 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 277 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:51,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 290 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-07-12 03:59:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2022-07-12 03:59:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:51,286 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:51,286 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:51,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:51,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:51,287 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:51,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:51,499 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2022-07-12 03:59:51,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:51,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147221161] [2022-07-12 03:59:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:51,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:51,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147221161] [2022-07-12 03:59:51,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147221161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:51,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728024520] [2022-07-12 03:59:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:51,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:51,743 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:51,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-12 03:59:51,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-12 03:59:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:51,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:52,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:52,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728024520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:52,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:52,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2022-07-12 03:59:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122053953] [2022-07-12 03:59:52,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:52,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 03:59:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 03:59:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 03:59:52,305 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 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) [2022-07-12 03:59:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:54,704 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2022-07-12 03:59:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 03:59:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 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) Word has length 55 [2022-07-12 03:59:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:54,706 INFO L225 Difference]: With dead ends: 573 [2022-07-12 03:59:54,706 INFO L226 Difference]: Without dead ends: 533 [2022-07-12 03:59:54,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 03:59:54,707 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 316 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:54,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 330 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-12 03:59:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2022-07-12 03:59:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:54,946 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:54,946 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:54,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 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) [2022-07-12 03:59:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:54,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:54,947 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:54,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:55,164 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2022-07-12 03:59:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:55,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330038582] [2022-07-12 03:59:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330038582] [2022-07-12 03:59:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330038582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831628032] [2022-07-12 03:59:55,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:55,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:55,396 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:55,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-12 03:59:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:55,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:55,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831628032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:55,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:55,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2022-07-12 03:59:55,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935340625] [2022-07-12 03:59:55,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 03:59:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 03:59:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 03:59:55,945 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:58,158 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-07-12 03:59:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 03:59:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 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 55 [2022-07-12 03:59:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:58,160 INFO L225 Difference]: With dead ends: 613 [2022-07-12 03:59:58,160 INFO L226 Difference]: Without dead ends: 573 [2022-07-12 03:59:58,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2022-07-12 03:59:58,161 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:58,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 310 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-12 03:59:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2022-07-12 03:59:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-07-12 03:59:58,360 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-07-12 03:59:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:58,361 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-07-12 03:59:58,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-07-12 03:59:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:59:58,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:58,361 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:58,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:58,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:58,578 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2022-07-12 03:59:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447381212] [2022-07-12 03:59:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447381212] [2022-07-12 03:59:58,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447381212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356830036] [2022-07-12 03:59:58,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:58,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:58,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:58,825 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 03:59:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-12 03:59:58,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 03:59:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:59:58,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:59,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356830036] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:59,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:59,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2022-07-12 03:59:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635148134] [2022-07-12 03:59:59,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 03:59:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 03:59:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 03:59:59,368 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:01,663 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2022-07-12 04:00:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 04:00:01,663 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 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 55 [2022-07-12 04:00:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:01,665 INFO L225 Difference]: With dead ends: 655 [2022-07-12 04:00:01,665 INFO L226 Difference]: Without dead ends: 615 [2022-07-12 04:00:01,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 04:00:01,665 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 365 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:01,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 247 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-07-12 04:00:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2022-07-12 04:00:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-07-12 04:00:01,846 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2022-07-12 04:00:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:01,846 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-07-12 04:00:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-07-12 04:00:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 04:00:01,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:01,846 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:01,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-12 04:00:02,063 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2022-07-12 04:00:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328003747] [2022-07-12 04:00:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:02,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:02,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328003747] [2022-07-12 04:00:02,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328003747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039582730] [2022-07-12 04:00:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:00:02,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:02,158 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:02,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-12 04:00:02,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:00:02,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 04:00:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:02,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:02,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039582730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:02,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:02,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-07-12 04:00:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430480071] [2022-07-12 04:00:02,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:00:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:00:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:00:02,336 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 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) [2022-07-12 04:00:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:02,707 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-07-12 04:00:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 04:00:02,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 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) Word has length 56 [2022-07-12 04:00:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:02,708 INFO L225 Difference]: With dead ends: 92 [2022-07-12 04:00:02,708 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 04:00:02,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-07-12 04:00:02,708 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:02,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 174 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 04:00:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-12 04:00:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 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) [2022-07-12 04:00:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-07-12 04:00:02,890 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2022-07-12 04:00:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:02,890 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-07-12 04:00:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 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) [2022-07-12 04:00:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-07-12 04:00:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:02,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:02,891 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:02,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-12 04:00:03,101 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2022-07-12 04:00:03,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:03,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888136732] [2022-07-12 04:00:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:03,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888136732] [2022-07-12 04:00:03,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888136732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583401202] [2022-07-12 04:00:03,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:00:03,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:03,393 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:03,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-12 04:00:03,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-12 04:00:03,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:04,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:04,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583401202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:04,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:04,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2022-07-12 04:00:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538359689] [2022-07-12 04:00:04,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-12 04:00:04,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-12 04:00:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 04:00:04,248 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:05,023 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2022-07-12 04:00:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 04:00:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:05,024 INFO L225 Difference]: With dead ends: 181 [2022-07-12 04:00:05,024 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 04:00:05,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 04:00:05,024 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 04:00:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2022-07-12 04:00:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:05,242 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:05,242 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:05,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:05,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:05,243 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:05,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-07-12 04:00:05,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:05,459 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:05,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:05,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2022-07-12 04:00:05,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:05,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394045213] [2022-07-12 04:00:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:05,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394045213] [2022-07-12 04:00:05,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394045213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622466893] [2022-07-12 04:00:05,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:05,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:05,633 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:05,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-12 04:00:05,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:06,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:06,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622466893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:06,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:06,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2022-07-12 04:00:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668736373] [2022-07-12 04:00:06,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-12 04:00:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-12 04:00:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 04:00:06,137 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 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) [2022-07-12 04:00:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:07,210 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2022-07-12 04:00:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 04:00:07,210 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 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) Word has length 59 [2022-07-12 04:00:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:07,211 INFO L225 Difference]: With dead ends: 234 [2022-07-12 04:00:07,211 INFO L226 Difference]: Without dead ends: 191 [2022-07-12 04:00:07,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2022-07-12 04:00:07,212 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:07,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 255 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-12 04:00:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2022-07-12 04:00:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:07,447 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:07,447 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:07,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 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) [2022-07-12 04:00:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:07,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:07,448 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:07,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:07,654 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2022-07-12 04:00:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:07,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956423432] [2022-07-12 04:00:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:07,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:07,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956423432] [2022-07-12 04:00:07,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956423432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597127609] [2022-07-12 04:00:07,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:07,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:07,920 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:07,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-12 04:00:07,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-12 04:00:07,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:08,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:08,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597127609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:08,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:08,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2022-07-12 04:00:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050787772] [2022-07-12 04:00:08,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:08,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 04:00:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 04:00:08,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:00:08,645 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:10,180 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2022-07-12 04:00:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 04:00:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:10,181 INFO L225 Difference]: With dead ends: 286 [2022-07-12 04:00:10,181 INFO L226 Difference]: Without dead ends: 243 [2022-07-12 04:00:10,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4023 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2022-07-12 04:00:10,182 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:10,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 238 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-12 04:00:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2022-07-12 04:00:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:10,412 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:10,412 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:10,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:10,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:10,413 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:10,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:10,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:10,629 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2022-07-12 04:00:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950982525] [2022-07-12 04:00:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:10,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:10,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:10,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950982525] [2022-07-12 04:00:10,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950982525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:10,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716028825] [2022-07-12 04:00:10,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:00:10,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:10,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:10,901 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:10,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-12 04:00:10,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:00:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:11,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:11,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716028825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:11,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:11,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2022-07-12 04:00:11,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530694331] [2022-07-12 04:00:11,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 04:00:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 04:00:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 04:00:11,630 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 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) [2022-07-12 04:00:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:13,402 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2022-07-12 04:00:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-12 04:00:13,402 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 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) Word has length 59 [2022-07-12 04:00:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:13,403 INFO L225 Difference]: With dead ends: 337 [2022-07-12 04:00:13,403 INFO L226 Difference]: Without dead ends: 294 [2022-07-12 04:00:13,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4610 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2022-07-12 04:00:13,404 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:13,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 236 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-12 04:00:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2022-07-12 04:00:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:13,662 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:13,662 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:13,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 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) [2022-07-12 04:00:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:13,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:13,663 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:13,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:13,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:13,879 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2022-07-12 04:00:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320500295] [2022-07-12 04:00:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320500295] [2022-07-12 04:00:14,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320500295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159278348] [2022-07-12 04:00:14,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:00:14,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:14,128 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:14,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-12 04:00:14,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-12 04:00:14,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:14,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:14,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159278348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:14,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:14,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-07-12 04:00:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692408989] [2022-07-12 04:00:14,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:14,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 04:00:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 04:00:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:00:14,839 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:16,941 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2022-07-12 04:00:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 04:00:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:16,942 INFO L225 Difference]: With dead ends: 387 [2022-07-12 04:00:16,942 INFO L226 Difference]: Without dead ends: 344 [2022-07-12 04:00:16,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5065 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2022-07-12 04:00:16,943 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 214 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:16,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 262 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-12 04:00:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2022-07-12 04:00:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:17,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:17,210 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:17,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:17,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:17,210 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:17,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-12 04:00:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:17,423 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2022-07-12 04:00:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:17,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575430339] [2022-07-12 04:00:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:17,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575430339] [2022-07-12 04:00:17,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575430339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:17,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063584393] [2022-07-12 04:00:17,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:00:17,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:17,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:17,669 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:17,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-12 04:00:17,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 04:00:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:18,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:18,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063584393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:18,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:18,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2022-07-12 04:00:18,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493932392] [2022-07-12 04:00:18,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:18,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 04:00:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 04:00:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:00:18,305 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 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) [2022-07-12 04:00:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:20,731 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2022-07-12 04:00:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-12 04:00:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 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) Word has length 59 [2022-07-12 04:00:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:20,732 INFO L225 Difference]: With dead ends: 436 [2022-07-12 04:00:20,732 INFO L226 Difference]: Without dead ends: 393 [2022-07-12 04:00:20,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2022-07-12 04:00:20,734 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 194 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:20,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 329 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-12 04:00:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2022-07-12 04:00:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:20,989 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:20,989 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:20,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 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) [2022-07-12 04:00:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:20,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:20,990 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:21,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-07-12 04:00:21,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-07-12 04:00:21,207 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2022-07-12 04:00:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803936520] [2022-07-12 04:00:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:21,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803936520] [2022-07-12 04:00:21,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803936520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705724292] [2022-07-12 04:00:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:00:21,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:21,495 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:21,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-12 04:00:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:21,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:21,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:22,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705724292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:22,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:22,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2022-07-12 04:00:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750543036] [2022-07-12 04:00:22,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-12 04:00:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-12 04:00:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 04:00:22,042 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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) [2022-07-12 04:00:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:24,858 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2022-07-12 04:00:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-12 04:00:24,858 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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 59 [2022-07-12 04:00:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:24,859 INFO L225 Difference]: With dead ends: 484 [2022-07-12 04:00:24,859 INFO L226 Difference]: Without dead ends: 441 [2022-07-12 04:00:24,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 04:00:24,861 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 230 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:24,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 262 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-07-12 04:00:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2022-07-12 04:00:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:25,134 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:25,134 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:25,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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) [2022-07-12 04:00:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:25,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:25,135 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:25,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:25,351 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2022-07-12 04:00:25,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:25,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504377199] [2022-07-12 04:00:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:25,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504377199] [2022-07-12 04:00:25,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504377199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840616] [2022-07-12 04:00:25,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:25,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:25,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:25,605 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:25,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-12 04:00:25,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:25,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:25,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:26,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:26,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:26,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:26,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2022-07-12 04:00:26,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917195011] [2022-07-12 04:00:26,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 04:00:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 04:00:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:00:26,168 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:28,905 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2022-07-12 04:00:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-12 04:00:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:28,907 INFO L225 Difference]: With dead ends: 531 [2022-07-12 04:00:28,907 INFO L226 Difference]: Without dead ends: 488 [2022-07-12 04:00:28,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2022-07-12 04:00:28,908 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 229 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:28,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 313 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-07-12 04:00:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2022-07-12 04:00:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:29,142 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:29,142 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:29,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:29,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:29,143 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:29,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-07-12 04:00:29,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:29,359 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2022-07-12 04:00:29,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:29,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262506855] [2022-07-12 04:00:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:29,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:29,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262506855] [2022-07-12 04:00:29,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262506855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154528696] [2022-07-12 04:00:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:29,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:29,623 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:29,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-12 04:00:29,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-12 04:00:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:30,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154528696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:30,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:30,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2022-07-12 04:00:30,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633057633] [2022-07-12 04:00:30,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 04:00:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 04:00:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 04:00:30,274 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:33,041 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2022-07-12 04:00:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-12 04:00:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:33,042 INFO L225 Difference]: With dead ends: 577 [2022-07-12 04:00:33,042 INFO L226 Difference]: Without dead ends: 534 [2022-07-12 04:00:33,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5095 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2022-07-12 04:00:33,043 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 268 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:33,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 335 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-07-12 04:00:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2022-07-12 04:00:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:33,291 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:33,291 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:33,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:33,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:33,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:33,294 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:33,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-07-12 04:00:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-07-12 04:00:33,511 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2022-07-12 04:00:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247124067] [2022-07-12 04:00:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:33,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247124067] [2022-07-12 04:00:33,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247124067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363826372] [2022-07-12 04:00:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:00:33,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:33,792 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:33,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-12 04:00:33,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:00:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:33,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:34,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363826372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:34,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:34,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2022-07-12 04:00:34,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086504191] [2022-07-12 04:00:34,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:34,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 04:00:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 04:00:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 04:00:34,370 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:37,354 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-07-12 04:00:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-12 04:00:37,354 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:37,355 INFO L225 Difference]: With dead ends: 622 [2022-07-12 04:00:37,355 INFO L226 Difference]: Without dead ends: 579 [2022-07-12 04:00:37,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4625 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2022-07-12 04:00:37,356 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 288 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 320 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-12 04:00:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2022-07-12 04:00:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:37,613 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:37,613 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:37,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:37,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:37,614 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:37,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:37,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:37,819 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2022-07-12 04:00:37,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236990341] [2022-07-12 04:00:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:37,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236990341] [2022-07-12 04:00:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236990341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531386219] [2022-07-12 04:00:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:00:38,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:38,071 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:38,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-12 04:00:38,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-12 04:00:38,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:38,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:38,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531386219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:38,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:38,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-07-12 04:00:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214064056] [2022-07-12 04:00:38,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 04:00:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 04:00:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:00:38,679 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:41,702 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2022-07-12 04:00:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 04:00:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:41,704 INFO L225 Difference]: With dead ends: 666 [2022-07-12 04:00:41,704 INFO L226 Difference]: Without dead ends: 623 [2022-07-12 04:00:41,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2022-07-12 04:00:41,705 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 491 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:41,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 297 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-12 04:00:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2022-07-12 04:00:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:41,966 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:41,966 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:41,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:41,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:41,967 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:41,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-07-12 04:00:42,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:42,171 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2022-07-12 04:00:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:42,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317949882] [2022-07-12 04:00:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317949882] [2022-07-12 04:00:42,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317949882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202408441] [2022-07-12 04:00:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:00:42,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:42,443 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:42,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-12 04:00:42,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 04:00:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:42,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:43,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202408441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:43,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:43,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2022-07-12 04:00:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772218152] [2022-07-12 04:00:43,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 04:00:43,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 04:00:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:00:43,079 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:46,237 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2022-07-12 04:00:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-12 04:00:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:46,258 INFO L225 Difference]: With dead ends: 709 [2022-07-12 04:00:46,258 INFO L226 Difference]: Without dead ends: 666 [2022-07-12 04:00:46,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2022-07-12 04:00:46,259 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 442 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:46,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 307 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-07-12 04:00:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2022-07-12 04:00:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-07-12 04:00:46,625 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-07-12 04:00:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:46,626 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-07-12 04:00:46,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-07-12 04:00:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:00:46,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:46,628 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:46,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-12 04:00:46,852 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2022-07-12 04:00:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:46,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496749441] [2022-07-12 04:00:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:47,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496749441] [2022-07-12 04:00:47,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496749441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561463747] [2022-07-12 04:00:47,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:00:47,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:47,119 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:47,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-12 04:00:47,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 04:00:47,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:47,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:00:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:47,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561463747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:47,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2022-07-12 04:00:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188285085] [2022-07-12 04:00:47,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:47,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 04:00:47,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 04:00:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:00:47,729 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:51,319 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2022-07-12 04:00:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 04:00:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 59 [2022-07-12 04:00:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:51,320 INFO L225 Difference]: With dead ends: 754 [2022-07-12 04:00:51,320 INFO L226 Difference]: Without dead ends: 711 [2022-07-12 04:00:51,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 04:00:51,321 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 561 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:51,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 263 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-07-12 04:00:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2022-07-12 04:00:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-07-12 04:00:51,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2022-07-12 04:00:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:51,683 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-07-12 04:00:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-07-12 04:00:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 04:00:51,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:51,684 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:51,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-07-12 04:00:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-12 04:00:51,903 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2022-07-12 04:00:51,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939366811] [2022-07-12 04:00:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:52,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:52,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939366811] [2022-07-12 04:00:52,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939366811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:52,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170023727] [2022-07-12 04:00:52,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:00:52,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:52,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:52,068 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:52,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-12 04:00:52,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 04:00:52,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 04:00:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:52,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:52,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170023727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:52,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:52,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-07-12 04:00:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126431112] [2022-07-12 04:00:52,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:52,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:00:52,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:00:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:00:52,288 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:52,751 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-07-12 04:00:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 04:00:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2022-07-12 04:00:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:52,752 INFO L225 Difference]: With dead ends: 98 [2022-07-12 04:00:52,752 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 04:00:52,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:00:52,752 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:52,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 164 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:00:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 04:00:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-07-12 04:00:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-07-12 04:00:53,034 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2022-07-12 04:00:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:53,034 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-07-12 04:00:53,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-07-12 04:00:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:00:53,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:53,035 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:53,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-12 04:00:53,243 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2022-07-12 04:00:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120017143] [2022-07-12 04:00:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:53,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:53,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120017143] [2022-07-12 04:00:53,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120017143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:53,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763778412] [2022-07-12 04:00:53,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:00:53,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:53,434 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:53,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-12 04:00:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:00:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:54,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763778412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:54,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-07-12 04:00:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657872098] [2022-07-12 04:00:54,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:54,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 04:00:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 04:00:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 04:00:54,422 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:55,770 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2022-07-12 04:00:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 04:00:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 63 [2022-07-12 04:00:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:55,770 INFO L225 Difference]: With dead ends: 194 [2022-07-12 04:00:55,770 INFO L226 Difference]: Without dead ends: 148 [2022-07-12 04:00:55,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 04:00:55,771 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:55,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 314 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-12 04:00:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2022-07-12 04:00:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:00:56,072 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:00:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:56,072 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:00:56,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:00:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:00:56,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:56,073 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:56,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:56,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:56,289 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:56,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2022-07-12 04:00:56,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:56,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907563263] [2022-07-12 04:00:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:56,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:56,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:56,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907563263] [2022-07-12 04:00:56,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907563263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:56,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697745940] [2022-07-12 04:00:56,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:00:56,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:56,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:56,598 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:56,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-12 04:00:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:00:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:57,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:57,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697745940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:57,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:57,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2022-07-12 04:00:57,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651838626] [2022-07-12 04:00:57,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:57,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 04:00:57,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 04:00:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 04:00:57,468 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 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) [2022-07-12 04:00:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:59,045 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2022-07-12 04:00:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 04:00:59,045 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 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) Word has length 63 [2022-07-12 04:00:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:59,046 INFO L225 Difference]: With dead ends: 251 [2022-07-12 04:00:59,046 INFO L226 Difference]: Without dead ends: 205 [2022-07-12 04:00:59,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3851 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 04:00:59,047 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 293 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:59,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-12 04:00:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2022-07-12 04:00:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:00:59,372 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:00:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:59,372 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:00:59,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 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) [2022-07-12 04:00:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:00:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:00:59,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:59,392 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-07-12 04:00:59,607 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:59,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2022-07-12 04:00:59,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:59,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622675333] [2022-07-12 04:00:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:59,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622675333] [2022-07-12 04:00:59,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622675333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907596333] [2022-07-12 04:00:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:59,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:59,942 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:00:59,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-07-12 04:00:59,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:59,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:00:59,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:00,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907596333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:00,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:00,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2022-07-12 04:01:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630359698] [2022-07-12 04:01:00,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:00,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 04:01:00,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 04:01:00,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 04:01:00,758 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 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) [2022-07-12 04:01:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:02,775 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2022-07-12 04:01:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 04:01:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 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 63 [2022-07-12 04:01:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:02,776 INFO L225 Difference]: With dead ends: 307 [2022-07-12 04:01:02,776 INFO L226 Difference]: Without dead ends: 261 [2022-07-12 04:01:02,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2022-07-12 04:01:02,777 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:02,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 236 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-12 04:01:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2022-07-12 04:01:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:03,103 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:03,103 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:03,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 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) [2022-07-12 04:01:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:03,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:03,103 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:03,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-07-12 04:01:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-07-12 04:01:03,315 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2022-07-12 04:01:03,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:03,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518062791] [2022-07-12 04:01:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:03,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:03,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:03,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518062791] [2022-07-12 04:01:03,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518062791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:03,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321949535] [2022-07-12 04:01:03,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:01:03,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:03,584 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:03,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-07-12 04:01:03,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-12 04:01:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:04,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:04,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321949535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:04,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:04,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2022-07-12 04:01:04,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128232489] [2022-07-12 04:01:04,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-12 04:01:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-12 04:01:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 04:01:04,413 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:06,956 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2022-07-12 04:01:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 04:01:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:06,957 INFO L225 Difference]: With dead ends: 362 [2022-07-12 04:01:06,957 INFO L226 Difference]: Without dead ends: 316 [2022-07-12 04:01:06,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5405 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 04:01:06,958 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:06,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 320 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-12 04:01:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2022-07-12 04:01:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:07,305 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:07,305 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:07,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:07,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:07,306 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:07,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:07,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:07,522 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2022-07-12 04:01:07,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:07,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851766657] [2022-07-12 04:01:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:07,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:07,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:07,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851766657] [2022-07-12 04:01:07,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851766657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:07,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044302617] [2022-07-12 04:01:07,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:01:07,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:07,836 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:07,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-07-12 04:01:07,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:01:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:08,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:08,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044302617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:08,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:08,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-07-12 04:01:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406526830] [2022-07-12 04:01:08,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-12 04:01:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-12 04:01:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 04:01:08,532 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:11,492 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2022-07-12 04:01:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-12 04:01:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:11,493 INFO L225 Difference]: With dead ends: 416 [2022-07-12 04:01:11,493 INFO L226 Difference]: Without dead ends: 370 [2022-07-12 04:01:11,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 04:01:11,494 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:11,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 425 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:01:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-07-12 04:01:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2022-07-12 04:01:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:11,854 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:11,854 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:11,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:11,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:11,855 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:11,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-07-12 04:01:12,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:12,069 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:12,070 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2022-07-12 04:01:12,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:12,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294903638] [2022-07-12 04:01:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294903638] [2022-07-12 04:01:12,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294903638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105826371] [2022-07-12 04:01:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:01:12,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:12,273 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:12,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-07-12 04:01:12,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-12 04:01:12,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:12,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:12,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105826371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:12,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:12,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2022-07-12 04:01:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249400423] [2022-07-12 04:01:12,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-12 04:01:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-12 04:01:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 04:01:12,837 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:16,018 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2022-07-12 04:01:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 04:01:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:16,019 INFO L225 Difference]: With dead ends: 469 [2022-07-12 04:01:16,019 INFO L226 Difference]: Without dead ends: 423 [2022-07-12 04:01:16,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6424 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2022-07-12 04:01:16,020 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 180 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:16,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 316 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-12 04:01:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2022-07-12 04:01:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:16,377 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:16,377 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:16,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:16,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:16,378 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:16,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:16,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-07-12 04:01:16,594 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2022-07-12 04:01:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:16,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265943963] [2022-07-12 04:01:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:16,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:16,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265943963] [2022-07-12 04:01:16,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265943963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:16,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047924564] [2022-07-12 04:01:16,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:01:16,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:16,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:16,893 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:16,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-07-12 04:01:16,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-12 04:01:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:17,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:17,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047924564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:17,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:17,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2022-07-12 04:01:17,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774908987] [2022-07-12 04:01:17,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:17,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 04:01:17,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 04:01:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:01:17,678 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:21,207 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2022-07-12 04:01:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 04:01:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:21,208 INFO L225 Difference]: With dead ends: 521 [2022-07-12 04:01:21,208 INFO L226 Difference]: Without dead ends: 475 [2022-07-12 04:01:21,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6651 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2022-07-12 04:01:21,209 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 241 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:21,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 277 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-12 04:01:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2022-07-12 04:01:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:21,560 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:21,561 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:21,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:21,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:21,561 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:21,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-07-12 04:01:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:21,778 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2022-07-12 04:01:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:21,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644982154] [2022-07-12 04:01:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:22,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644982154] [2022-07-12 04:01:22,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644982154] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989953198] [2022-07-12 04:01:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:01:22,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:22,020 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:22,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-07-12 04:01:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:22,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989953198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:22,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:22,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2022-07-12 04:01:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989790811] [2022-07-12 04:01:22,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 04:01:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 04:01:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 04:01:22,768 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:26,365 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2022-07-12 04:01:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-12 04:01:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:26,366 INFO L225 Difference]: With dead ends: 572 [2022-07-12 04:01:26,366 INFO L226 Difference]: Without dead ends: 526 [2022-07-12 04:01:26,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2022-07-12 04:01:26,367 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 269 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:26,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 397 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-12 04:01:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2022-07-12 04:01:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:26,716 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:26,716 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:26,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:26,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:26,717 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:26,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-07-12 04:01:26,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-07-12 04:01:26,933 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2022-07-12 04:01:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539930836] [2022-07-12 04:01:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539930836] [2022-07-12 04:01:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539930836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068099558] [2022-07-12 04:01:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:01:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:27,152 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:27,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-07-12 04:01:27,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:01:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:27,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:27,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:27,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068099558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:27,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:27,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2022-07-12 04:01:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098997769] [2022-07-12 04:01:27,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:27,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 04:01:27,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:27,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 04:01:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:01:27,651 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:31,465 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-07-12 04:01:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-12 04:01:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:31,466 INFO L225 Difference]: With dead ends: 622 [2022-07-12 04:01:31,466 INFO L226 Difference]: Without dead ends: 576 [2022-07-12 04:01:31,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2022-07-12 04:01:31,467 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 293 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:31,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 293 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-12 04:01:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2022-07-12 04:01:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:31,822 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:31,822 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:31,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:31,823 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:31,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:32,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-07-12 04:01:32,039 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2022-07-12 04:01:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:32,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446106335] [2022-07-12 04:01:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:32,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:32,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446106335] [2022-07-12 04:01:32,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446106335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:32,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246377511] [2022-07-12 04:01:32,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:01:32,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:32,346 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:32,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-07-12 04:01:32,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-12 04:01:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:33,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246377511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:33,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:33,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2022-07-12 04:01:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138205933] [2022-07-12 04:01:33,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:33,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 04:01:33,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 04:01:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:01:33,051 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 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) [2022-07-12 04:01:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:37,127 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2022-07-12 04:01:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 04:01:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 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) Word has length 63 [2022-07-12 04:01:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:37,128 INFO L225 Difference]: With dead ends: 671 [2022-07-12 04:01:37,129 INFO L226 Difference]: Without dead ends: 625 [2022-07-12 04:01:37,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6050 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 04:01:37,130 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 301 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 326 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-07-12 04:01:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2022-07-12 04:01:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:37,506 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:37,506 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:37,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 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) [2022-07-12 04:01:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:37,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:37,507 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:37,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-07-12 04:01:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:37,710 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2022-07-12 04:01:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:37,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301179550] [2022-07-12 04:01:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:37,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301179550] [2022-07-12 04:01:37,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301179550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097260590] [2022-07-12 04:01:37,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:01:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:38,000 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:38,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-07-12 04:01:38,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:01:38,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:38,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:38,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097260590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:38,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:38,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2022-07-12 04:01:38,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821287703] [2022-07-12 04:01:38,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:38,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-12 04:01:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-12 04:01:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 04:01:38,693 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:42,957 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2022-07-12 04:01:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 04:01:42,958 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:42,958 INFO L225 Difference]: With dead ends: 719 [2022-07-12 04:01:42,959 INFO L226 Difference]: Without dead ends: 673 [2022-07-12 04:01:42,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 04:01:42,960 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 349 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:42,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 326 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-12 04:01:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2022-07-12 04:01:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:43,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:43,335 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:43,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:43,335 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:43,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-07-12 04:01:43,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-07-12 04:01:43,553 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2022-07-12 04:01:43,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:43,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933451336] [2022-07-12 04:01:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:43,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933451336] [2022-07-12 04:01:43,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933451336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871512506] [2022-07-12 04:01:43,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:01:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:43,868 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:43,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-07-12 04:01:43,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-12 04:01:43,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:43,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:44,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:44,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871512506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:44,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:44,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2022-07-12 04:01:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591705857] [2022-07-12 04:01:44,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:44,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 04:01:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 04:01:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:01:44,551 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 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) [2022-07-12 04:01:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:48,893 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2022-07-12 04:01:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-12 04:01:48,893 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 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) Word has length 63 [2022-07-12 04:01:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:48,894 INFO L225 Difference]: With dead ends: 766 [2022-07-12 04:01:48,894 INFO L226 Difference]: Without dead ends: 720 [2022-07-12 04:01:48,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4641 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2022-07-12 04:01:48,895 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 418 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:48,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 318 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-07-12 04:01:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2022-07-12 04:01:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:49,252 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:49,252 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:49,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 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) [2022-07-12 04:01:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:49,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:49,253 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:49,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:49,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-07-12 04:01:49,466 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:49,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:49,467 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2022-07-12 04:01:49,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:49,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844958338] [2022-07-12 04:01:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:49,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844958338] [2022-07-12 04:01:49,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844958338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907626973] [2022-07-12 04:01:49,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:01:49,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:49,765 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:49,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-07-12 04:01:49,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-12 04:01:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:50,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:50,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907626973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:50,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:50,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2022-07-12 04:01:50,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842971211] [2022-07-12 04:01:50,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:50,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 04:01:50,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 04:01:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 04:01:50,426 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:54,869 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2022-07-12 04:01:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 04:01:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 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 63 [2022-07-12 04:01:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:54,870 INFO L225 Difference]: With dead ends: 812 [2022-07-12 04:01:54,871 INFO L226 Difference]: Without dead ends: 766 [2022-07-12 04:01:54,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 04:01:54,871 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 358 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:54,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 399 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-07-12 04:01:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2022-07-12 04:01:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-12 04:01:55,266 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-07-12 04:01:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:55,266 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-12 04:01:55,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-12 04:01:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:01:55,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:55,267 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:55,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-07-12 04:01:55,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:55,479 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2022-07-12 04:01:55,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187481604] [2022-07-12 04:01:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:55,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187481604] [2022-07-12 04:01:55,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187481604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664677500] [2022-07-12 04:01:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:01:55,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:55,804 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:55,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-07-12 04:01:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:01:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:56,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:56,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664677500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:56,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:56,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2022-07-12 04:01:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993022340] [2022-07-12 04:01:56,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 04:01:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 04:01:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 04:01:56,224 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 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) [2022-07-12 04:02:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:00,620 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2022-07-12 04:02:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 04:02:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 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) Word has length 63 [2022-07-12 04:02:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:00,621 INFO L225 Difference]: With dead ends: 860 [2022-07-12 04:02:00,621 INFO L226 Difference]: Without dead ends: 814 [2022-07-12 04:02:00,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 04:02:00,622 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 432 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:00,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 356 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:02:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-07-12 04:02:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2022-07-12 04:02:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-07-12 04:02:00,998 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2022-07-12 04:02:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:00,998 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-07-12 04:02:00,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 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) [2022-07-12 04:02:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-07-12 04:02:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 04:02:00,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:00,999 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:01,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-07-12 04:02:01,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:01,216 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2022-07-12 04:02:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418338333] [2022-07-12 04:02:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:01,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:01,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418338333] [2022-07-12 04:02:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418338333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116256759] [2022-07-12 04:02:01,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:02:01,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:01,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:01,338 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:01,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-07-12 04:02:01,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:02:01,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 04:02:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:01,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116256759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:01,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:01,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-07-12 04:02:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544635685] [2022-07-12 04:02:01,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:02:01,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:02:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:02:01,551 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:02,150 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-07-12 04:02:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 04:02:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 64 [2022-07-12 04:02:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:02,150 INFO L225 Difference]: With dead ends: 104 [2022-07-12 04:02:02,150 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 04:02:02,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:02:02,151 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:02,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 236 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:02:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 04:02:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-07-12 04:02:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-07-12 04:02:02,539 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2022-07-12 04:02:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:02,540 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-07-12 04:02:02,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-07-12 04:02:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:02,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:02,540 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:02,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:02,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-07-12 04:02:02,755 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2022-07-12 04:02:02,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413127468] [2022-07-12 04:02:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:03,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:03,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413127468] [2022-07-12 04:02:03,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413127468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:03,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311855552] [2022-07-12 04:02:03,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:02:03,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:03,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:03,127 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:03,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-07-12 04:02:03,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-12 04:02:03,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:03,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311855552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:04,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:04,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-07-12 04:02:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212707096] [2022-07-12 04:02:04,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-12 04:02:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-12 04:02:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 04:02:04,100 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:05,491 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2022-07-12 04:02:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 04:02:05,492 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:05,492 INFO L225 Difference]: With dead ends: 207 [2022-07-12 04:02:05,492 INFO L226 Difference]: Without dead ends: 158 [2022-07-12 04:02:05,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 04:02:05,493 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:05,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 235 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:02:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-12 04:02:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2022-07-12 04:02:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:05,896 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:05,896 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:05,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:05,902 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:05,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:06,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-07-12 04:02:06,107 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2022-07-12 04:02:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:06,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850058846] [2022-07-12 04:02:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:06,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850058846] [2022-07-12 04:02:06,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850058846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148261058] [2022-07-12 04:02:06,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:02:06,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:06,498 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:06,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-07-12 04:02:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:07,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:07,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148261058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:07,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:07,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2022-07-12 04:02:07,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360387327] [2022-07-12 04:02:07,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:07,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-12 04:02:07,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-12 04:02:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 04:02:07,460 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:09,651 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2022-07-12 04:02:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-12 04:02:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:09,651 INFO L225 Difference]: With dead ends: 268 [2022-07-12 04:02:09,652 INFO L226 Difference]: Without dead ends: 219 [2022-07-12 04:02:09,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2022-07-12 04:02:09,653 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:09,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 247 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-12 04:02:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2022-07-12 04:02:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:10,127 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:10,127 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:10,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:10,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:10,128 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:10,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:10,343 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2022-07-12 04:02:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780735789] [2022-07-12 04:02:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:10,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780735789] [2022-07-12 04:02:10,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780735789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554264874] [2022-07-12 04:02:10,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:02:10,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:10,679 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:10,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-07-12 04:02:10,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:02:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:10,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:11,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:11,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554264874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:11,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:11,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2022-07-12 04:02:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448830697] [2022-07-12 04:02:11,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:11,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-12 04:02:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-12 04:02:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 04:02:11,588 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:14,135 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-07-12 04:02:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 04:02:14,136 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:14,136 INFO L225 Difference]: With dead ends: 328 [2022-07-12 04:02:14,136 INFO L226 Difference]: Without dead ends: 279 [2022-07-12 04:02:14,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 04:02:14,137 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 95 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:14,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 293 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-12 04:02:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2022-07-12 04:02:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:14,579 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:14,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:14,579 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:14,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:14,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:14,580 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:14,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:14,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:14,793 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2022-07-12 04:02:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:14,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729684492] [2022-07-12 04:02:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:15,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:15,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729684492] [2022-07-12 04:02:15,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729684492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:15,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009899574] [2022-07-12 04:02:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:02:15,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:15,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:15,042 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:15,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-07-12 04:02:15,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-12 04:02:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:15,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:15,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009899574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:15,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:15,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2022-07-12 04:02:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253438460] [2022-07-12 04:02:15,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:15,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 04:02:15,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 04:02:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 04:02:15,893 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:19,113 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2022-07-12 04:02:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-12 04:02:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:19,114 INFO L225 Difference]: With dead ends: 387 [2022-07-12 04:02:19,114 INFO L226 Difference]: Without dead ends: 338 [2022-07-12 04:02:19,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6263 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2022-07-12 04:02:19,115 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:19,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 293 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-12 04:02:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2022-07-12 04:02:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:19,572 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:19,573 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:19,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:19,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:19,573 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:19,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:19,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:19,783 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2022-07-12 04:02:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:19,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079842937] [2022-07-12 04:02:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:19,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:20,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079842937] [2022-07-12 04:02:20,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079842937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169611734] [2022-07-12 04:02:20,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:02:20,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:20,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:20,063 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:20,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-07-12 04:02:20,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:02:20,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:20,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:20,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:20,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:20,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169611734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:20,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:20,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2022-07-12 04:02:20,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279983102] [2022-07-12 04:02:20,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:20,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 04:02:20,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 04:02:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 04:02:20,943 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:24,799 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2022-07-12 04:02:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 04:02:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:24,800 INFO L225 Difference]: With dead ends: 445 [2022-07-12 04:02:24,800 INFO L226 Difference]: Without dead ends: 396 [2022-07-12 04:02:24,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2022-07-12 04:02:24,801 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 162 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:24,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 335 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-12 04:02:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2022-07-12 04:02:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:25,292 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:25,292 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:25,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:25,292 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:25,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:25,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-07-12 04:02:25,508 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2022-07-12 04:02:25,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:25,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098877453] [2022-07-12 04:02:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:25,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:25,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:25,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098877453] [2022-07-12 04:02:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098877453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026820899] [2022-07-12 04:02:25,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:02:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:25,837 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:25,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-07-12 04:02:25,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-12 04:02:25,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:26,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026820899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:26,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:26,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2022-07-12 04:02:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753994459] [2022-07-12 04:02:26,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:26,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 04:02:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 04:02:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 04:02:26,695 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 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) [2022-07-12 04:02:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:30,964 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2022-07-12 04:02:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-12 04:02:30,964 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 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) Word has length 67 [2022-07-12 04:02:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:30,965 INFO L225 Difference]: With dead ends: 502 [2022-07-12 04:02:30,965 INFO L226 Difference]: Without dead ends: 453 [2022-07-12 04:02:30,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7589 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2022-07-12 04:02:30,966 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:30,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 356 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-12 04:02:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2022-07-12 04:02:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:31,575 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:31,576 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:31,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 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) [2022-07-12 04:02:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:31,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:31,576 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:31,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:31,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-07-12 04:02:31,793 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2022-07-12 04:02:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:31,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612621655] [2022-07-12 04:02:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:31,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:32,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612621655] [2022-07-12 04:02:32,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612621655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111244964] [2022-07-12 04:02:32,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:02:32,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:32,060 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:32,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-07-12 04:02:32,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-12 04:02:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:32,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:32,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:32,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111244964] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:32,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:32,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2022-07-12 04:02:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770765154] [2022-07-12 04:02:32,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 04:02:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 04:02:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 04:02:32,884 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:37,489 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2022-07-12 04:02:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-12 04:02:37,489 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:37,490 INFO L225 Difference]: With dead ends: 558 [2022-07-12 04:02:37,490 INFO L226 Difference]: Without dead ends: 509 [2022-07-12 04:02:37,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7956 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2022-07-12 04:02:37,491 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:37,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 391 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-07-12 04:02:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2022-07-12 04:02:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:37,954 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:37,954 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:37,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:37,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:37,954 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:37,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-07-12 04:02:38,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-07-12 04:02:38,159 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2022-07-12 04:02:38,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18599186] [2022-07-12 04:02:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:38,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:38,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18599186] [2022-07-12 04:02:38,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18599186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:38,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897165282] [2022-07-12 04:02:38,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:02:38,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:38,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:38,482 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:38,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-07-12 04:02:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:38,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:39,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897165282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:39,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:39,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2022-07-12 04:02:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588958842] [2022-07-12 04:02:39,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:39,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-12 04:02:39,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-12 04:02:39,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 04:02:39,306 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:44,260 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-07-12 04:02:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-12 04:02:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 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 67 [2022-07-12 04:02:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:44,261 INFO L225 Difference]: With dead ends: 613 [2022-07-12 04:02:44,261 INFO L226 Difference]: Without dead ends: 564 [2022-07-12 04:02:44,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8095 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3841, Invalid=18509, Unknown=0, NotChecked=0, Total=22350 [2022-07-12 04:02:44,263 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:44,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 364 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:02:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-12 04:02:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 97. [2022-07-12 04:02:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-07-12 04:02:44,746 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-07-12 04:02:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:44,746 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-07-12 04:02:44,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-07-12 04:02:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:02:44,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:44,747 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:44,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-07-12 04:02:44,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:44,948 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 121868893, now seen corresponding path program 86 times [2022-07-12 04:02:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962023612] [2022-07-12 04:02:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:45,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962023612] [2022-07-12 04:02:45,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962023612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231131948] [2022-07-12 04:02:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:02:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:45,230 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:45,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-07-12 04:02:45,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:02:45,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:02:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:45,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:02:46,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231131948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:46,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:46,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2022-07-12 04:02:46,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805356273] [2022-07-12 04:02:46,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:46,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-12 04:02:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-12 04:02:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 04:02:46,021 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)