./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem03_label41.c -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 ee947e38812a78047df5e0d4c922466fc041cf3c45dbdc3424cead9945ce22c5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:05:20,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:05:20,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:05:20,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:05:20,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:05:20,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:05:20,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:05:20,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:05:20,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:05:20,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:05:20,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:05:20,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:05:20,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:05:20,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:05:20,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:05:20,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:05:20,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:05:20,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:05:20,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:05:20,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:05:20,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:05:20,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:05:20,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:05:20,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:05:20,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:05:20,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:05:20,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:05:20,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:05:20,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:05:20,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:05:20,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:05:20,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:05:20,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:05:20,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:05:20,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:05:20,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:05:20,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:05:20,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:05:20,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:05:20,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:05:20,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:05:20,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:05:20,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:05:20,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:05:20,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:05:20,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:05:20,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:05:20,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:05:20,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:05:20,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:05:20,751 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:05:20,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:05:20,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:05:20,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:05:20,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:05:20,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:05:20,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:05:20,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:05:20,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:05:20,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:05:20,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:05:20,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:05:20,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:05:20,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:05:20,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:05:20,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:05:20,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:05:20,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:05:20,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:05:20,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:05:20,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:05:20,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:05:20,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:05:20,757 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:05:20,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:05:20,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:05:20,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee947e38812a78047df5e0d4c922466fc041cf3c45dbdc3424cead9945ce22c5 [2021-12-15 09:05:20,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:05:21,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:05:21,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:05:21,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:05:21,011 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:05:21,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2021-12-15 09:05:21,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff891846/9846882adf014bacb4e7d5522567f36d/FLAG37edb03ed [2021-12-15 09:05:21,618 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:05:21,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2021-12-15 09:05:21,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff891846/9846882adf014bacb4e7d5522567f36d/FLAG37edb03ed [2021-12-15 09:05:22,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff891846/9846882adf014bacb4e7d5522567f36d [2021-12-15 09:05:22,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:05:22,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:05:22,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:05:22,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:05:22,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:05:22,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e7d851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22, skipping insertion in model container [2021-12-15 09:05:22,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:05:22,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:05:22,551 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/eca-rers2012/Problem03_label41.c[58800,58813] [2021-12-15 09:05:22,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:05:22,590 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:05:22,811 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/eca-rers2012/Problem03_label41.c[58800,58813] [2021-12-15 09:05:22,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:05:22,835 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:05:22,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22 WrapperNode [2021-12-15 09:05:22,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:05:22,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:05:22,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:05:22,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:05:22,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,962 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:05:22,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:05:22,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:05:22,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:05:22,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:05:22,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:22,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:23,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:23,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:23,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:23,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:05:23,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:05:23,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:05:23,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:05:23,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (1/1) ... [2021-12-15 09:05:23,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:05:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:23,117 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) [2021-12-15 09:05:23,131 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 [2021-12-15 09:05:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:05:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:05:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:05:23,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:05:23,269 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:05:23,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:05:24,598 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:05:24,612 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:05:24,613 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:05:24,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:05:24 BoogieIcfgContainer [2021-12-15 09:05:24,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:05:24,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:05:24,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:05:24,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:05:24,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:05:22" (1/3) ... [2021-12-15 09:05:24,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f342d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:05:24, skipping insertion in model container [2021-12-15 09:05:24,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:22" (2/3) ... [2021-12-15 09:05:24,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f342d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:05:24, skipping insertion in model container [2021-12-15 09:05:24,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:05:24" (3/3) ... [2021-12-15 09:05:24,623 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label41.c [2021-12-15 09:05:24,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:05:24,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:05:24,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:05:24,686 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:05:24,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:05:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-15 09:05:24,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:24,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:24,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:24,747 INFO L85 PathProgramCache]: Analyzing trace with hash 666295290, now seen corresponding path program 1 times [2021-12-15 09:05:24,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:24,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830816264] [2021-12-15 09:05:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:24,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:25,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830816264] [2021-12-15 09:05:25,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830816264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:25,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:25,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:25,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437665443] [2021-12-15 09:05:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:25,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:25,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:25,327 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:26,207 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2021-12-15 09:05:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-12-15 09:05:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:26,230 INFO L225 Difference]: With dead ends: 864 [2021-12-15 09:05:26,232 INFO L226 Difference]: Without dead ends: 468 [2021-12-15 09:05:26,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:26,243 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 96 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:26,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:05:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-15 09:05:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-12-15 09:05:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2021-12-15 09:05:26,297 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 182 [2021-12-15 09:05:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:26,298 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2021-12-15 09:05:26,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2021-12-15 09:05:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-15 09:05:26,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:26,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:26,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:05:26,302 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:26,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1747605302, now seen corresponding path program 1 times [2021-12-15 09:05:26,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:26,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457137394] [2021-12-15 09:05:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:26,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:26,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457137394] [2021-12-15 09:05:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457137394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:26,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:26,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:26,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838643380] [2021-12-15 09:05:26,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:26,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:26,377 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:27,037 INFO L93 Difference]: Finished difference Result 1336 states and 2182 transitions. [2021-12-15 09:05:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-15 09:05:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:27,042 INFO L225 Difference]: With dead ends: 1336 [2021-12-15 09:05:27,042 INFO L226 Difference]: Without dead ends: 884 [2021-12-15 09:05:27,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:27,045 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 265 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:27,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 133 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-15 09:05:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 878. [2021-12-15 09:05:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 1.5347776510832383) internal successors, (1346), 877 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1346 transitions. [2021-12-15 09:05:27,075 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1346 transitions. Word has length 187 [2021-12-15 09:05:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:27,075 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1346 transitions. [2021-12-15 09:05:27,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1346 transitions. [2021-12-15 09:05:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-15 09:05:27,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:27,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:27,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:05:27,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash -86973351, now seen corresponding path program 1 times [2021-12-15 09:05:27,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:27,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730255589] [2021-12-15 09:05:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:27,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:27,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730255589] [2021-12-15 09:05:27,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730255589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:27,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:27,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:27,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52010902] [2021-12-15 09:05:27,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:27,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:27,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:27,148 INFO L87 Difference]: Start difference. First operand 878 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:27,882 INFO L93 Difference]: Finished difference Result 2586 states and 3985 transitions. [2021-12-15 09:05:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-15 09:05:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:27,889 INFO L225 Difference]: With dead ends: 2586 [2021-12-15 09:05:27,889 INFO L226 Difference]: Without dead ends: 1710 [2021-12-15 09:05:27,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:27,892 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:27,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 91 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-15 09:05:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1692. [2021-12-15 09:05:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 1.5150798344175045) internal successors, (2562), 1691 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2562 transitions. [2021-12-15 09:05:27,925 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2562 transitions. Word has length 190 [2021-12-15 09:05:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:27,925 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2562 transitions. [2021-12-15 09:05:27,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2562 transitions. [2021-12-15 09:05:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:05:27,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:27,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:27,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:05:27,931 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash -442094460, now seen corresponding path program 1 times [2021-12-15 09:05:27,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:27,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995250779] [2021-12-15 09:05:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:27,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:05:27,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:27,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995250779] [2021-12-15 09:05:27,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995250779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:27,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:27,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:27,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377709186] [2021-12-15 09:05:27,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:27,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:28,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:28,001 INFO L87 Difference]: Start difference. First operand 1692 states and 2562 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:28,710 INFO L93 Difference]: Finished difference Result 5028 states and 7628 transitions. [2021-12-15 09:05:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:28,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 196 [2021-12-15 09:05:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:28,721 INFO L225 Difference]: With dead ends: 5028 [2021-12-15 09:05:28,721 INFO L226 Difference]: Without dead ends: 3338 [2021-12-15 09:05:28,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:28,724 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 234 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:28,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 147 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-12-15 09:05:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3333. [2021-12-15 09:05:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.4453781512605042) internal successors, (4816), 3332 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4816 transitions. [2021-12-15 09:05:28,784 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4816 transitions. Word has length 196 [2021-12-15 09:05:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:28,784 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 4816 transitions. [2021-12-15 09:05:28,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4816 transitions. [2021-12-15 09:05:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 09:05:28,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:28,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:28,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:05:28,791 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash -309474640, now seen corresponding path program 1 times [2021-12-15 09:05:28,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:28,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876879571] [2021-12-15 09:05:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:28,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:05:28,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876879571] [2021-12-15 09:05:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876879571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:28,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:28,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:28,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698006730] [2021-12-15 09:05:28,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:28,869 INFO L87 Difference]: Start difference. First operand 3333 states and 4816 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:29,628 INFO L93 Difference]: Finished difference Result 8313 states and 11980 transitions. [2021-12-15 09:05:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 197 [2021-12-15 09:05:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:29,647 INFO L225 Difference]: With dead ends: 8313 [2021-12-15 09:05:29,648 INFO L226 Difference]: Without dead ends: 4982 [2021-12-15 09:05:29,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:29,654 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 217 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:29,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-12-15 09:05:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4975. [2021-12-15 09:05:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 1.4246079613992761) internal successors, (7086), 4974 states have internal predecessors, (7086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 7086 transitions. [2021-12-15 09:05:29,745 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 7086 transitions. Word has length 197 [2021-12-15 09:05:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 7086 transitions. [2021-12-15 09:05:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 7086 transitions. [2021-12-15 09:05:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 09:05:29,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:29,755 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:29,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:05:29,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:29,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1729387925, now seen corresponding path program 1 times [2021-12-15 09:05:29,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:29,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823473010] [2021-12-15 09:05:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:29,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:05:29,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823473010] [2021-12-15 09:05:29,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823473010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:29,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:29,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:29,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43306766] [2021-12-15 09:05:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:29,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:29,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:29,863 INFO L87 Difference]: Start difference. First operand 4975 states and 7086 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:30,676 INFO L93 Difference]: Finished difference Result 14883 states and 21205 transitions. [2021-12-15 09:05:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 199 [2021-12-15 09:05:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:30,712 INFO L225 Difference]: With dead ends: 14883 [2021-12-15 09:05:30,713 INFO L226 Difference]: Without dead ends: 9910 [2021-12-15 09:05:30,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:30,723 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 286 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:30,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 98 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9910 states. [2021-12-15 09:05:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9910 to 9901. [2021-12-15 09:05:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9901 states, 9900 states have (on average 1.394040404040404) internal successors, (13801), 9900 states have internal predecessors, (13801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 13801 transitions. [2021-12-15 09:05:30,938 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 13801 transitions. Word has length 199 [2021-12-15 09:05:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:30,940 INFO L470 AbstractCegarLoop]: Abstraction has 9901 states and 13801 transitions. [2021-12-15 09:05:30,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 13801 transitions. [2021-12-15 09:05:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-15 09:05:30,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:30,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:30,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:05:30,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1773472226, now seen corresponding path program 1 times [2021-12-15 09:05:30,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:30,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947002733] [2021-12-15 09:05:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:30,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:05:31,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947002733] [2021-12-15 09:05:31,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947002733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:31,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:31,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:31,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037821128] [2021-12-15 09:05:31,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:31,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:31,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:31,017 INFO L87 Difference]: Start difference. First operand 9901 states and 13801 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:31,841 INFO L93 Difference]: Finished difference Result 29643 states and 41337 transitions. [2021-12-15 09:05:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-12-15 09:05:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:31,909 INFO L225 Difference]: With dead ends: 29643 [2021-12-15 09:05:31,909 INFO L226 Difference]: Without dead ends: 19744 [2021-12-15 09:05:31,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:31,928 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:31,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 190 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-12-15 09:05:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 19727. [2021-12-15 09:05:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19727 states, 19726 states have (on average 1.3820338639359222) internal successors, (27262), 19726 states have internal predecessors, (27262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19727 states to 19727 states and 27262 transitions. [2021-12-15 09:05:32,332 INFO L78 Accepts]: Start accepts. Automaton has 19727 states and 27262 transitions. Word has length 203 [2021-12-15 09:05:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:32,332 INFO L470 AbstractCegarLoop]: Abstraction has 19727 states and 27262 transitions. [2021-12-15 09:05:32,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 19727 states and 27262 transitions. [2021-12-15 09:05:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-15 09:05:32,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:32,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:32,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:05:32,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash 551206629, now seen corresponding path program 1 times [2021-12-15 09:05:32,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:32,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598340235] [2021-12-15 09:05:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:32,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:05:32,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:32,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598340235] [2021-12-15 09:05:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598340235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:32,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811032236] [2021-12-15 09:05:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:32,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:32,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:32,439 INFO L87 Difference]: Start difference. First operand 19727 states and 27262 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:32,882 INFO L93 Difference]: Finished difference Result 56832 states and 78722 transitions. [2021-12-15 09:05:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-12-15 09:05:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:32,956 INFO L225 Difference]: With dead ends: 56832 [2021-12-15 09:05:32,956 INFO L226 Difference]: Without dead ends: 37107 [2021-12-15 09:05:32,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:32,986 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 358 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:32,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 588 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:05:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37107 states. [2021-12-15 09:05:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37107 to 37089. [2021-12-15 09:05:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37089 states, 37088 states have (on average 1.3860278257118206) internal successors, (51405), 37088 states have internal predecessors, (51405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37089 states to 37089 states and 51405 transitions. [2021-12-15 09:05:33,677 INFO L78 Accepts]: Start accepts. Automaton has 37089 states and 51405 transitions. Word has length 204 [2021-12-15 09:05:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:33,678 INFO L470 AbstractCegarLoop]: Abstraction has 37089 states and 51405 transitions. [2021-12-15 09:05:33,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 37089 states and 51405 transitions. [2021-12-15 09:05:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-15 09:05:33,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:33,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:33,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:05:33,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash -125683877, now seen corresponding path program 1 times [2021-12-15 09:05:33,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246798898] [2021-12-15 09:05:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:33,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:33,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246798898] [2021-12-15 09:05:33,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246798898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878239662] [2021-12-15 09:05:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:33,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:33,923 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) [2021-12-15 09:05:33,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:05:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:34,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878239662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:34,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:34,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:05:34,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024152673] [2021-12-15 09:05:34,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:34,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:34,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:34,617 INFO L87 Difference]: Start difference. First operand 37089 states and 51405 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:35,609 INFO L93 Difference]: Finished difference Result 93443 states and 130448 transitions. [2021-12-15 09:05:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-12-15 09:05:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:35,830 INFO L225 Difference]: With dead ends: 93443 [2021-12-15 09:05:35,831 INFO L226 Difference]: Without dead ends: 56356 [2021-12-15 09:05:35,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:35,891 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:35,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 412 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56356 states. [2021-12-15 09:05:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56356 to 50055. [2021-12-15 09:05:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50055 states, 50054 states have (on average 1.2930035561593478) internal successors, (64720), 50054 states have internal predecessors, (64720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50055 states to 50055 states and 64720 transitions. [2021-12-15 09:05:36,747 INFO L78 Accepts]: Start accepts. Automaton has 50055 states and 64720 transitions. Word has length 204 [2021-12-15 09:05:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:36,747 INFO L470 AbstractCegarLoop]: Abstraction has 50055 states and 64720 transitions. [2021-12-15 09:05:36,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 50055 states and 64720 transitions. [2021-12-15 09:05:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-15 09:05:36,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:36,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:36,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:37,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:37,040 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 477867965, now seen corresponding path program 1 times [2021-12-15 09:05:37,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:37,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081244897] [2021-12-15 09:05:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:37,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-15 09:05:37,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:37,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081244897] [2021-12-15 09:05:37,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081244897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:37,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:37,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:37,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628858123] [2021-12-15 09:05:37,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:37,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:37,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:37,281 INFO L87 Difference]: Start difference. First operand 50055 states and 64720 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:38,475 INFO L93 Difference]: Finished difference Result 116474 states and 150624 transitions. [2021-12-15 09:05:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 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 245 [2021-12-15 09:05:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:38,605 INFO L225 Difference]: With dead ends: 116474 [2021-12-15 09:05:38,606 INFO L226 Difference]: Without dead ends: 66421 [2021-12-15 09:05:38,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:38,645 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:38,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 199 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66421 states. [2021-12-15 09:05:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66421 to 66388. [2021-12-15 09:05:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66388 states, 66387 states have (on average 1.285010619549008) internal successors, (85308), 66387 states have internal predecessors, (85308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66388 states to 66388 states and 85308 transitions. [2021-12-15 09:05:39,674 INFO L78 Accepts]: Start accepts. Automaton has 66388 states and 85308 transitions. Word has length 245 [2021-12-15 09:05:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:39,674 INFO L470 AbstractCegarLoop]: Abstraction has 66388 states and 85308 transitions. [2021-12-15 09:05:39,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 66388 states and 85308 transitions. [2021-12-15 09:05:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-15 09:05:39,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:39,736 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:39,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:05:39,737 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1751812903, now seen corresponding path program 1 times [2021-12-15 09:05:39,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605191355] [2021-12-15 09:05:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:39,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 09:05:39,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:39,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605191355] [2021-12-15 09:05:39,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605191355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:39,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:39,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:39,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866105666] [2021-12-15 09:05:39,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:39,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:39,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:39,995 INFO L87 Difference]: Start difference. First operand 66388 states and 85308 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:41,139 INFO L93 Difference]: Finished difference Result 163415 states and 213545 transitions. [2021-12-15 09:05:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 251 [2021-12-15 09:05:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:41,270 INFO L225 Difference]: With dead ends: 163415 [2021-12-15 09:05:41,271 INFO L226 Difference]: Without dead ends: 97029 [2021-12-15 09:05:41,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:41,322 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:41,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 201 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97029 states. [2021-12-15 09:05:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97029 to 82614. [2021-12-15 09:05:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82614 states, 82613 states have (on average 1.237190272717369) internal successors, (102208), 82613 states have internal predecessors, (102208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82614 states to 82614 states and 102208 transitions. [2021-12-15 09:05:42,821 INFO L78 Accepts]: Start accepts. Automaton has 82614 states and 102208 transitions. Word has length 251 [2021-12-15 09:05:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:42,822 INFO L470 AbstractCegarLoop]: Abstraction has 82614 states and 102208 transitions. [2021-12-15 09:05:42,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 82614 states and 102208 transitions. [2021-12-15 09:05:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-12-15 09:05:42,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:42,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:42,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:05:42,866 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1515021131, now seen corresponding path program 1 times [2021-12-15 09:05:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:42,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574461622] [2021-12-15 09:05:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:42,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-15 09:05:42,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574461622] [2021-12-15 09:05:42,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574461622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:42,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:42,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:42,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972610013] [2021-12-15 09:05:42,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:42,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:42,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:42,954 INFO L87 Difference]: Start difference. First operand 82614 states and 102208 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:44,144 INFO L93 Difference]: Finished difference Result 169320 states and 209274 transitions. [2021-12-15 09:05:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:44,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2021-12-15 09:05:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:44,251 INFO L225 Difference]: With dead ends: 169320 [2021-12-15 09:05:44,251 INFO L226 Difference]: Without dead ends: 86911 [2021-12-15 09:05:44,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:44,291 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 206 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:44,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 242 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86911 states. [2021-12-15 09:05:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86911 to 86883. [2021-12-15 09:05:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86883 states, 86882 states have (on average 1.233937984853019) internal successors, (107207), 86882 states have internal predecessors, (107207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86883 states to 86883 states and 107207 transitions. [2021-12-15 09:05:45,624 INFO L78 Accepts]: Start accepts. Automaton has 86883 states and 107207 transitions. Word has length 282 [2021-12-15 09:05:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:45,624 INFO L470 AbstractCegarLoop]: Abstraction has 86883 states and 107207 transitions. [2021-12-15 09:05:45,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 86883 states and 107207 transitions. [2021-12-15 09:05:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-15 09:05:45,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:45,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:45,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:05:45,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 551379523, now seen corresponding path program 1 times [2021-12-15 09:05:45,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:45,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143278034] [2021-12-15 09:05:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:45,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:05:45,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143278034] [2021-12-15 09:05:45,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143278034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:45,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:45,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:45,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974533373] [2021-12-15 09:05:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:45,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:45,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:45,840 INFO L87 Difference]: Start difference. First operand 86883 states and 107207 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:47,183 INFO L93 Difference]: Finished difference Result 204605 states and 254971 transitions. [2021-12-15 09:05:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:47,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-12-15 09:05:47,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:47,338 INFO L225 Difference]: With dead ends: 204605 [2021-12-15 09:05:47,338 INFO L226 Difference]: Without dead ends: 118536 [2021-12-15 09:05:47,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:47,377 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 260 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:47,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 376 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118536 states. [2021-12-15 09:05:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118536 to 117720. [2021-12-15 09:05:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117720 states, 117719 states have (on average 1.2077234770937573) internal successors, (142172), 117719 states have internal predecessors, (142172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117720 states to 117720 states and 142172 transitions. [2021-12-15 09:05:49,067 INFO L78 Accepts]: Start accepts. Automaton has 117720 states and 142172 transitions. Word has length 300 [2021-12-15 09:05:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:49,068 INFO L470 AbstractCegarLoop]: Abstraction has 117720 states and 142172 transitions. [2021-12-15 09:05:49,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 117720 states and 142172 transitions. [2021-12-15 09:05:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-15 09:05:49,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:49,144 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:49,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:05:49,144 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1391152319, now seen corresponding path program 1 times [2021-12-15 09:05:49,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:49,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333937088] [2021-12-15 09:05:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:49,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:05:49,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:49,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333937088] [2021-12-15 09:05:49,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333937088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:49,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:49,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:49,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448647673] [2021-12-15 09:05:49,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:49,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:49,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:49,317 INFO L87 Difference]: Start difference. First operand 117720 states and 142172 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:50,973 INFO L93 Difference]: Finished difference Result 265483 states and 320388 transitions. [2021-12-15 09:05:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 312 [2021-12-15 09:05:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:51,181 INFO L225 Difference]: With dead ends: 265483 [2021-12-15 09:05:51,181 INFO L226 Difference]: Without dead ends: 148374 [2021-12-15 09:05:51,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:51,251 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 232 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:51,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 388 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148374 states. [2021-12-15 09:05:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148374 to 127855. [2021-12-15 09:05:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127855 states, 127854 states have (on average 1.168004129710451) internal successors, (149334), 127854 states have internal predecessors, (149334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127855 states to 127855 states and 149334 transitions. [2021-12-15 09:05:53,353 INFO L78 Accepts]: Start accepts. Automaton has 127855 states and 149334 transitions. Word has length 312 [2021-12-15 09:05:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:53,354 INFO L470 AbstractCegarLoop]: Abstraction has 127855 states and 149334 transitions. [2021-12-15 09:05:53,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 127855 states and 149334 transitions. [2021-12-15 09:05:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-15 09:05:53,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:53,429 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:53,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:05:53,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2088840202, now seen corresponding path program 1 times [2021-12-15 09:05:53,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:53,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264592038] [2021-12-15 09:05:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:53,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 09:05:54,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264592038] [2021-12-15 09:05:54,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264592038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:54,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:54,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:54,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012617307] [2021-12-15 09:05:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:54,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:54,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:54,029 INFO L87 Difference]: Start difference. First operand 127855 states and 149334 transitions. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:55,460 INFO L93 Difference]: Finished difference Result 290248 states and 337627 transitions. [2021-12-15 09:05:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2021-12-15 09:05:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:55,669 INFO L225 Difference]: With dead ends: 290248 [2021-12-15 09:05:55,669 INFO L226 Difference]: Without dead ends: 163207 [2021-12-15 09:05:55,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:55,762 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 617 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:55,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 47 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163207 states. [2021-12-15 09:05:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163207 to 159345. [2021-12-15 09:05:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159345 states, 159344 states have (on average 1.137921729089266) internal successors, (181321), 159344 states have internal predecessors, (181321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159345 states to 159345 states and 181321 transitions. [2021-12-15 09:05:58,352 INFO L78 Accepts]: Start accepts. Automaton has 159345 states and 181321 transitions. Word has length 333 [2021-12-15 09:05:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:58,353 INFO L470 AbstractCegarLoop]: Abstraction has 159345 states and 181321 transitions. [2021-12-15 09:05:58,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 159345 states and 181321 transitions. [2021-12-15 09:05:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-12-15 09:05:58,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:58,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:58,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:05:58,419 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash -133675871, now seen corresponding path program 1 times [2021-12-15 09:05:58,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:58,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116569027] [2021-12-15 09:05:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:58,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:05:58,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:58,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116569027] [2021-12-15 09:05:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116569027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:58,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:58,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:58,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366455183] [2021-12-15 09:05:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:58,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:58,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:58,565 INFO L87 Difference]: Start difference. First operand 159345 states and 181321 transitions. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:00,221 INFO L93 Difference]: Finished difference Result 317876 states and 361768 transitions. [2021-12-15 09:06:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:06:00,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 337 [2021-12-15 09:06:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:00,413 INFO L225 Difference]: With dead ends: 317876 [2021-12-15 09:06:00,413 INFO L226 Difference]: Without dead ends: 159345 [2021-12-15 09:06:00,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:00,489 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 475 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:00,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 53 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159345 states. [2021-12-15 09:06:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159345 to 147571. [2021-12-15 09:06:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147571 states, 147570 states have (on average 1.134993562377177) internal successors, (167491), 147570 states have internal predecessors, (167491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147571 states to 147571 states and 167491 transitions. [2021-12-15 09:06:02,786 INFO L78 Accepts]: Start accepts. Automaton has 147571 states and 167491 transitions. Word has length 337 [2021-12-15 09:06:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:02,786 INFO L470 AbstractCegarLoop]: Abstraction has 147571 states and 167491 transitions. [2021-12-15 09:06:02,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 147571 states and 167491 transitions. [2021-12-15 09:06:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-15 09:06:02,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:02,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:02,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:06:02,834 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 744542131, now seen corresponding path program 1 times [2021-12-15 09:06:02,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:02,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943549064] [2021-12-15 09:06:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:02,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 09:06:02,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943549064] [2021-12-15 09:06:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943549064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41031889] [2021-12-15 09:06:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:02,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:02,994 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) [2021-12-15 09:06:02,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:06:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-15 09:06:03,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:03,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41031889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:03,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:03,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:06:03,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150939383] [2021-12-15 09:06:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:03,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:03,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:03,723 INFO L87 Difference]: Start difference. First operand 147571 states and 167491 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:05,180 INFO L93 Difference]: Finished difference Result 294748 states and 334562 transitions. [2021-12-15 09:06:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 353 [2021-12-15 09:06:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:05,356 INFO L225 Difference]: With dead ends: 294748 [2021-12-15 09:06:05,356 INFO L226 Difference]: Without dead ends: 147585 [2021-12-15 09:06:05,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:05,441 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 80 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:05,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 291 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147585 states. [2021-12-15 09:06:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147585 to 141075. [2021-12-15 09:06:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141075 states, 141074 states have (on average 1.1287196790336986) internal successors, (159233), 141074 states have internal predecessors, (159233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141075 states to 141075 states and 159233 transitions. [2021-12-15 09:06:08,008 INFO L78 Accepts]: Start accepts. Automaton has 141075 states and 159233 transitions. Word has length 353 [2021-12-15 09:06:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:08,009 INFO L470 AbstractCegarLoop]: Abstraction has 141075 states and 159233 transitions. [2021-12-15 09:06:08,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 141075 states and 159233 transitions. [2021-12-15 09:06:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-15 09:06:08,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:08,082 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:08,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:08,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:06:08,283 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash -864792780, now seen corresponding path program 1 times [2021-12-15 09:06:08,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:08,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891027987] [2021-12-15 09:06:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:08,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-15 09:06:08,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:08,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891027987] [2021-12-15 09:06:08,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891027987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:08,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:08,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:08,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878533216] [2021-12-15 09:06:08,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:08,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:08,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:08,395 INFO L87 Difference]: Start difference. First operand 141075 states and 159233 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:10,007 INFO L93 Difference]: Finished difference Result 316937 states and 357507 transitions. [2021-12-15 09:06:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:10,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 406 [2021-12-15 09:06:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:10,212 INFO L225 Difference]: With dead ends: 316937 [2021-12-15 09:06:10,212 INFO L226 Difference]: Without dead ends: 176270 [2021-12-15 09:06:10,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:10,301 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 187 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:10,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 350 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176270 states. [2021-12-15 09:06:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176270 to 155892. [2021-12-15 09:06:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155892 states, 155891 states have (on average 1.1242278258526792) internal successors, (175257), 155891 states have internal predecessors, (175257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155892 states to 155892 states and 175257 transitions. [2021-12-15 09:06:13,042 INFO L78 Accepts]: Start accepts. Automaton has 155892 states and 175257 transitions. Word has length 406 [2021-12-15 09:06:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:13,042 INFO L470 AbstractCegarLoop]: Abstraction has 155892 states and 175257 transitions. [2021-12-15 09:06:13,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 155892 states and 175257 transitions. [2021-12-15 09:06:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-12-15 09:06:13,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:13,170 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:13,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:06:13,170 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash 248410808, now seen corresponding path program 1 times [2021-12-15 09:06:13,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:13,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429889705] [2021-12-15 09:06:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:13,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms