./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem15_label12.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 a6e4197d0572096f9d487e671de9ba1541e800c13a9d5ac01008d7630fe3cd68 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:12:39,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:12:39,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:12:39,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:12:39,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:12:39,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:12:39,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:12:39,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:12:39,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:12:39,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:12:39,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:12:39,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:12:39,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:12:39,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:12:39,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:12:39,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:12:39,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:12:39,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:12:39,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:12:39,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:12:39,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:12:39,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:12:39,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:12:39,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:12:39,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:12:39,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:12:39,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:12:39,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:12:39,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:12:39,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:12:39,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:12:39,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:12:39,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:12:39,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:12:39,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:12:39,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:12:39,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:12:39,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:12:39,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:12:39,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:12:39,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:12:39,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:12:39,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:12:40,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:12:40,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:12:40,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:12:40,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:12:40,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:12:40,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:12:40,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:12:40,003 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:12:40,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:12:40,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:12:40,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:12:40,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:12:40,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:12:40,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:12:40,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:12:40,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:12:40,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:12:40,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:12:40,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:12:40,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:12:40,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:12:40,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:12:40,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:12:40,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:12:40,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:12:40,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:12:40,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:12:40,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e4197d0572096f9d487e671de9ba1541e800c13a9d5ac01008d7630fe3cd68 [2021-12-21 11:12:40,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:12:40,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:12:40,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:12:40,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:12:40,209 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:12:40,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2021-12-21 11:12:40,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4f7f55e/ceda2a0f30294d7aade315163b907661/FLAGa434540f7 [2021-12-21 11:12:40,761 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:12:40,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2021-12-21 11:12:40,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4f7f55e/ceda2a0f30294d7aade315163b907661/FLAGa434540f7 [2021-12-21 11:12:41,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4f7f55e/ceda2a0f30294d7aade315163b907661 [2021-12-21 11:12:41,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:12:41,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:12:41,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:12:41,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:12:41,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:12:41,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:12:41" (1/1) ... [2021-12-21 11:12:41,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71089f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:41, skipping insertion in model container [2021-12-21 11:12:41,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:12:41" (1/1) ... [2021-12-21 11:12:41,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:12:41,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:12:41,615 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/Problem15_label12.c[7168,7181] [2021-12-21 11:12:41,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:12:41,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:12:41,944 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/Problem15_label12.c[7168,7181] [2021-12-21 11:12:42,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:12:42,111 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:12:42,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42 WrapperNode [2021-12-21 11:12:42,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:12:42,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:12:42,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:12:42,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:12:42,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,298 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-21 11:12:42,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:12:42,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:12:42,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:12:42,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:12:42,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:12:42,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:12:42,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:12:42,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:12:42,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (1/1) ... [2021-12-21 11:12:42,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:12:42,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:12:42,518 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) [2021-12-21 11:12:42,560 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 [2021-12-21 11:12:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:12:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:12:42,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:12:42,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:12:42,625 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:12:42,627 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:12:44,548 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:12:44,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:12:44,556 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:12:44,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:12:44 BoogieIcfgContainer [2021-12-21 11:12:44,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:12:44,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:12:44,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:12:44,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:12:44,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:12:41" (1/3) ... [2021-12-21 11:12:44,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191b1865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:12:44, skipping insertion in model container [2021-12-21 11:12:44,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:42" (2/3) ... [2021-12-21 11:12:44,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191b1865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:12:44, skipping insertion in model container [2021-12-21 11:12:44,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:12:44" (3/3) ... [2021-12-21 11:12:44,564 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2021-12-21 11:12:44,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:12:44,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:12:44,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:12:44,601 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 [2021-12-21 11:12:44,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:12:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 11:12:44,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:44,621 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] [2021-12-21 11:12:44,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 118092897, now seen corresponding path program 1 times [2021-12-21 11:12:44,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:44,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000008432] [2021-12-21 11:12:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:44,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:44,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:44,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000008432] [2021-12-21 11:12:44,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000008432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:44,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:44,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:44,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919844570] [2021-12-21 11:12:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:44,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:44,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:44,835 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:46,404 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2021-12-21 11:12:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-21 11:12:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:46,431 INFO L225 Difference]: With dead ends: 1154 [2021-12-21 11:12:46,432 INFO L226 Difference]: Without dead ends: 665 [2021-12-21 11:12:46,435 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 [2021-12-21 11:12:46,437 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 262 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:12:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-21 11:12:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2021-12-21 11:12:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2021-12-21 11:12:46,521 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 59 [2021-12-21 11:12:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:46,522 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2021-12-21 11:12:46,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2021-12-21 11:12:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 11:12:46,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:46,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:12:46,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:12:46,531 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1794665063, now seen corresponding path program 1 times [2021-12-21 11:12:46,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:46,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195797595] [2021-12-21 11:12:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:46,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:46,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195797595] [2021-12-21 11:12:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195797595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:46,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:46,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:46,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304065831] [2021-12-21 11:12:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:46,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:46,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:46,632 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:47,836 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2021-12-21 11:12:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-21 11:12:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:47,840 INFO L225 Difference]: With dead ends: 1624 [2021-12-21 11:12:47,840 INFO L226 Difference]: Without dead ends: 963 [2021-12-21 11:12:47,841 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 [2021-12-21 11:12:47,842 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:47,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:12:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-21 11:12:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-12-21 11:12:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2021-12-21 11:12:47,864 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 124 [2021-12-21 11:12:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2021-12-21 11:12:47,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2021-12-21 11:12:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 11:12:47,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:47,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:12:47,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:12:47,867 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1505786198, now seen corresponding path program 1 times [2021-12-21 11:12:47,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121910509] [2021-12-21 11:12:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:47,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:47,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121910509] [2021-12-21 11:12:47,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121910509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:47,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:48,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:12:48,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870402058] [2021-12-21 11:12:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:48,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:12:48,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:12:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:12:48,001 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:50,088 INFO L93 Difference]: Finished difference Result 2244 states and 3201 transitions. [2021-12-21 11:12:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:12:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-21 11:12:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:50,093 INFO L225 Difference]: With dead ends: 2244 [2021-12-21 11:12:50,093 INFO L226 Difference]: Without dead ends: 1582 [2021-12-21 11:12:50,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:12:50,094 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:50,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 365 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:12:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-21 11:12:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266. [2021-12-21 11:12:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-21 11:12:50,112 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 129 [2021-12-21 11:12:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:50,113 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-21 11:12:50,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-21 11:12:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-21 11:12:50,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:50,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:50,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:12:50,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1334591182, now seen corresponding path program 1 times [2021-12-21 11:12:50,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:50,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124860217] [2021-12-21 11:12:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:50,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:50,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124860217] [2021-12-21 11:12:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124860217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:50,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:50,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:50,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138968161] [2021-12-21 11:12:50,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:50,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:12:50,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:12:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:12:50,277 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 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) [2021-12-21 11:12:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:52,678 INFO L93 Difference]: Finished difference Result 4670 states and 6170 transitions. [2021-12-21 11:12:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:12:52,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 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 225 [2021-12-21 11:12:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:52,687 INFO L225 Difference]: With dead ends: 4670 [2021-12-21 11:12:52,688 INFO L226 Difference]: Without dead ends: 3406 [2021-12-21 11:12:52,689 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 [2021-12-21 11:12:52,689 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 490 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:52,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 348 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:12:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-12-21 11:12:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3381. [2021-12-21 11:12:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2366863905325445) internal successors, (4180), 3380 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4180 transitions. [2021-12-21 11:12:52,727 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4180 transitions. Word has length 225 [2021-12-21 11:12:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:52,728 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4180 transitions. [2021-12-21 11:12:52,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 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) [2021-12-21 11:12:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4180 transitions. [2021-12-21 11:12:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-21 11:12:52,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:52,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:52,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:12:52,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 385527484, now seen corresponding path program 1 times [2021-12-21 11:12:52,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:52,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234491957] [2021-12-21 11:12:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:52,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 11:12:52,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234491957] [2021-12-21 11:12:52,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234491957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:52,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:52,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:52,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824965579] [2021-12-21 11:12:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:52,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:52,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:52,838 INFO L87 Difference]: Start difference. First operand 3381 states and 4180 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:53,899 INFO L93 Difference]: Finished difference Result 8563 states and 10754 transitions. [2021-12-21 11:12:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-12-21 11:12:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:53,914 INFO L225 Difference]: With dead ends: 8563 [2021-12-21 11:12:53,914 INFO L226 Difference]: Without dead ends: 5483 [2021-12-21 11:12:53,917 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 [2021-12-21 11:12:53,921 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:53,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:12:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-12-21 11:12:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2021-12-21 11:12:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.16870549570933) internal successors, (6401), 5477 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6401 transitions. [2021-12-21 11:12:53,991 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6401 transitions. Word has length 229 [2021-12-21 11:12:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:53,992 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6401 transitions. [2021-12-21 11:12:53,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6401 transitions. [2021-12-21 11:12:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-21 11:12:53,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:53,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:53,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:12:53,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1064012372, now seen corresponding path program 1 times [2021-12-21 11:12:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:54,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546940169] [2021-12-21 11:12:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:54,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 11:12:54,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546940169] [2021-12-21 11:12:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546940169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:54,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:54,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:12:54,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168168695] [2021-12-21 11:12:54,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:54,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:54,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:54,160 INFO L87 Difference]: Start difference. First operand 5478 states and 6401 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:55,226 INFO L93 Difference]: Finished difference Result 10655 states and 12489 transitions. [2021-12-21 11:12:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 331 [2021-12-21 11:12:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:55,239 INFO L225 Difference]: With dead ends: 10655 [2021-12-21 11:12:55,239 INFO L226 Difference]: Without dead ends: 5478 [2021-12-21 11:12:55,244 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 [2021-12-21 11:12:55,244 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:55,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:12:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-12-21 11:12:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2021-12-21 11:12:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1676100054774512) internal successors, (6395), 5477 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6395 transitions. [2021-12-21 11:12:55,307 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6395 transitions. Word has length 331 [2021-12-21 11:12:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:55,308 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6395 transitions. [2021-12-21 11:12:55,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6395 transitions. [2021-12-21 11:12:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-21 11:12:55,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:55,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-21 11:12:55,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:12:55,312 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash 131002693, now seen corresponding path program 1 times [2021-12-21 11:12:55,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:55,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796039421] [2021-12-21 11:12:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:55,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 11:12:55,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796039421] [2021-12-21 11:12:55,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796039421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:55,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:12:55,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:12:55,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709169681] [2021-12-21 11:12:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:55,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:55,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:12:55,440 INFO L87 Difference]: Start difference. First operand 5478 states and 6395 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:56,957 INFO L93 Difference]: Finished difference Result 11851 states and 14151 transitions. [2021-12-21 11:12:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 346 [2021-12-21 11:12:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:56,974 INFO L225 Difference]: With dead ends: 11851 [2021-12-21 11:12:56,974 INFO L226 Difference]: Without dead ends: 6674 [2021-12-21 11:12:56,979 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 [2021-12-21 11:12:56,982 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 256 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:56,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:12:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2021-12-21 11:12:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4876. [2021-12-21 11:12:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 1.1805128205128206) internal successors, (5755), 4875 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 5755 transitions. [2021-12-21 11:12:57,049 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 5755 transitions. Word has length 346 [2021-12-21 11:12:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:57,050 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 5755 transitions. [2021-12-21 11:12:57,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 5755 transitions. [2021-12-21 11:12:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-21 11:12:57,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:57,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:57,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:12:57,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1130119938, now seen corresponding path program 1 times [2021-12-21 11:12:57,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213673080] [2021-12-21 11:12:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:57,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:57,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213673080] [2021-12-21 11:12:57,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213673080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:12:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9182513] [2021-12-21 11:12:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:57,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:12:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:12:57,344 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) [2021-12-21 11:12:57,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:12:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:12:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:12:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:12:58,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:12:58,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9182513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:12:58,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:12:58,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:12:58,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452321559] [2021-12-21 11:12:58,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:12:58,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:12:58,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:12:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:12:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:12:58,147 INFO L87 Difference]: Start difference. First operand 4876 states and 5755 transitions. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:12:59,454 INFO L93 Difference]: Finished difference Result 11855 states and 14250 transitions. [2021-12-21 11:12:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:12:59,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 405 [2021-12-21 11:12:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:12:59,470 INFO L225 Difference]: With dead ends: 11855 [2021-12-21 11:12:59,470 INFO L226 Difference]: Without dead ends: 7280 [2021-12-21 11:12:59,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:12:59,475 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:12:59,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 345 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:12:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7280 states. [2021-12-21 11:12:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7280 to 6679. [2021-12-21 11:12:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 6678 states have (on average 1.1647199760407307) internal successors, (7778), 6678 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 7778 transitions. [2021-12-21 11:12:59,554 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 7778 transitions. Word has length 405 [2021-12-21 11:12:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:12:59,554 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 7778 transitions. [2021-12-21 11:12:59,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:12:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 7778 transitions. [2021-12-21 11:12:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-12-21 11:12:59,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:12:59,560 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:12:59,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:12:59,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:12:59,776 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:12:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:12:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1682645463, now seen corresponding path program 1 times [2021-12-21 11:12:59,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:12:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496202610] [2021-12-21 11:12:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:59,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:12:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:12:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 11:12:59,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:12:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496202610] [2021-12-21 11:12:59,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496202610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:12:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008582553] [2021-12-21 11:12:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:12:59,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:12:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:12:59,951 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) [2021-12-21 11:12:59,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:13:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:13:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 11:13:01,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:13:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 11:13:02,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008582553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:13:02,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:13:02,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-21 11:13:02,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209965851] [2021-12-21 11:13:02,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:13:02,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:13:02,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:02,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:13:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:13:02,149 INFO L87 Difference]: Start difference. First operand 6679 states and 7778 transitions. Second operand has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:07,391 INFO L93 Difference]: Finished difference Result 19597 states and 22611 transitions. [2021-12-21 11:13:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 11:13:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 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 422 [2021-12-21 11:13:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:07,401 INFO L225 Difference]: With dead ends: 19597 [2021-12-21 11:13:07,401 INFO L226 Difference]: Without dead ends: 7876 [2021-12-21 11:13:07,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-21 11:13:07,409 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2932 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5835 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2932 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 5835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:07,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2932 Valid, 286 Invalid, 6509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 5835 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-21 11:13:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-12-21 11:13:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6976. [2021-12-21 11:13:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6976 states, 6975 states have (on average 1.1105376344086022) internal successors, (7746), 6975 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6976 states to 6976 states and 7746 transitions. [2021-12-21 11:13:07,470 INFO L78 Accepts]: Start accepts. Automaton has 6976 states and 7746 transitions. Word has length 422 [2021-12-21 11:13:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:07,470 INFO L470 AbstractCegarLoop]: Abstraction has 6976 states and 7746 transitions. [2021-12-21 11:13:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6976 states and 7746 transitions. [2021-12-21 11:13:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-21 11:13:07,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:07,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:07,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 11:13:07,706 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,SelfDestructingSolverStorable8 [2021-12-21 11:13:07,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1464529448, now seen corresponding path program 1 times [2021-12-21 11:13:07,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457790112] [2021-12-21 11:13:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:07,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:13:07,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457790112] [2021-12-21 11:13:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457790112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:07,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:07,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:07,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035507569] [2021-12-21 11:13:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:07,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:07,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:07,842 INFO L87 Difference]: Start difference. First operand 6976 states and 7746 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:08,926 INFO L93 Difference]: Finished difference Result 15446 states and 17263 transitions. [2021-12-21 11:13:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 436 [2021-12-21 11:13:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:08,938 INFO L225 Difference]: With dead ends: 15446 [2021-12-21 11:13:08,939 INFO L226 Difference]: Without dead ends: 8472 [2021-12-21 11:13:08,945 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 [2021-12-21 11:13:08,945 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 267 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:08,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 554 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:13:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8472 states. [2021-12-21 11:13:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8472 to 8171. [2021-12-21 11:13:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.088984088127295) internal successors, (8897), 8170 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 8897 transitions. [2021-12-21 11:13:09,023 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 8897 transitions. Word has length 436 [2021-12-21 11:13:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:09,024 INFO L470 AbstractCegarLoop]: Abstraction has 8171 states and 8897 transitions. [2021-12-21 11:13:09,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 8897 transitions. [2021-12-21 11:13:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-21 11:13:09,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:09,028 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:09,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:13:09,028 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2118497435, now seen corresponding path program 1 times [2021-12-21 11:13:09,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:09,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331972393] [2021-12-21 11:13:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:09,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-21 11:13:09,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:09,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331972393] [2021-12-21 11:13:09,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331972393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:09,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:09,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:09,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578714552] [2021-12-21 11:13:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:09,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:09,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:09,175 INFO L87 Difference]: Start difference. First operand 8171 states and 8897 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:10,166 INFO L93 Difference]: Finished difference Result 18731 states and 20550 transitions. [2021-12-21 11:13:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 533 [2021-12-21 11:13:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:10,238 INFO L225 Difference]: With dead ends: 18731 [2021-12-21 11:13:10,251 INFO L226 Difference]: Without dead ends: 10562 [2021-12-21 11:13:10,254 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 [2021-12-21 11:13:10,255 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 271 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:10,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 202 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:13:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-12-21 11:13:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 9963. [2021-12-21 11:13:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 1.0847219433848625) internal successors, (10806), 9962 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 10806 transitions. [2021-12-21 11:13:10,320 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 10806 transitions. Word has length 533 [2021-12-21 11:13:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:10,321 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 10806 transitions. [2021-12-21 11:13:10,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 10806 transitions. [2021-12-21 11:13:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-12-21 11:13:10,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:10,325 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:10,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:13:10,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1773865919, now seen corresponding path program 1 times [2021-12-21 11:13:10,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347815190] [2021-12-21 11:13:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:10,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-21 11:13:10,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347815190] [2021-12-21 11:13:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347815190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:10,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:10,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697245084] [2021-12-21 11:13:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:10,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:10,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:10,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:10,455 INFO L87 Difference]: Start difference. First operand 9963 states and 10806 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:11,308 INFO L93 Difference]: Finished difference Result 19922 states and 21652 transitions. [2021-12-21 11:13:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:11,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 560 [2021-12-21 11:13:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:11,319 INFO L225 Difference]: With dead ends: 19922 [2021-12-21 11:13:11,320 INFO L226 Difference]: Without dead ends: 10260 [2021-12-21 11:13:11,326 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 [2021-12-21 11:13:11,326 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:11,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:13:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2021-12-21 11:13:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 9961. [2021-12-21 11:13:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9961 states, 9960 states have (on average 1.0845381526104418) internal successors, (10802), 9960 states have internal predecessors, (10802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9961 states to 9961 states and 10802 transitions. [2021-12-21 11:13:11,403 INFO L78 Accepts]: Start accepts. Automaton has 9961 states and 10802 transitions. Word has length 560 [2021-12-21 11:13:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 9961 states and 10802 transitions. [2021-12-21 11:13:11,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9961 states and 10802 transitions. [2021-12-21 11:13:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-12-21 11:13:11,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:11,431 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 3, 3, 3, 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, 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] [2021-12-21 11:13:11,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:13:11,431 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:11,432 INFO L85 PathProgramCache]: Analyzing trace with hash -566181386, now seen corresponding path program 1 times [2021-12-21 11:13:11,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:11,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15834755] [2021-12-21 11:13:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:11,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-21 11:13:11,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15834755] [2021-12-21 11:13:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15834755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:11,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160962591] [2021-12-21 11:13:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:11,593 INFO L87 Difference]: Start difference. First operand 9961 states and 10802 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:12,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:12,625 INFO L93 Difference]: Finished difference Result 22611 states and 24594 transitions. [2021-12-21 11:13:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:12,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 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 586 [2021-12-21 11:13:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:12,644 INFO L225 Difference]: With dead ends: 22611 [2021-12-21 11:13:12,645 INFO L226 Difference]: Without dead ends: 12652 [2021-12-21 11:13:12,652 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 [2021-12-21 11:13:12,653 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 198 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:12,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 173 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:13:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12652 states. [2021-12-21 11:13:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12652 to 12054. [2021-12-21 11:13:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 12053 states have (on average 1.0817223927652866) internal successors, (13038), 12053 states have internal predecessors, (13038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 13038 transitions. [2021-12-21 11:13:12,766 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 13038 transitions. Word has length 586 [2021-12-21 11:13:12,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:12,767 INFO L470 AbstractCegarLoop]: Abstraction has 12054 states and 13038 transitions. [2021-12-21 11:13:12,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 13038 transitions. [2021-12-21 11:13:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-12-21 11:13:12,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:12,772 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:13:12,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:13:12,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1867245461, now seen corresponding path program 1 times [2021-12-21 11:13:12,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:12,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323582028] [2021-12-21 11:13:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:12,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 264 proven. 188 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 11:13:13,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323582028] [2021-12-21 11:13:13,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323582028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120327725] [2021-12-21 11:13:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:13,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:13,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:13,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:13,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:13:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:13:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-21 11:13:14,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:13:14,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120327725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:14,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:13:14,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:13:14,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681049650] [2021-12-21 11:13:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:14,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:14,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:13:14,401 INFO L87 Difference]: Start difference. First operand 12054 states and 13038 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:15,847 INFO L93 Difference]: Finished difference Result 35839 states and 38890 transitions. [2021-12-21 11:13:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:15,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 594 [2021-12-21 11:13:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:15,873 INFO L225 Difference]: With dead ends: 35839 [2021-12-21 11:13:15,873 INFO L226 Difference]: Without dead ends: 24086 [2021-12-21 11:13:15,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:13:15,883 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 619 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:15,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 154 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:13:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24086 states. [2021-12-21 11:13:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24086 to 20489. [2021-12-21 11:13:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20488 states have (on average 1.0808766106989458) internal successors, (22145), 20488 states have internal predecessors, (22145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 22145 transitions. [2021-12-21 11:13:16,076 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 22145 transitions. Word has length 594 [2021-12-21 11:13:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:16,076 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 22145 transitions. [2021-12-21 11:13:16,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 22145 transitions. [2021-12-21 11:13:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-12-21 11:13:16,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:16,082 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:16,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:13:16,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:16,300 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1852804858, now seen corresponding path program 1 times [2021-12-21 11:13:16,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243450486] [2021-12-21 11:13:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:16,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-21 11:13:16,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:16,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243450486] [2021-12-21 11:13:16,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243450486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:16,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:16,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:16,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107150604] [2021-12-21 11:13:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:16,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:16,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:16,590 INFO L87 Difference]: Start difference. First operand 20489 states and 22145 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:17,497 INFO L93 Difference]: Finished difference Result 43666 states and 47508 transitions. [2021-12-21 11:13:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 638 [2021-12-21 11:13:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:17,523 INFO L225 Difference]: With dead ends: 43666 [2021-12-21 11:13:17,523 INFO L226 Difference]: Without dead ends: 24079 [2021-12-21 11:13:17,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:17,538 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 294 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:17,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 156 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:13:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24079 states. [2021-12-21 11:13:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24079 to 23779. [2021-12-21 11:13:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 1.080704853225671) internal successors, (25697), 23778 states have internal predecessors, (25697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 25697 transitions. [2021-12-21 11:13:17,729 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 25697 transitions. Word has length 638 [2021-12-21 11:13:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:17,729 INFO L470 AbstractCegarLoop]: Abstraction has 23779 states and 25697 transitions. [2021-12-21 11:13:17,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 25697 transitions. [2021-12-21 11:13:17,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-12-21 11:13:17,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:17,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-21 11:13:17,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:13:17,741 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash 838645165, now seen corresponding path program 1 times [2021-12-21 11:13:17,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:17,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514052569] [2021-12-21 11:13:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:17,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2021-12-21 11:13:17,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:17,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514052569] [2021-12-21 11:13:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514052569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:17,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:17,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:17,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206281497] [2021-12-21 11:13:17,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:17,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:17,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:17,998 INFO L87 Difference]: Start difference. First operand 23779 states and 25697 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:19,054 INFO L93 Difference]: Finished difference Result 48167 states and 52010 transitions. [2021-12-21 11:13:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 688 [2021-12-21 11:13:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:19,080 INFO L225 Difference]: With dead ends: 48167 [2021-12-21 11:13:19,080 INFO L226 Difference]: Without dead ends: 24390 [2021-12-21 11:13:19,094 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 [2021-12-21 11:13:19,094 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 264 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:19,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 527 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:13:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24390 states. [2021-12-21 11:13:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24390 to 23477. [2021-12-21 11:13:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23477 states, 23476 states have (on average 1.0772278071221673) internal successors, (25289), 23476 states have internal predecessors, (25289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23477 states to 23477 states and 25289 transitions. [2021-12-21 11:13:19,296 INFO L78 Accepts]: Start accepts. Automaton has 23477 states and 25289 transitions. Word has length 688 [2021-12-21 11:13:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:19,297 INFO L470 AbstractCegarLoop]: Abstraction has 23477 states and 25289 transitions. [2021-12-21 11:13:19,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23477 states and 25289 transitions. [2021-12-21 11:13:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2021-12-21 11:13:19,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:19,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-21 11:13:19,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:13:19,309 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1597872221, now seen corresponding path program 1 times [2021-12-21 11:13:19,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665653137] [2021-12-21 11:13:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:19,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-21 11:13:19,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665653137] [2021-12-21 11:13:19,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665653137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:19,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:19,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:19,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917638681] [2021-12-21 11:13:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:19,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:19,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:19,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:19,580 INFO L87 Difference]: Start difference. First operand 23477 states and 25289 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:20,390 INFO L93 Difference]: Finished difference Result 46655 states and 50279 transitions. [2021-12-21 11:13:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 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 744 [2021-12-21 11:13:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:20,413 INFO L225 Difference]: With dead ends: 46655 [2021-12-21 11:13:20,413 INFO L226 Difference]: Without dead ends: 23479 [2021-12-21 11:13:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:20,426 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:20,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 107 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23479 states. [2021-12-21 11:13:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23479 to 23477. [2021-12-21 11:13:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23477 states, 23476 states have (on average 1.0698585789742716) internal successors, (25116), 23476 states have internal predecessors, (25116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23477 states to 23477 states and 25116 transitions. [2021-12-21 11:13:20,711 INFO L78 Accepts]: Start accepts. Automaton has 23477 states and 25116 transitions. Word has length 744 [2021-12-21 11:13:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:20,711 INFO L470 AbstractCegarLoop]: Abstraction has 23477 states and 25116 transitions. [2021-12-21 11:13:20,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 23477 states and 25116 transitions. [2021-12-21 11:13:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2021-12-21 11:13:20,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:20,723 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:20,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:13:20,723 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:20,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1045679782, now seen corresponding path program 1 times [2021-12-21 11:13:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:20,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553085021] [2021-12-21 11:13:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:20,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 860 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-21 11:13:20,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:20,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553085021] [2021-12-21 11:13:20,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553085021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:20,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:20,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:20,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136858466] [2021-12-21 11:13:20,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:20,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:20,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:20,899 INFO L87 Difference]: Start difference. First operand 23477 states and 25116 transitions. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:22,158 INFO L93 Difference]: Finished difference Result 49344 states and 52795 transitions. [2021-12-21 11:13:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 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 748 [2021-12-21 11:13:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:22,186 INFO L225 Difference]: With dead ends: 49344 [2021-12-21 11:13:22,187 INFO L226 Difference]: Without dead ends: 27666 [2021-12-21 11:13:22,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:22,200 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 587 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:22,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 435 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:13:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27666 states. [2021-12-21 11:13:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27666 to 27066. [2021-12-21 11:13:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27066 states, 27065 states have (on average 1.0520968039903935) internal successors, (28475), 27065 states have internal predecessors, (28475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27066 states to 27066 states and 28475 transitions. [2021-12-21 11:13:22,568 INFO L78 Accepts]: Start accepts. Automaton has 27066 states and 28475 transitions. Word has length 748 [2021-12-21 11:13:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:22,568 INFO L470 AbstractCegarLoop]: Abstraction has 27066 states and 28475 transitions. [2021-12-21 11:13:22,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 27066 states and 28475 transitions. [2021-12-21 11:13:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-12-21 11:13:22,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:22,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-21 11:13:22,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 11:13:22,584 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1871974769, now seen corresponding path program 1 times [2021-12-21 11:13:22,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:22,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021967332] [2021-12-21 11:13:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:22,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 571 proven. 188 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-21 11:13:22,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:22,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021967332] [2021-12-21 11:13:22,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021967332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:22,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313749477] [2021-12-21 11:13:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:22,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:22,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:22,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:13:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:13:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-21 11:13:24,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:13:24,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313749477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:24,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:13:24,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-12-21 11:13:24,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054710905] [2021-12-21 11:13:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:24,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:24,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:13:24,430 INFO L87 Difference]: Start difference. First operand 27066 states and 28475 transitions. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:25,547 INFO L93 Difference]: Finished difference Result 34277 states and 36072 transitions. [2021-12-21 11:13:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:25,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 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 750 [2021-12-21 11:13:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:25,581 INFO L225 Difference]: With dead ends: 34277 [2021-12-21 11:13:25,582 INFO L226 Difference]: Without dead ends: 34275 [2021-12-21 11:13:25,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:13:25,592 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 495 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:25,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 151 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 780 Invalid, 0 Unknown, 1037 Unchecked, 1.0s Time] [2021-12-21 11:13:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34275 states. [2021-12-21 11:13:25,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34275 to 30971. [2021-12-21 11:13:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30971 states, 30970 states have (on average 1.0545689376816274) internal successors, (32660), 30970 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30971 states to 30971 states and 32660 transitions. [2021-12-21 11:13:26,010 INFO L78 Accepts]: Start accepts. Automaton has 30971 states and 32660 transitions. Word has length 750 [2021-12-21 11:13:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:26,011 INFO L470 AbstractCegarLoop]: Abstraction has 30971 states and 32660 transitions. [2021-12-21 11:13:26,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 30971 states and 32660 transitions. [2021-12-21 11:13:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2021-12-21 11:13:26,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:26,025 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:13:26,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:13:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:26,240 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1855722341, now seen corresponding path program 1 times [2021-12-21 11:13:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456710486] [2021-12-21 11:13:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:26,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 801 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-21 11:13:26,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:26,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456710486] [2021-12-21 11:13:26,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456710486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:26,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:26,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:26,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774134142] [2021-12-21 11:13:26,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:26,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:26,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:26,420 INFO L87 Difference]: Start difference. First operand 30971 states and 32660 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:27,293 INFO L93 Difference]: Finished difference Result 61641 states and 65017 transitions. [2021-12-21 11:13:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 768 [2021-12-21 11:13:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:27,327 INFO L225 Difference]: With dead ends: 61641 [2021-12-21 11:13:27,327 INFO L226 Difference]: Without dead ends: 30971 [2021-12-21 11:13:27,345 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 [2021-12-21 11:13:27,345 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 226 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:27,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 508 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30971 states. [2021-12-21 11:13:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30971 to 30971. [2021-12-21 11:13:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30971 states, 30970 states have (on average 1.0424927349047466) internal successors, (32286), 30970 states have internal predecessors, (32286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30971 states to 30971 states and 32286 transitions. [2021-12-21 11:13:27,740 INFO L78 Accepts]: Start accepts. Automaton has 30971 states and 32286 transitions. Word has length 768 [2021-12-21 11:13:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:27,741 INFO L470 AbstractCegarLoop]: Abstraction has 30971 states and 32286 transitions. [2021-12-21 11:13:27,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 30971 states and 32286 transitions. [2021-12-21 11:13:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-12-21 11:13:27,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:27,756 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:27,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 11:13:27,757 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash -184573624, now seen corresponding path program 1 times [2021-12-21 11:13:27,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527048193] [2021-12-21 11:13:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:27,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-21 11:13:27,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527048193] [2021-12-21 11:13:27,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527048193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:27,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:27,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:27,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775802567] [2021-12-21 11:13:27,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:27,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:27,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:27,954 INFO L87 Difference]: Start difference. First operand 30971 states and 32286 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:28,913 INFO L93 Difference]: Finished difference Result 61933 states and 64625 transitions. [2021-12-21 11:13:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:28,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 770 [2021-12-21 11:13:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:28,942 INFO L225 Difference]: With dead ends: 61933 [2021-12-21 11:13:28,942 INFO L226 Difference]: Without dead ends: 32761 [2021-12-21 11:13:28,955 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 [2021-12-21 11:13:28,956 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 343 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:28,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 435 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32761 states. [2021-12-21 11:13:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32761 to 17441. [2021-12-21 11:13:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17441 states, 17440 states have (on average 1.0420871559633027) internal successors, (18174), 17440 states have internal predecessors, (18174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17441 states to 17441 states and 18174 transitions. [2021-12-21 11:13:29,222 INFO L78 Accepts]: Start accepts. Automaton has 17441 states and 18174 transitions. Word has length 770 [2021-12-21 11:13:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:29,223 INFO L470 AbstractCegarLoop]: Abstraction has 17441 states and 18174 transitions. [2021-12-21 11:13:29,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 17441 states and 18174 transitions. [2021-12-21 11:13:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-12-21 11:13:29,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:29,236 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:29,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 11:13:29,237 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1667368353, now seen corresponding path program 1 times [2021-12-21 11:13:29,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598435513] [2021-12-21 11:13:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:29,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 643 proven. 188 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 11:13:29,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598435513] [2021-12-21 11:13:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598435513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542208120] [2021-12-21 11:13:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:29,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:29,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:29,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 11:13:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 11:13:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:13:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 757 proven. 76 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-21 11:13:31,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:13:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-21 11:13:33,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542208120] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:33,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:13:33,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-12-21 11:13:33,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72168920] [2021-12-21 11:13:33,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:33,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:33,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:13:33,270 INFO L87 Difference]: Start difference. First operand 17441 states and 18174 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:34,136 INFO L93 Difference]: Finished difference Result 36678 states and 38197 transitions. [2021-12-21 11:13:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 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 785 [2021-12-21 11:13:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:34,155 INFO L225 Difference]: With dead ends: 36678 [2021-12-21 11:13:34,155 INFO L226 Difference]: Without dead ends: 19538 [2021-12-21 11:13:34,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1572 GetRequests, 1566 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:13:34,165 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 159 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:34,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 90 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:13:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19538 states. [2021-12-21 11:13:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19538 to 18936. [2021-12-21 11:13:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18936 states, 18935 states have (on average 1.0389754423026143) internal successors, (19673), 18935 states have internal predecessors, (19673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18936 states to 18936 states and 19673 transitions. [2021-12-21 11:13:34,337 INFO L78 Accepts]: Start accepts. Automaton has 18936 states and 19673 transitions. Word has length 785 [2021-12-21 11:13:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:34,337 INFO L470 AbstractCegarLoop]: Abstraction has 18936 states and 19673 transitions. [2021-12-21 11:13:34,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 18936 states and 19673 transitions. [2021-12-21 11:13:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2021-12-21 11:13:34,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:34,348 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:34,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 11:13:34,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 11:13:34,560 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 497531781, now seen corresponding path program 1 times [2021-12-21 11:13:34,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601808261] [2021-12-21 11:13:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:34,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-21 11:13:34,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601808261] [2021-12-21 11:13:34,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601808261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:34,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:34,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:34,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26734094] [2021-12-21 11:13:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:34,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:34,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:34,871 INFO L87 Difference]: Start difference. First operand 18936 states and 19673 transitions. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:36,340 INFO L93 Difference]: Finished difference Result 42979 states and 44743 transitions. [2021-12-21 11:13:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 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 797 [2021-12-21 11:13:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:36,359 INFO L225 Difference]: With dead ends: 42979 [2021-12-21 11:13:36,360 INFO L226 Difference]: Without dead ends: 24045 [2021-12-21 11:13:36,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:36,365 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 425 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:36,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 130 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:13:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24045 states. [2021-12-21 11:13:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24045 to 23129. [2021-12-21 11:13:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23129 states, 23128 states have (on average 1.0386544448287789) internal successors, (24022), 23128 states have internal predecessors, (24022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23129 states to 23129 states and 24022 transitions. [2021-12-21 11:13:36,569 INFO L78 Accepts]: Start accepts. Automaton has 23129 states and 24022 transitions. Word has length 797 [2021-12-21 11:13:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 23129 states and 24022 transitions. [2021-12-21 11:13:36,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 23129 states and 24022 transitions. [2021-12-21 11:13:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2021-12-21 11:13:36,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:36,582 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:36,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 11:13:36,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1767804039, now seen corresponding path program 1 times [2021-12-21 11:13:36,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:36,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820885530] [2021-12-21 11:13:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:36,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 1062 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-21 11:13:36,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:36,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820885530] [2021-12-21 11:13:36,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820885530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:36,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:36,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:36,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347442421] [2021-12-21 11:13:36,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:36,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:36,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:36,770 INFO L87 Difference]: Start difference. First operand 23129 states and 24022 transitions. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:37,908 INFO L93 Difference]: Finished difference Result 49253 states and 51163 transitions. [2021-12-21 11:13:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 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 829 [2021-12-21 11:13:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:37,934 INFO L225 Difference]: With dead ends: 49253 [2021-12-21 11:13:37,934 INFO L226 Difference]: Without dead ends: 26425 [2021-12-21 11:13:37,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:37,948 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 758 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:37,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 145 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:13:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26425 states. [2021-12-21 11:13:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26425 to 23129. [2021-12-21 11:13:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23129 states, 23128 states have (on average 1.0386544448287789) internal successors, (24022), 23128 states have internal predecessors, (24022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23129 states to 23129 states and 24022 transitions. [2021-12-21 11:13:38,164 INFO L78 Accepts]: Start accepts. Automaton has 23129 states and 24022 transitions. Word has length 829 [2021-12-21 11:13:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 23129 states and 24022 transitions. [2021-12-21 11:13:38,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 23129 states and 24022 transitions. [2021-12-21 11:13:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-12-21 11:13:38,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:38,184 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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, 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] [2021-12-21 11:13:38,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 11:13:38,184 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 167783771, now seen corresponding path program 1 times [2021-12-21 11:13:38,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:38,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469656319] [2021-12-21 11:13:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:38,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 1090 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-12-21 11:13:38,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469656319] [2021-12-21 11:13:38,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469656319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:38,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:38,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:38,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733735291] [2021-12-21 11:13:38,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:38,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:38,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:38,457 INFO L87 Difference]: Start difference. First operand 23129 states and 24022 transitions. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:39,724 INFO L93 Difference]: Finished difference Result 49553 states and 51474 transitions. [2021-12-21 11:13:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 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 956 [2021-12-21 11:13:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:39,748 INFO L225 Difference]: With dead ends: 49553 [2021-12-21 11:13:39,748 INFO L226 Difference]: Without dead ends: 26725 [2021-12-21 11:13:39,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:39,759 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 539 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:39,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 167 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:13:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26725 states. [2021-12-21 11:13:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26725 to 22830. [2021-12-21 11:13:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22830 states, 22829 states have (on average 1.0385912654956415) internal successors, (23710), 22829 states have internal predecessors, (23710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22830 states to 22830 states and 23710 transitions. [2021-12-21 11:13:39,965 INFO L78 Accepts]: Start accepts. Automaton has 22830 states and 23710 transitions. Word has length 956 [2021-12-21 11:13:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 22830 states and 23710 transitions. [2021-12-21 11:13:39,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22830 states and 23710 transitions. [2021-12-21 11:13:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-12-21 11:13:39,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:39,987 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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, 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] [2021-12-21 11:13:39,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 11:13:39,987 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 666162767, now seen corresponding path program 1 times [2021-12-21 11:13:39,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489770609] [2021-12-21 11:13:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:39,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-12-21 11:13:40,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489770609] [2021-12-21 11:13:40,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489770609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:40,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:40,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:40,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586202330] [2021-12-21 11:13:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:40,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:40,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:40,217 INFO L87 Difference]: Start difference. First operand 22830 states and 23710 transitions. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:41,043 INFO L93 Difference]: Finished difference Result 47150 states and 48975 transitions. [2021-12-21 11:13:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 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 958 [2021-12-21 11:13:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:41,066 INFO L225 Difference]: With dead ends: 47150 [2021-12-21 11:13:41,066 INFO L226 Difference]: Without dead ends: 24621 [2021-12-21 11:13:41,078 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 [2021-12-21 11:13:41,079 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 312 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:41,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 511 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:13:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24621 states. [2021-12-21 11:13:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24621 to 21029. [2021-12-21 11:13:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 1.0380920677192316) internal successors, (21829), 21028 states have internal predecessors, (21829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 21829 transitions. [2021-12-21 11:13:41,361 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 21829 transitions. Word has length 958 [2021-12-21 11:13:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:41,361 INFO L470 AbstractCegarLoop]: Abstraction has 21029 states and 21829 transitions. [2021-12-21 11:13:41,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 21829 transitions. [2021-12-21 11:13:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2021-12-21 11:13:41,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:41,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:41,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 11:13:41,379 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2100020849, now seen corresponding path program 1 times [2021-12-21 11:13:41,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:41,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171685109] [2021-12-21 11:13:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:41,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 1053 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2021-12-21 11:13:41,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171685109] [2021-12-21 11:13:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171685109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:41,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:41,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:13:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875445342] [2021-12-21 11:13:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:41,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:13:41,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:13:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:41,683 INFO L87 Difference]: Start difference. First operand 21029 states and 21829 transitions. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:43,145 INFO L93 Difference]: Finished difference Result 48355 states and 50150 transitions. [2021-12-21 11:13:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:13:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 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 967 [2021-12-21 11:13:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:43,172 INFO L225 Difference]: With dead ends: 48355 [2021-12-21 11:13:43,173 INFO L226 Difference]: Without dead ends: 27627 [2021-12-21 11:13:43,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:13:43,190 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 492 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:43,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 130 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:13:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2021-12-21 11:13:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20730. [2021-12-21 11:13:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20730 states, 20729 states have (on average 1.0377731680254716) internal successors, (21512), 20729 states have internal predecessors, (21512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20730 states to 20730 states and 21512 transitions. [2021-12-21 11:13:43,412 INFO L78 Accepts]: Start accepts. Automaton has 20730 states and 21512 transitions. Word has length 967 [2021-12-21 11:13:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 20730 states and 21512 transitions. [2021-12-21 11:13:43,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 20730 states and 21512 transitions. [2021-12-21 11:13:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2021-12-21 11:13:43,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:43,426 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-21 11:13:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 11:13:43,426 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash -896374176, now seen corresponding path program 1 times [2021-12-21 11:13:43,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:43,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109568293] [2021-12-21 11:13:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:43,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 676 proven. 0 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-12-21 11:13:43,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:43,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109568293] [2021-12-21 11:13:43,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109568293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:13:43,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:13:43,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:13:43,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191473573] [2021-12-21 11:13:43,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:13:43,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:13:43,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:13:43,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:13:43,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:13:43,775 INFO L87 Difference]: Start difference. First operand 20730 states and 21512 transitions. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:13:44,694 INFO L93 Difference]: Finished difference Result 46554 states and 48370 transitions. [2021-12-21 11:13:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:13:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 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 968 [2021-12-21 11:13:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:13:44,719 INFO L225 Difference]: With dead ends: 46554 [2021-12-21 11:13:44,720 INFO L226 Difference]: Without dead ends: 26125 [2021-12-21 11:13:44,734 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 [2021-12-21 11:13:44,735 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:13:44,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 501 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:13:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-12-21 11:13:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 22525. [2021-12-21 11:13:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22525 states, 22524 states have (on average 1.0349849049902327) internal successors, (23312), 22524 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22525 states to 22525 states and 23312 transitions. [2021-12-21 11:13:45,046 INFO L78 Accepts]: Start accepts. Automaton has 22525 states and 23312 transitions. Word has length 968 [2021-12-21 11:13:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:13:45,047 INFO L470 AbstractCegarLoop]: Abstraction has 22525 states and 23312 transitions. [2021-12-21 11:13:45,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:13:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22525 states and 23312 transitions. [2021-12-21 11:13:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2021-12-21 11:13:45,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:13:45,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:13:45,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 11:13:45,063 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:13:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:13:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2120567468, now seen corresponding path program 1 times [2021-12-21 11:13:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:13:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802021012] [2021-12-21 11:13:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:45,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:13:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 1146 proven. 483 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-21 11:13:45,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:13:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802021012] [2021-12-21 11:13:45,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802021012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:13:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54775806] [2021-12-21 11:13:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:13:45,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:13:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:13:45,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:13:45,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 11:13:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:13:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:13:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates...