./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_label27.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 dc961fc62f24960fbef105f97d1eee66be6194c126d8d078cb5da412dc4c48ac --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:52:54,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:52:54,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:52:54,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:52:54,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:52:54,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:52:54,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:52:54,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:52:54,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:52:54,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:52:54,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:52:54,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:52:54,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:52:54,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:52:54,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:52:54,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:52:54,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:52:54,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:52:54,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:52:54,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:52:54,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:52:54,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:52:54,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:52:54,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:52:54,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:52:54,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:52:54,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:52:54,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:52:54,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:52:54,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:52:54,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:52:54,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:52:54,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:52:54,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:52:54,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:52:54,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:52:54,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:52:54,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:52:54,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:52:54,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:52:54,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:52:54,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:52:54,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:52:54,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:52:54,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:52:54,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:52:54,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:52:54,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:52:54,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:52:54,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:52:54,714 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:52:54,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:52:54,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:52:54,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:52:54,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:52:54,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:52:54,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:52:54,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:52:54,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:52:54,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:52:54,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:52:54,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:52:54,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:52:54,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:52:54,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:52:54,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:52:54,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:52:54,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:52:54,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:52:54,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:52:54,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:52:54,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:52:54,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:52:54,718 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:52:54,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:52:54,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:52:54,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc961fc62f24960fbef105f97d1eee66be6194c126d8d078cb5da412dc4c48ac [2021-12-15 22:52:54,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:52:54,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:52:55,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:52:55,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:52:55,002 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:52:55,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label27.c [2021-12-15 22:52:55,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc910449/5f9654308ae3445c974b5f333aca09e8/FLAGd29a04da5 [2021-12-15 22:52:55,626 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:52:55,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label27.c [2021-12-15 22:52:55,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc910449/5f9654308ae3445c974b5f333aca09e8/FLAGd29a04da5 [2021-12-15 22:52:55,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc910449/5f9654308ae3445c974b5f333aca09e8 [2021-12-15 22:52:55,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:52:55,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:52:55,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:52:55,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:52:55,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:52:55,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:52:55" (1/1) ... [2021-12-15 22:52:55,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b714619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:55, skipping insertion in model container [2021-12-15 22:52:55,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:52:55" (1/1) ... [2021-12-15 22:52:55,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:52:55,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:52:56,225 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_label27.c[4605,4618] [2021-12-15 22:52:56,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:52:56,669 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:52:56,698 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_label27.c[4605,4618] [2021-12-15 22:52:56,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:52:56,867 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:52:56,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56 WrapperNode [2021-12-15 22:52:56,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:52:56,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:52:56,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:52:56,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:52:56,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:56,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,092 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 22:52:57,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:52:57,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:52:57,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:52:57,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:52:57,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:52:57,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:52:57,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:52:57,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:52:57,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (1/1) ... [2021-12-15 22:52:57,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:52:57,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:52:57,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:52:57,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:52:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:52:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:52:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:52:57,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:52:57,427 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:52:57,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:52:59,783 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:52:59,793 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:52:59,793 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:52:59,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:52:59 BoogieIcfgContainer [2021-12-15 22:52:59,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:52:59,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:52:59,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:52:59,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:52:59,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:52:55" (1/3) ... [2021-12-15 22:52:59,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c32a9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:52:59, skipping insertion in model container [2021-12-15 22:52:59,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:56" (2/3) ... [2021-12-15 22:52:59,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c32a9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:52:59, skipping insertion in model container [2021-12-15 22:52:59,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:52:59" (3/3) ... [2021-12-15 22:52:59,805 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label27.c [2021-12-15 22:52:59,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:52:59,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:52:59,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:52:59,864 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:52:59,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:52:59,891 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) [2021-12-15 22:52:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 22:52:59,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:52:59,900 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] [2021-12-15 22:52:59,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:52:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:52:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2021-12-15 22:52:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:52:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297532429] [2021-12-15 22:52:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:52:59,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:00,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:00,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297532429] [2021-12-15 22:53:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297532429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:00,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:00,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:53:00,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070580760] [2021-12-15 22:53:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:00,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:00,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:00,164 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 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:02,217 INFO L93 Difference]: Finished difference Result 1197 states and 2163 transitions. [2021-12-15 22:53:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-15 22:53:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:02,248 INFO L225 Difference]: With dead ends: 1197 [2021-12-15 22:53:02,248 INFO L226 Difference]: Without dead ends: 694 [2021-12-15 22:53:02,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:02,259 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 381 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:02,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 114 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:53:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-15 22:53:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 684. [2021-12-15 22:53:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.718887262079063) internal successors, (1174), 683 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1174 transitions. [2021-12-15 22:53:02,326 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1174 transitions. Word has length 37 [2021-12-15 22:53:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:02,327 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1174 transitions. [2021-12-15 22:53:02,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1174 transitions. [2021-12-15 22:53:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 22:53:02,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:02,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:02,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:53:02,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1560092623, now seen corresponding path program 1 times [2021-12-15 22:53:02,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16202635] [2021-12-15 22:53:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:02,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:02,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:02,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16202635] [2021-12-15 22:53:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16202635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:02,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:02,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:53:02,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212654210] [2021-12-15 22:53:02,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:02,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:02,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:02,490 INFO L87 Difference]: Start difference. First operand 684 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:04,267 INFO L93 Difference]: Finished difference Result 1681 states and 2896 transitions. [2021-12-15 22:53:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:04,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-15 22:53:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:04,272 INFO L225 Difference]: With dead ends: 1681 [2021-12-15 22:53:04,272 INFO L226 Difference]: Without dead ends: 999 [2021-12-15 22:53:04,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:04,274 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 254 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:04,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 226 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:53:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-12-15 22:53:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 989. [2021-12-15 22:53:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.6194331983805668) internal successors, (1600), 988 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1600 transitions. [2021-12-15 22:53:04,323 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1600 transitions. Word has length 102 [2021-12-15 22:53:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:04,324 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1600 transitions. [2021-12-15 22:53:04,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1600 transitions. [2021-12-15 22:53:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 22:53:04,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:04,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:04,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:53:04,339 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1857746444, now seen corresponding path program 1 times [2021-12-15 22:53:04,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011054168] [2021-12-15 22:53:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:04,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:04,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011054168] [2021-12-15 22:53:04,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011054168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:04,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:04,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:53:04,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099129295] [2021-12-15 22:53:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:04,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:04,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:04,457 INFO L87 Difference]: Start difference. First operand 989 states and 1600 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:06,326 INFO L93 Difference]: Finished difference Result 2574 states and 4255 transitions. [2021-12-15 22:53:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-15 22:53:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:06,333 INFO L225 Difference]: With dead ends: 2574 [2021-12-15 22:53:06,333 INFO L226 Difference]: Without dead ends: 1587 [2021-12-15 22:53:06,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:06,336 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 249 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:06,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 347 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 22:53:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-12-15 22:53:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1585. [2021-12-15 22:53:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.3977272727272727) internal successors, (2214), 1584 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2214 transitions. [2021-12-15 22:53:06,369 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2214 transitions. Word has length 103 [2021-12-15 22:53:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:06,370 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2214 transitions. [2021-12-15 22:53:06,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2214 transitions. [2021-12-15 22:53:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 22:53:06,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:06,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:06,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:53:06,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1622553922, now seen corresponding path program 1 times [2021-12-15 22:53:06,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:06,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468241448] [2021-12-15 22:53:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:06,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:06,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468241448] [2021-12-15 22:53:06,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468241448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:06,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:06,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:53:06,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506379583] [2021-12-15 22:53:06,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:06,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:53:06,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:53:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:53:06,485 INFO L87 Difference]: Start difference. First operand 1585 states and 2214 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:08,560 INFO L93 Difference]: Finished difference Result 3796 states and 5537 transitions. [2021-12-15 22:53:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:53:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 22:53:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:08,569 INFO L225 Difference]: With dead ends: 3796 [2021-12-15 22:53:08,569 INFO L226 Difference]: Without dead ends: 2512 [2021-12-15 22:53:08,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:53:08,572 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 396 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:08,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 341 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:53:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-12-15 22:53:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2185. [2021-12-15 22:53:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 1.3296703296703296) internal successors, (2904), 2184 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 2904 transitions. [2021-12-15 22:53:08,612 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 2904 transitions. Word has length 107 [2021-12-15 22:53:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:08,613 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 2904 transitions. [2021-12-15 22:53:08,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 2904 transitions. [2021-12-15 22:53:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 22:53:08,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:08,616 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:53:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:53:08,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1982643012, now seen corresponding path program 1 times [2021-12-15 22:53:08,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:08,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86488038] [2021-12-15 22:53:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:08,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 22:53:08,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86488038] [2021-12-15 22:53:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86488038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:08,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:08,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:53:08,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147067794] [2021-12-15 22:53:08,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:08,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:08,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:08,754 INFO L87 Difference]: Start difference. First operand 2185 states and 2904 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:10,026 INFO L93 Difference]: Finished difference Result 6170 states and 8284 transitions. [2021-12-15 22:53:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-12-15 22:53:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:10,039 INFO L225 Difference]: With dead ends: 6170 [2021-12-15 22:53:10,039 INFO L226 Difference]: Without dead ends: 3987 [2021-12-15 22:53:10,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:10,048 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:10,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:53:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2021-12-15 22:53:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 3684. [2021-12-15 22:53:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3683 states have (on average 1.25821341297855) internal successors, (4634), 3683 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 4634 transitions. [2021-12-15 22:53:10,120 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 4634 transitions. Word has length 207 [2021-12-15 22:53:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:10,122 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 4634 transitions. [2021-12-15 22:53:10,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 4634 transitions. [2021-12-15 22:53:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-15 22:53:10,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:10,131 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:53:10,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:53:10,131 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash -751252797, now seen corresponding path program 1 times [2021-12-15 22:53:10,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:10,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577943120] [2021-12-15 22:53:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:10,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-15 22:53:10,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577943120] [2021-12-15 22:53:10,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577943120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:10,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:10,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:53:10,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580997139] [2021-12-15 22:53:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:10,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:10,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:10,316 INFO L87 Difference]: Start difference. First operand 3684 states and 4634 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:11,558 INFO L93 Difference]: Finished difference Result 7665 states and 9577 transitions. [2021-12-15 22:53:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 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 355 [2021-12-15 22:53:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:11,570 INFO L225 Difference]: With dead ends: 7665 [2021-12-15 22:53:11,570 INFO L226 Difference]: Without dead ends: 3983 [2021-12-15 22:53:11,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:11,575 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:11,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:53:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2021-12-15 22:53:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3983. [2021-12-15 22:53:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 3982 states have (on average 1.2403314917127073) internal successors, (4939), 3982 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 4939 transitions. [2021-12-15 22:53:11,631 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 4939 transitions. Word has length 355 [2021-12-15 22:53:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:11,631 INFO L470 AbstractCegarLoop]: Abstraction has 3983 states and 4939 transitions. [2021-12-15 22:53:11,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 4939 transitions. [2021-12-15 22:53:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-15 22:53:11,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:11,638 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:11,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:53:11,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1244706693, now seen corresponding path program 1 times [2021-12-15 22:53:11,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611518197] [2021-12-15 22:53:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:11,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 22:53:11,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:11,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611518197] [2021-12-15 22:53:11,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611518197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:11,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:11,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:11,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93894615] [2021-12-15 22:53:11,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:11,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:11,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:11,805 INFO L87 Difference]: Start difference. First operand 3983 states and 4939 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:13,391 INFO L93 Difference]: Finished difference Result 8861 states and 11333 transitions. [2021-12-15 22:53:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 398 [2021-12-15 22:53:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:13,405 INFO L225 Difference]: With dead ends: 8861 [2021-12-15 22:53:13,405 INFO L226 Difference]: Without dead ends: 5179 [2021-12-15 22:53:13,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:13,411 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 277 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 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 [2021-12-15 22:53:13,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 22:53:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-12-15 22:53:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 3381. [2021-12-15 22:53:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.26301775147929) internal successors, (4269), 3380 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4269 transitions. [2021-12-15 22:53:13,473 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4269 transitions. Word has length 398 [2021-12-15 22:53:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:13,474 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4269 transitions. [2021-12-15 22:53:13,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4269 transitions. [2021-12-15 22:53:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-15 22:53:13,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:13,480 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:13,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:53:13,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash -911673582, now seen corresponding path program 1 times [2021-12-15 22:53:13,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:13,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024846005] [2021-12-15 22:53:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:13,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:13,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:13,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024846005] [2021-12-15 22:53:13,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024846005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:13,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:13,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:13,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359950796] [2021-12-15 22:53:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:13,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:13,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:13,644 INFO L87 Difference]: Start difference. First operand 3381 states and 4269 transitions. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:15,156 INFO L93 Difference]: Finished difference Result 8259 states and 10703 transitions. [2021-12-15 22:53:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 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 402 [2021-12-15 22:53:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:15,174 INFO L225 Difference]: With dead ends: 8259 [2021-12-15 22:53:15,174 INFO L226 Difference]: Without dead ends: 5179 [2021-12-15 22:53:15,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:15,180 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 250 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:15,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 276 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 22:53:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2021-12-15 22:53:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5178. [2021-12-15 22:53:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 1.2812439636855322) internal successors, (6633), 5177 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 6633 transitions. [2021-12-15 22:53:15,259 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 6633 transitions. Word has length 402 [2021-12-15 22:53:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:15,260 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 6633 transitions. [2021-12-15 22:53:15,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 6633 transitions. [2021-12-15 22:53:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-15 22:53:15,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:15,264 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:53:15,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:53:15,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1517405968, now seen corresponding path program 1 times [2021-12-15 22:53:15,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:15,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538299432] [2021-12-15 22:53:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:15,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 35 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:15,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538299432] [2021-12-15 22:53:15,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538299432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:53:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329194777] [2021-12-15 22:53:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:15,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:53:15,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:53:15,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:53:15,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:53:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:53:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:53:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 140 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:16,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:53:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 140 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:53:17,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329194777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:53:17,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:53:17,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-15 22:53:17,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786575520] [2021-12-15 22:53:17,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:53:17,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 22:53:17,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 22:53:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-15 22:53:17,253 INFO L87 Difference]: Start difference. First operand 5178 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 107.77777777777777) internal successors, (970), 9 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:29,230 INFO L93 Difference]: Finished difference Result 33501 states and 44806 transitions. [2021-12-15 22:53:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 22:53:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 107.77777777777777) internal successors, (970), 9 states have internal predecessors, (970), 0 states have call successors, (0), 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 414 [2021-12-15 22:53:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:29,294 INFO L225 Difference]: With dead ends: 33501 [2021-12-15 22:53:29,294 INFO L226 Difference]: Without dead ends: 28624 [2021-12-15 22:53:29,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-12-15 22:53:29,304 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 5901 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 9234 mSolverCounterSat, 4193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5901 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 13427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4193 IncrementalHoareTripleChecker+Valid, 9234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:29,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5901 Valid, 336 Invalid, 13427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4193 Valid, 9234 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2021-12-15 22:53:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28624 states. [2021-12-15 22:53:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28624 to 17767. [2021-12-15 22:53:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17767 states, 17766 states have (on average 1.2065743555105257) internal successors, (21436), 17766 states have internal predecessors, (21436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17767 states to 17767 states and 21436 transitions. [2021-12-15 22:53:29,624 INFO L78 Accepts]: Start accepts. Automaton has 17767 states and 21436 transitions. Word has length 414 [2021-12-15 22:53:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:29,625 INFO L470 AbstractCegarLoop]: Abstraction has 17767 states and 21436 transitions. [2021-12-15 22:53:29,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.77777777777777) internal successors, (970), 9 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 17767 states and 21436 transitions. [2021-12-15 22:53:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-12-15 22:53:29,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:29,633 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:53:29,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:53:29,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:53:29,848 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash -811690147, now seen corresponding path program 1 times [2021-12-15 22:53:29,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:29,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595881057] [2021-12-15 22:53:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:29,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 463 proven. 39 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 22:53:30,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:30,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595881057] [2021-12-15 22:53:30,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595881057] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:53:30,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796805672] [2021-12-15 22:53:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:30,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:53:30,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:53:30,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:53:30,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:53:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 22:53:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:53:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 463 proven. 39 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 22:53:31,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:53:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 463 proven. 39 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-15 22:53:32,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796805672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:53:32,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:53:32,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 22:53:32,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719639215] [2021-12-15 22:53:32,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:53:32,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 22:53:32,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 22:53:32,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 22:53:32,715 INFO L87 Difference]: Start difference. First operand 17767 states and 21436 transitions. Second operand has 9 states, 9 states have (on average 75.66666666666667) internal successors, (681), 8 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:37,943 INFO L93 Difference]: Finished difference Result 45465 states and 54115 transitions. [2021-12-15 22:53:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 22:53:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 75.66666666666667) internal successors, (681), 8 states have internal predecessors, (681), 0 states have call successors, (0), 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 502 [2021-12-15 22:53:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:37,976 INFO L225 Difference]: With dead ends: 45465 [2021-12-15 22:53:37,977 INFO L226 Difference]: Without dead ends: 18665 [2021-12-15 22:53:38,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-15 22:53:38,001 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 2858 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5691 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2858 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 6396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 5691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:38,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2858 Valid, 253 Invalid, 6396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 5691 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-15 22:53:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-12-15 22:53:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 17465. [2021-12-15 22:53:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17465 states, 17464 states have (on average 1.098602840128264) internal successors, (19186), 17464 states have internal predecessors, (19186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17465 states to 17465 states and 19186 transitions. [2021-12-15 22:53:38,267 INFO L78 Accepts]: Start accepts. Automaton has 17465 states and 19186 transitions. Word has length 502 [2021-12-15 22:53:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:38,267 INFO L470 AbstractCegarLoop]: Abstraction has 17465 states and 19186 transitions. [2021-12-15 22:53:38,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 75.66666666666667) internal successors, (681), 8 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 17465 states and 19186 transitions. [2021-12-15 22:53:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-12-15 22:53:38,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:38,271 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:38,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:53:38,493 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,SelfDestructingSolverStorable9 [2021-12-15 22:53:38,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 913610449, now seen corresponding path program 1 times [2021-12-15 22:53:38,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144087280] [2021-12-15 22:53:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:38,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-15 22:53:38,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:38,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144087280] [2021-12-15 22:53:38,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144087280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:38,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:38,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:38,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423528988] [2021-12-15 22:53:38,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:38,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:38,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:38,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:38,687 INFO L87 Difference]: Start difference. First operand 17465 states and 19186 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:39,713 INFO L93 Difference]: Finished difference Result 39412 states and 43544 transitions. [2021-12-15 22:53:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 510 [2021-12-15 22:53:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:39,742 INFO L225 Difference]: With dead ends: 39412 [2021-12-15 22:53:39,743 INFO L226 Difference]: Without dead ends: 22248 [2021-12-15 22:53:39,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:39,761 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 379 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:39,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 423 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:53:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22248 states. [2021-12-15 22:53:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22248 to 18361. [2021-12-15 22:53:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18361 states, 18360 states have (on average 1.1044117647058824) internal successors, (20277), 18360 states have internal predecessors, (20277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18361 states to 18361 states and 20277 transitions. [2021-12-15 22:53:40,038 INFO L78 Accepts]: Start accepts. Automaton has 18361 states and 20277 transitions. Word has length 510 [2021-12-15 22:53:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:40,040 INFO L470 AbstractCegarLoop]: Abstraction has 18361 states and 20277 transitions. [2021-12-15 22:53:40,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 18361 states and 20277 transitions. [2021-12-15 22:53:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-12-15 22:53:40,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:40,047 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:53:40,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:53:40,048 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1450074555, now seen corresponding path program 1 times [2021-12-15 22:53:40,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:40,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361600093] [2021-12-15 22:53:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:40,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 22:53:40,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:40,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361600093] [2021-12-15 22:53:40,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361600093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:40,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:40,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692762281] [2021-12-15 22:53:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:40,270 INFO L87 Difference]: Start difference. First operand 18361 states and 20277 transitions. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:41,349 INFO L93 Difference]: Finished difference Result 41801 states and 46186 transitions. [2021-12-15 22:53:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:41,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 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 578 [2021-12-15 22:53:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:41,379 INFO L225 Difference]: With dead ends: 41801 [2021-12-15 22:53:41,379 INFO L226 Difference]: Without dead ends: 23741 [2021-12-15 22:53:41,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:41,458 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 218 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:41,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 119 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:53:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23741 states. [2021-12-15 22:53:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23741 to 22246. [2021-12-15 22:53:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22246 states, 22245 states have (on average 1.0962463474938189) internal successors, (24386), 22245 states have internal predecessors, (24386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22246 states to 22246 states and 24386 transitions. [2021-12-15 22:53:41,686 INFO L78 Accepts]: Start accepts. Automaton has 22246 states and 24386 transitions. Word has length 578 [2021-12-15 22:53:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:41,688 INFO L470 AbstractCegarLoop]: Abstraction has 22246 states and 24386 transitions. [2021-12-15 22:53:41,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 22246 states and 24386 transitions. [2021-12-15 22:53:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-12-15 22:53:41,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:41,698 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:53:41,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:53:41,699 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1940217658, now seen corresponding path program 1 times [2021-12-15 22:53:41,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725378001] [2021-12-15 22:53:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:41,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-15 22:53:41,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725378001] [2021-12-15 22:53:41,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725378001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:41,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:41,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:41,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307203409] [2021-12-15 22:53:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:41,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:41,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:41,874 INFO L87 Difference]: Start difference. First operand 22246 states and 24386 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:42,791 INFO L93 Difference]: Finished difference Result 43894 states and 48153 transitions. [2021-12-15 22:53:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:42,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 624 [2021-12-15 22:53:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:42,815 INFO L225 Difference]: With dead ends: 43894 [2021-12-15 22:53:42,816 INFO L226 Difference]: Without dead ends: 21949 [2021-12-15 22:53:42,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:42,831 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 248 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:42,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 524 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:53:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21949 states. [2021-12-15 22:53:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21949 to 21649. [2021-12-15 22:53:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21649 states, 21648 states have (on average 1.0712767923133777) internal successors, (23191), 21648 states have internal predecessors, (23191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21649 states to 21649 states and 23191 transitions. [2021-12-15 22:53:43,056 INFO L78 Accepts]: Start accepts. Automaton has 21649 states and 23191 transitions. Word has length 624 [2021-12-15 22:53:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:43,056 INFO L470 AbstractCegarLoop]: Abstraction has 21649 states and 23191 transitions. [2021-12-15 22:53:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21649 states and 23191 transitions. [2021-12-15 22:53:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2021-12-15 22:53:43,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:43,066 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:53:43,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:53:43,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1116294429, now seen corresponding path program 1 times [2021-12-15 22:53:43,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:43,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755638393] [2021-12-15 22:53:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:43,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 455 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-12-15 22:53:43,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:43,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755638393] [2021-12-15 22:53:43,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755638393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:43,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:43,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:43,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950805437] [2021-12-15 22:53:43,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:43,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:43,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:43,326 INFO L87 Difference]: Start difference. First operand 21649 states and 23191 transitions. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:44,280 INFO L93 Difference]: Finished difference Result 43592 states and 46731 transitions. [2021-12-15 22:53:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 673 [2021-12-15 22:53:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:44,300 INFO L225 Difference]: With dead ends: 43592 [2021-12-15 22:53:44,301 INFO L226 Difference]: Without dead ends: 22244 [2021-12-15 22:53:44,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:44,316 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 438 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:44,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 70 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:53:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22244 states. [2021-12-15 22:53:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22244 to 21645. [2021-12-15 22:53:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21645 states, 21644 states have (on average 1.071151358344114) internal successors, (23184), 21644 states have internal predecessors, (23184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21645 states to 21645 states and 23184 transitions. [2021-12-15 22:53:44,627 INFO L78 Accepts]: Start accepts. Automaton has 21645 states and 23184 transitions. Word has length 673 [2021-12-15 22:53:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:44,627 INFO L470 AbstractCegarLoop]: Abstraction has 21645 states and 23184 transitions. [2021-12-15 22:53:44,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21645 states and 23184 transitions. [2021-12-15 22:53:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2021-12-15 22:53:44,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:44,636 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:53:44,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:53:44,637 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash 287574757, now seen corresponding path program 1 times [2021-12-15 22:53:44,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:44,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099152476] [2021-12-15 22:53:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:44,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-15 22:53:44,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099152476] [2021-12-15 22:53:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099152476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:44,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:44,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:44,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095988519] [2021-12-15 22:53:44,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:44,846 INFO L87 Difference]: Start difference. First operand 21645 states and 23184 transitions. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:45,892 INFO L93 Difference]: Finished difference Result 48669 states and 52153 transitions. [2021-12-15 22:53:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 673 [2021-12-15 22:53:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:45,923 INFO L225 Difference]: With dead ends: 48669 [2021-12-15 22:53:45,924 INFO L226 Difference]: Without dead ends: 27325 [2021-12-15 22:53:45,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:45,938 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 222 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:45,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 473 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:53:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27325 states. [2021-12-15 22:53:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27325 to 26126. [2021-12-15 22:53:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26126 states, 26125 states have (on average 1.0574545454545454) internal successors, (27626), 26125 states have internal predecessors, (27626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26126 states to 26126 states and 27626 transitions. [2021-12-15 22:53:46,267 INFO L78 Accepts]: Start accepts. Automaton has 26126 states and 27626 transitions. Word has length 673 [2021-12-15 22:53:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:46,268 INFO L470 AbstractCegarLoop]: Abstraction has 26126 states and 27626 transitions. [2021-12-15 22:53:46,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 26126 states and 27626 transitions. [2021-12-15 22:53:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-12-15 22:53:46,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:46,276 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:53:46,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:53:46,276 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2126082613, now seen corresponding path program 1 times [2021-12-15 22:53:46,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:46,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272672093] [2021-12-15 22:53:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:46,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-15 22:53:46,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272672093] [2021-12-15 22:53:46,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272672093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:46,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:46,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:46,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695952366] [2021-12-15 22:53:46,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:46,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:46,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:46,526 INFO L87 Difference]: Start difference. First operand 26126 states and 27626 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:47,416 INFO L93 Difference]: Finished difference Result 52846 states and 55877 transitions. [2021-12-15 22:53:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 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 686 [2021-12-15 22:53:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:47,441 INFO L225 Difference]: With dead ends: 52846 [2021-12-15 22:53:47,441 INFO L226 Difference]: Without dead ends: 26722 [2021-12-15 22:53:47,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:47,455 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 223 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:47,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 511 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:53:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2021-12-15 22:53:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26423. [2021-12-15 22:53:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26423 states, 26422 states have (on average 1.0496555900386042) internal successors, (27734), 26422 states have internal predecessors, (27734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26423 states to 26423 states and 27734 transitions. [2021-12-15 22:53:47,795 INFO L78 Accepts]: Start accepts. Automaton has 26423 states and 27734 transitions. Word has length 686 [2021-12-15 22:53:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:47,795 INFO L470 AbstractCegarLoop]: Abstraction has 26423 states and 27734 transitions. [2021-12-15 22:53:47,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 26423 states and 27734 transitions. [2021-12-15 22:53:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-12-15 22:53:47,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:47,805 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:53:47,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:53:47,805 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash 725553759, now seen corresponding path program 1 times [2021-12-15 22:53:47,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:47,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763130971] [2021-12-15 22:53:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:47,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-15 22:53:48,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763130971] [2021-12-15 22:53:48,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763130971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:53:48,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:53:48,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:53:48,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013705682] [2021-12-15 22:53:48,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:53:48,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:53:48,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:53:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:53:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:48,101 INFO L87 Difference]: Start difference. First operand 26423 states and 27734 transitions. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:53:49,145 INFO L93 Difference]: Finished difference Result 58538 states and 61455 transitions. [2021-12-15 22:53:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:53:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 713 [2021-12-15 22:53:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:53:49,184 INFO L225 Difference]: With dead ends: 58538 [2021-12-15 22:53:49,184 INFO L226 Difference]: Without dead ends: 32416 [2021-12-15 22:53:49,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:53:49,203 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 353 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:53:49,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 121 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:53:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32416 states. [2021-12-15 22:53:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32416 to 29112. [2021-12-15 22:53:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29112 states, 29111 states have (on average 1.0496375940366185) internal successors, (30556), 29111 states have internal predecessors, (30556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29112 states to 29112 states and 30556 transitions. [2021-12-15 22:53:49,585 INFO L78 Accepts]: Start accepts. Automaton has 29112 states and 30556 transitions. Word has length 713 [2021-12-15 22:53:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:53:49,586 INFO L470 AbstractCegarLoop]: Abstraction has 29112 states and 30556 transitions. [2021-12-15 22:53:49,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:53:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 29112 states and 30556 transitions. [2021-12-15 22:53:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-12-15 22:53:49,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:53:49,595 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:53:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:53:49,595 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:53:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:53:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1299106831, now seen corresponding path program 1 times [2021-12-15 22:53:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:53:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239997658] [2021-12-15 22:53:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:49,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:53:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 340 proven. 246 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-15 22:53:49,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:53:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239997658] [2021-12-15 22:53:49,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239997658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:53:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384206438] [2021-12-15 22:53:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:53:49,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:53:49,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:53:49,908 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) [2021-12-15 22:53:49,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:53:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:53:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:53:50,182 INFO L286 TraceCheckSpWp]: Computing forward predicates...