./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label59.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/Problem12_label59.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 51dcd89c10622c543bf9ef783ec22401c3170140113dd2b2907b165950bd75af --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:35:13,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:35:13,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:35:13,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:35:13,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:35:13,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:35:13,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:35:13,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:35:13,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:35:13,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:35:13,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:35:13,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:35:13,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:35:13,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:35:13,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:35:14,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:35:14,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:35:14,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:35:14,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:35:14,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:35:14,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:35:14,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:35:14,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:35:14,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:35:14,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:35:14,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:35:14,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:35:14,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:35:14,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:35:14,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:35:14,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:35:14,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:35:14,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:35:14,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:35:14,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:35:14,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:35:14,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:35:14,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:35:14,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:35:14,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:35:14,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:35:14,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:35:14,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:35:14,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:35:14,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:35:14,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:35:14,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:35:14,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:35:14,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:35:14,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:35:14,060 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:35:14,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:35:14,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:35:14,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:35:14,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:35:14,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:35:14,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:35:14,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:35:14,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:35:14,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:35:14,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:35:14,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:35:14,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:35:14,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:35:14,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:35:14,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:35:14,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:35:14,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:35:14,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:35:14,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:35:14,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51dcd89c10622c543bf9ef783ec22401c3170140113dd2b2907b165950bd75af [2021-12-17 04:35:14,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:35:14,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:35:14,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:35:14,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:35:14,382 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:35:14,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label59.c [2021-12-17 04:35:14,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e420c2f85/48c514d6a7474babb9f5711e23920fe4/FLAG8160bcc42 [2021-12-17 04:35:15,100 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:35:15,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label59.c [2021-12-17 04:35:15,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e420c2f85/48c514d6a7474babb9f5711e23920fe4/FLAG8160bcc42 [2021-12-17 04:35:15,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e420c2f85/48c514d6a7474babb9f5711e23920fe4 [2021-12-17 04:35:15,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:35:15,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:35:15,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:35:15,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:35:15,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:35:15,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:35:15" (1/1) ... [2021-12-17 04:35:15,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b77534e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:15, skipping insertion in model container [2021-12-17 04:35:15,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:35:15" (1/1) ... [2021-12-17 04:35:15,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:35:15,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:35:15,811 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label59.c[5577,5590] [2021-12-17 04:35:16,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:35:16,443 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:35:16,472 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/Problem12_label59.c[5577,5590] [2021-12-17 04:35:16,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:35:16,813 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:35:16,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16 WrapperNode [2021-12-17 04:35:16,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:35:16,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:35:16,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:35:16,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:35:16,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:16,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,131 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-17 04:35:17,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:35:17,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:35:17,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:35:17,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:35:17,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:35:17,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:35:17,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:35:17,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:35:17,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (1/1) ... [2021-12-17 04:35:17,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:35:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:35:17,549 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) [2021-12-17 04:35:17,555 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 [2021-12-17 04:35:17,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:35:17,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:35:17,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:35:17,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:35:17,646 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:35:17,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:35:20,455 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:35:20,465 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:35:20,466 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:35:20,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:35:20 BoogieIcfgContainer [2021-12-17 04:35:20,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:35:20,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:35:20,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:35:20,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:35:20,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:35:15" (1/3) ... [2021-12-17 04:35:20,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e80aabd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:35:20, skipping insertion in model container [2021-12-17 04:35:20,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:16" (2/3) ... [2021-12-17 04:35:20,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e80aabd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:35:20, skipping insertion in model container [2021-12-17 04:35:20,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:35:20" (3/3) ... [2021-12-17 04:35:20,473 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2021-12-17 04:35:20,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:35:20,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:35:20,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:35:20,513 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 [2021-12-17 04:35:20,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:35:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 04:35:20,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:20,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:20,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2021-12-17 04:35:20,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:20,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966898121] [2021-12-17 04:35:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:20,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:35:20,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966898121] [2021-12-17 04:35:20,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966898121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:20,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:20,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:35:20,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744980858] [2021-12-17 04:35:20,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:20,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:20,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:20,731 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:23,581 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-17 04:35:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-17 04:35:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:23,605 INFO L225 Difference]: With dead ends: 2388 [2021-12-17 04:35:23,605 INFO L226 Difference]: Without dead ends: 1506 [2021-12-17 04:35:23,612 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 [2021-12-17 04:35:23,614 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 792 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:23,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:35:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-17 04:35:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-17 04:35:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2021-12-17 04:35:23,695 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 44 [2021-12-17 04:35:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:23,695 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2021-12-17 04:35:23,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2021-12-17 04:35:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 04:35:23,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:23,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:23,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:35:23,700 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 606861728, now seen corresponding path program 1 times [2021-12-17 04:35:23,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:23,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634672442] [2021-12-17 04:35:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:23,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:35:23,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634672442] [2021-12-17 04:35:23,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634672442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:23,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:23,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:23,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451652480] [2021-12-17 04:35:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:23,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:35:23,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:35:23,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:35:23,850 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:28,290 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2021-12-17 04:35:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:35:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-17 04:35:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:28,303 INFO L225 Difference]: With dead ends: 5271 [2021-12-17 04:35:28,303 INFO L226 Difference]: Without dead ends: 3767 [2021-12-17 04:35:28,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:35:28,306 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 2307 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:28,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2307 Valid, 197 Invalid, 5146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 04:35:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-12-17 04:35:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2021-12-17 04:35:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6056412985630655) internal successors, (6034), 3758 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6034 transitions. [2021-12-17 04:35:28,353 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6034 transitions. Word has length 109 [2021-12-17 04:35:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:28,355 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 6034 transitions. [2021-12-17 04:35:28,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6034 transitions. [2021-12-17 04:35:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 04:35:28,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:28,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:28,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:35:28,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1014367121, now seen corresponding path program 1 times [2021-12-17 04:35:28,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553920097] [2021-12-17 04:35:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:28,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:35:28,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:28,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553920097] [2021-12-17 04:35:28,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553920097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:28,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:28,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:28,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460402087] [2021-12-17 04:35:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:28,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:35:28,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:35:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:35:28,593 INFO L87 Difference]: Start difference. First operand 3759 states and 6034 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:32,215 INFO L93 Difference]: Finished difference Result 10559 states and 17378 transitions. [2021-12-17 04:35:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:35:32,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-17 04:35:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:32,234 INFO L225 Difference]: With dead ends: 10559 [2021-12-17 04:35:32,235 INFO L226 Difference]: Without dead ends: 6765 [2021-12-17 04:35:32,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:35:32,243 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:32,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 714 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:35:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2021-12-17 04:35:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 6763. [2021-12-17 04:35:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.357438627624963) internal successors, (9179), 6762 states have internal predecessors, (9179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9179 transitions. [2021-12-17 04:35:32,388 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9179 transitions. Word has length 115 [2021-12-17 04:35:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:32,389 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9179 transitions. [2021-12-17 04:35:32,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9179 transitions. [2021-12-17 04:35:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-17 04:35:32,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:32,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:32,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:35:32,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1293105368, now seen corresponding path program 1 times [2021-12-17 04:35:32,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:32,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279768617] [2021-12-17 04:35:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:32,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:35:32,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:32,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279768617] [2021-12-17 04:35:32,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279768617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:32,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:32,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:32,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650062754] [2021-12-17 04:35:32,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:32,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:32,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:32,544 INFO L87 Difference]: Start difference. First operand 6763 states and 9179 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:35,274 INFO L93 Difference]: Finished difference Result 16528 states and 23482 transitions. [2021-12-17 04:35:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-12-17 04:35:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:35,309 INFO L225 Difference]: With dead ends: 16528 [2021-12-17 04:35:35,309 INFO L226 Difference]: Without dead ends: 9767 [2021-12-17 04:35:35,318 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 [2021-12-17 04:35:35,320 INFO L933 BasicCegarLoop]: 1350 mSDtfsCounter, 734 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:35,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1358 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:35:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-17 04:35:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-17 04:35:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3271554372312102) internal successors, (12961), 9766 states have internal predecessors, (12961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12961 transitions. [2021-12-17 04:35:35,489 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12961 transitions. Word has length 189 [2021-12-17 04:35:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:35,489 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12961 transitions. [2021-12-17 04:35:35,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12961 transitions. [2021-12-17 04:35:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-17 04:35:35,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:35,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-17 04:35:35,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:35:35,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash 374813785, now seen corresponding path program 1 times [2021-12-17 04:35:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:35,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224233756] [2021-12-17 04:35:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:35,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-17 04:35:35,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:35,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224233756] [2021-12-17 04:35:35,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224233756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:35,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:35,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:35:35,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211274699] [2021-12-17 04:35:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:35,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:35,627 INFO L87 Difference]: Start difference. First operand 9767 states and 12961 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:38,240 INFO L93 Difference]: Finished difference Result 25542 states and 34829 transitions. [2021-12-17 04:35:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-12-17 04:35:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:38,281 INFO L225 Difference]: With dead ends: 25542 [2021-12-17 04:35:38,282 INFO L226 Difference]: Without dead ends: 15777 [2021-12-17 04:35:38,295 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 [2021-12-17 04:35:38,296 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:38,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 388 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:35:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-12-17 04:35:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15775. [2021-12-17 04:35:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.301572207429948) internal successors, (20531), 15774 states have internal predecessors, (20531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20531 transitions. [2021-12-17 04:35:38,654 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20531 transitions. Word has length 251 [2021-12-17 04:35:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:38,655 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 20531 transitions. [2021-12-17 04:35:38,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20531 transitions. [2021-12-17 04:35:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-17 04:35:38,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:38,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:35:38,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:35:38,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash -97634127, now seen corresponding path program 1 times [2021-12-17 04:35:38,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111464239] [2021-12-17 04:35:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:38,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:35:38,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:38,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111464239] [2021-12-17 04:35:38,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111464239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:38,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:38,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958846452] [2021-12-17 04:35:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:35:38,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:35:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:35:38,779 INFO L87 Difference]: Start difference. First operand 15775 states and 20531 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:41,710 INFO L93 Difference]: Finished difference Result 31587 states and 41098 transitions. [2021-12-17 04:35:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:35:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-12-17 04:35:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:41,733 INFO L225 Difference]: With dead ends: 31587 [2021-12-17 04:35:41,733 INFO L226 Difference]: Without dead ends: 15777 [2021-12-17 04:35:41,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:35:41,749 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:41,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 402 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:35:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-12-17 04:35:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15775. [2021-12-17 04:35:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2801445416508177) internal successors, (20193), 15774 states have internal predecessors, (20193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20193 transitions. [2021-12-17 04:35:41,929 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20193 transitions. Word has length 256 [2021-12-17 04:35:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:41,930 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 20193 transitions. [2021-12-17 04:35:41,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20193 transitions. [2021-12-17 04:35:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-17 04:35:41,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:41,932 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:35:41,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:35:41,933 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash -469041642, now seen corresponding path program 1 times [2021-12-17 04:35:41,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258666192] [2021-12-17 04:35:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:41,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 83 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 04:35:42,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258666192] [2021-12-17 04:35:42,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258666192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:35:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261957182] [2021-12-17 04:35:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:42,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:35:42,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:35:42,043 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) [2021-12-17 04:35:42,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:35:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:35:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:35:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-17 04:35:42,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:35:42,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261957182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:42,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:35:42,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 04:35:42,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617577118] [2021-12-17 04:35:42,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:42,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:42,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:42,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:42,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:35:42,535 INFO L87 Difference]: Start difference. First operand 15775 states and 20193 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:44,654 INFO L93 Difference]: Finished difference Result 39809 states and 50557 transitions. [2021-12-17 04:35:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-12-17 04:35:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:44,740 INFO L225 Difference]: With dead ends: 39809 [2021-12-17 04:35:44,741 INFO L226 Difference]: Without dead ends: 24036 [2021-12-17 04:35:44,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:35:44,758 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 645 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:44,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 535 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 04:35:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24036 states. [2021-12-17 04:35:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24036 to 23285. [2021-12-17 04:35:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.2352259062016835) internal successors, (28761), 23284 states have internal predecessors, (28761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 28761 transitions. [2021-12-17 04:35:45,097 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 28761 transitions. Word has length 265 [2021-12-17 04:35:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:45,098 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 28761 transitions. [2021-12-17 04:35:45,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 28761 transitions. [2021-12-17 04:35:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-17 04:35:45,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:45,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:35:45,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:35:45,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:35:45,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1294528122, now seen corresponding path program 1 times [2021-12-17 04:35:45,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910685993] [2021-12-17 04:35:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:45,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 04:35:45,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910685993] [2021-12-17 04:35:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910685993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:45,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:45,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:35:45,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961504220] [2021-12-17 04:35:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:45,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:45,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:45,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:45,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:45,417 INFO L87 Difference]: Start difference. First operand 23285 states and 28761 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:48,010 INFO L93 Difference]: Finished difference Result 66094 states and 82217 transitions. [2021-12-17 04:35:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2021-12-17 04:35:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:48,061 INFO L225 Difference]: With dead ends: 66094 [2021-12-17 04:35:48,061 INFO L226 Difference]: Without dead ends: 42811 [2021-12-17 04:35:48,077 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 [2021-12-17 04:35:48,078 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 620 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:48,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 597 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:35:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42811 states. [2021-12-17 04:35:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42811 to 33048. [2021-12-17 04:35:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33048 states, 33047 states have (on average 1.2018337519290707) internal successors, (39717), 33047 states have internal predecessors, (39717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33048 states to 33048 states and 39717 transitions. [2021-12-17 04:35:48,390 INFO L78 Accepts]: Start accepts. Automaton has 33048 states and 39717 transitions. Word has length 278 [2021-12-17 04:35:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:48,391 INFO L470 AbstractCegarLoop]: Abstraction has 33048 states and 39717 transitions. [2021-12-17 04:35:48,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33048 states and 39717 transitions. [2021-12-17 04:35:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-17 04:35:48,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:48,395 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:48,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:35:48,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash 485264543, now seen corresponding path program 1 times [2021-12-17 04:35:48,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:48,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425782753] [2021-12-17 04:35:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:48,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 04:35:48,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425782753] [2021-12-17 04:35:48,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425782753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:48,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:48,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:48,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858745518] [2021-12-17 04:35:48,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:48,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:48,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:48,499 INFO L87 Difference]: Start difference. First operand 33048 states and 39717 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:51,344 INFO L93 Difference]: Finished difference Result 84869 states and 103327 transitions. [2021-12-17 04:35:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2021-12-17 04:35:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:51,441 INFO L225 Difference]: With dead ends: 84869 [2021-12-17 04:35:51,441 INFO L226 Difference]: Without dead ends: 51823 [2021-12-17 04:35:51,485 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 [2021-12-17 04:35:51,486 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:51,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:35:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51823 states. [2021-12-17 04:35:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51823 to 48819. [2021-12-17 04:35:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48819 states, 48818 states have (on average 1.2116227620959483) internal successors, (59149), 48818 states have internal predecessors, (59149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 59149 transitions. [2021-12-17 04:35:52,393 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 59149 transitions. Word has length 357 [2021-12-17 04:35:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:52,394 INFO L470 AbstractCegarLoop]: Abstraction has 48819 states and 59149 transitions. [2021-12-17 04:35:52,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 59149 transitions. [2021-12-17 04:35:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-17 04:35:52,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:52,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:35:52,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:35:52,415 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash 93657291, now seen corresponding path program 1 times [2021-12-17 04:35:52,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:52,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064752565] [2021-12-17 04:35:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:52,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 101 proven. 24 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 04:35:52,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064752565] [2021-12-17 04:35:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064752565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:35:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463007402] [2021-12-17 04:35:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:52,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:35:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:35:52,569 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) [2021-12-17 04:35:52,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:35:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:35:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:35:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 04:35:53,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:35:53,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463007402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:53,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:35:53,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:35:53,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138626800] [2021-12-17 04:35:53,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:53,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:53,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:35:53,430 INFO L87 Difference]: Start difference. First operand 48819 states and 59149 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:55,546 INFO L93 Difference]: Finished difference Result 107399 states and 129252 transitions. [2021-12-17 04:35:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 372 [2021-12-17 04:35:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:55,805 INFO L225 Difference]: With dead ends: 107399 [2021-12-17 04:35:55,805 INFO L226 Difference]: Without dead ends: 55578 [2021-12-17 04:35:55,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:35:55,826 INFO L933 BasicCegarLoop]: 1387 mSDtfsCounter, 710 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:55,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 1395 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 04:35:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55578 states. [2021-12-17 04:35:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55578 to 54827. [2021-12-17 04:35:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54827 states, 54826 states have (on average 1.1799693576040564) internal successors, (64693), 54826 states have internal predecessors, (64693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54827 states to 54827 states and 64693 transitions. [2021-12-17 04:35:56,640 INFO L78 Accepts]: Start accepts. Automaton has 54827 states and 64693 transitions. Word has length 372 [2021-12-17 04:35:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:35:56,641 INFO L470 AbstractCegarLoop]: Abstraction has 54827 states and 64693 transitions. [2021-12-17 04:35:56,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 54827 states and 64693 transitions. [2021-12-17 04:35:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-17 04:35:56,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:35:56,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-17 04:35:56,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:35:56,878 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 [2021-12-17 04:35:56,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:35:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:35:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1126844578, now seen corresponding path program 1 times [2021-12-17 04:35:56,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:35:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398717917] [2021-12-17 04:35:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:35:56,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:35:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:35:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-17 04:35:57,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:35:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398717917] [2021-12-17 04:35:57,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398717917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:35:57,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:35:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:35:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127650063] [2021-12-17 04:35:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:35:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:35:57,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:35:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:35:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:35:57,117 INFO L87 Difference]: Start difference. First operand 54827 states and 64693 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:35:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:35:59,642 INFO L93 Difference]: Finished difference Result 137439 states and 161875 transitions. [2021-12-17 04:35:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:35:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 403 [2021-12-17 04:35:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:35:59,753 INFO L225 Difference]: With dead ends: 137439 [2021-12-17 04:35:59,754 INFO L226 Difference]: Without dead ends: 82614 [2021-12-17 04:35:59,779 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 [2021-12-17 04:35:59,780 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 732 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:35:59,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 159 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 04:35:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82614 states. [2021-12-17 04:36:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82614 to 78108. [2021-12-17 04:36:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78108 states, 78107 states have (on average 1.1731214871906488) internal successors, (91629), 78107 states have internal predecessors, (91629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78108 states to 78108 states and 91629 transitions. [2021-12-17 04:36:00,789 INFO L78 Accepts]: Start accepts. Automaton has 78108 states and 91629 transitions. Word has length 403 [2021-12-17 04:36:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:00,790 INFO L470 AbstractCegarLoop]: Abstraction has 78108 states and 91629 transitions. [2021-12-17 04:36:00,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 78108 states and 91629 transitions. [2021-12-17 04:36:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-17 04:36:00,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:00,794 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 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] [2021-12-17 04:36:00,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:36:00,794 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:00,795 INFO L85 PathProgramCache]: Analyzing trace with hash -61006828, now seen corresponding path program 1 times [2021-12-17 04:36:00,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:00,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583027098] [2021-12-17 04:36:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:00,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-17 04:36:00,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583027098] [2021-12-17 04:36:00,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583027098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:00,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:00,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:00,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527135789] [2021-12-17 04:36:00,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:00,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:00,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:00,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:00,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:00,880 INFO L87 Difference]: Start difference. First operand 78108 states and 91629 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:03,358 INFO L93 Difference]: Finished difference Result 158467 states and 185569 transitions. [2021-12-17 04:36:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2021-12-17 04:36:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:03,444 INFO L225 Difference]: With dead ends: 158467 [2021-12-17 04:36:03,444 INFO L226 Difference]: Without dead ends: 79610 [2021-12-17 04:36:03,477 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 [2021-12-17 04:36:03,479 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:03,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 995 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:36:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79610 states. [2021-12-17 04:36:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79610 to 66843. [2021-12-17 04:36:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66843 states, 66842 states have (on average 1.121974207833398) internal successors, (74995), 66842 states have internal predecessors, (74995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66843 states to 66843 states and 74995 transitions. [2021-12-17 04:36:04,536 INFO L78 Accepts]: Start accepts. Automaton has 66843 states and 74995 transitions. Word has length 423 [2021-12-17 04:36:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:04,542 INFO L470 AbstractCegarLoop]: Abstraction has 66843 states and 74995 transitions. [2021-12-17 04:36:04,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66843 states and 74995 transitions. [2021-12-17 04:36:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-12-17 04:36:04,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:04,549 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:04,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:36:04,549 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash -382046, now seen corresponding path program 1 times [2021-12-17 04:36:04,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:04,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308615580] [2021-12-17 04:36:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:04,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-17 04:36:04,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:04,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308615580] [2021-12-17 04:36:04,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308615580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:04,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:04,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097556510] [2021-12-17 04:36:04,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:04,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:04,683 INFO L87 Difference]: Start difference. First operand 66843 states and 74995 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:07,785 INFO L93 Difference]: Finished difference Result 141194 states and 158081 transitions. [2021-12-17 04:36:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 447 [2021-12-17 04:36:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:07,881 INFO L225 Difference]: With dead ends: 141194 [2021-12-17 04:36:07,881 INFO L226 Difference]: Without dead ends: 75104 [2021-12-17 04:36:07,903 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 [2021-12-17 04:36:07,905 INFO L933 BasicCegarLoop]: 1267 mSDtfsCounter, 591 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:07,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 1275 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:36:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75104 states. [2021-12-17 04:36:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75104 to 74353. [2021-12-17 04:36:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74353 states, 74352 states have (on average 1.1028620615450828) internal successors, (82000), 74352 states have internal predecessors, (82000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74353 states to 74353 states and 82000 transitions. [2021-12-17 04:36:08,774 INFO L78 Accepts]: Start accepts. Automaton has 74353 states and 82000 transitions. Word has length 447 [2021-12-17 04:36:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:08,775 INFO L470 AbstractCegarLoop]: Abstraction has 74353 states and 82000 transitions. [2021-12-17 04:36:08,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 74353 states and 82000 transitions. [2021-12-17 04:36:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-17 04:36:08,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:08,790 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:08,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:36:08,790 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1592881893, now seen corresponding path program 1 times [2021-12-17 04:36:08,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:08,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101878702] [2021-12-17 04:36:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:08,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-17 04:36:09,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:09,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101878702] [2021-12-17 04:36:09,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101878702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:09,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:09,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:09,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362926646] [2021-12-17 04:36:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:09,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:09,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:09,250 INFO L87 Difference]: Start difference. First operand 74353 states and 82000 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:11,933 INFO L93 Difference]: Finished difference Result 168981 states and 186880 transitions. [2021-12-17 04:36:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2021-12-17 04:36:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:12,027 INFO L225 Difference]: With dead ends: 168981 [2021-12-17 04:36:12,027 INFO L226 Difference]: Without dead ends: 95381 [2021-12-17 04:36:12,057 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 [2021-12-17 04:36:12,058 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 596 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:12,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1328 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:36:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2021-12-17 04:36:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 94630. [2021-12-17 04:36:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94630 states, 94629 states have (on average 1.0894334717686966) internal successors, (103092), 94629 states have internal predecessors, (103092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94630 states to 94630 states and 103092 transitions. [2021-12-17 04:36:13,202 INFO L78 Accepts]: Start accepts. Automaton has 94630 states and 103092 transitions. Word has length 469 [2021-12-17 04:36:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:13,203 INFO L470 AbstractCegarLoop]: Abstraction has 94630 states and 103092 transitions. [2021-12-17 04:36:13,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 94630 states and 103092 transitions. [2021-12-17 04:36:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-17 04:36:13,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:13,211 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:36:13,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:36:13,212 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash -219030606, now seen corresponding path program 1 times [2021-12-17 04:36:13,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:13,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088987352] [2021-12-17 04:36:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:13,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-17 04:36:13,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088987352] [2021-12-17 04:36:13,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088987352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:13,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:13,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:13,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497889792] [2021-12-17 04:36:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:13,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:13,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:13,389 INFO L87 Difference]: Start difference. First operand 94630 states and 103092 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:16,305 INFO L93 Difference]: Finished difference Result 185503 states and 202346 transitions. [2021-12-17 04:36:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2021-12-17 04:36:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:16,418 INFO L225 Difference]: With dead ends: 185503 [2021-12-17 04:36:16,418 INFO L226 Difference]: Without dead ends: 91626 [2021-12-17 04:36:16,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:16,466 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 760 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:16,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 135 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:36:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91626 states. [2021-12-17 04:36:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91626 to 90875. [2021-12-17 04:36:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.075159011378392) internal successors, (97704), 90874 states have internal predecessors, (97704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 97704 transitions. [2021-12-17 04:36:17,788 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 97704 transitions. Word has length 470 [2021-12-17 04:36:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:17,789 INFO L470 AbstractCegarLoop]: Abstraction has 90875 states and 97704 transitions. [2021-12-17 04:36:17,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 97704 transitions. [2021-12-17 04:36:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-12-17 04:36:17,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:17,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:17,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:36:17,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash 537389731, now seen corresponding path program 1 times [2021-12-17 04:36:17,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681942887] [2021-12-17 04:36:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:17,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 04:36:17,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:17,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681942887] [2021-12-17 04:36:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681942887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:17,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:17,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:17,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947112301] [2021-12-17 04:36:17,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:17,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:17,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:17,934 INFO L87 Difference]: Start difference. First operand 90875 states and 97704 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:20,493 INFO L93 Difference]: Finished difference Result 189258 states and 203300 transitions. [2021-12-17 04:36:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 484 [2021-12-17 04:36:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:20,607 INFO L225 Difference]: With dead ends: 189258 [2021-12-17 04:36:20,608 INFO L226 Difference]: Without dead ends: 99136 [2021-12-17 04:36:20,650 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 [2021-12-17 04:36:20,651 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 595 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:20,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1315 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:36:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99136 states. [2021-12-17 04:36:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99136 to 96883. [2021-12-17 04:36:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96883 states, 96882 states have (on average 1.071901901281972) internal successors, (103848), 96882 states have internal predecessors, (103848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96883 states to 96883 states and 103848 transitions. [2021-12-17 04:36:21,736 INFO L78 Accepts]: Start accepts. Automaton has 96883 states and 103848 transitions. Word has length 484 [2021-12-17 04:36:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:21,737 INFO L470 AbstractCegarLoop]: Abstraction has 96883 states and 103848 transitions. [2021-12-17 04:36:21,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 96883 states and 103848 transitions. [2021-12-17 04:36:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-12-17 04:36:21,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:21,743 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 04:36:21,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:36:21,743 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1288457650, now seen corresponding path program 1 times [2021-12-17 04:36:21,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319444792] [2021-12-17 04:36:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:21,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-12-17 04:36:21,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:21,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319444792] [2021-12-17 04:36:21,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319444792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:21,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:21,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:21,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931333163] [2021-12-17 04:36:21,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:21,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:21,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:21,848 INFO L87 Difference]: Start difference. First operand 96883 states and 103848 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:24,747 INFO L93 Difference]: Finished difference Result 193013 states and 206938 transitions. [2021-12-17 04:36:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:24,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 503 [2021-12-17 04:36:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:24,855 INFO L225 Difference]: With dead ends: 193013 [2021-12-17 04:36:24,855 INFO L226 Difference]: Without dead ends: 96883 [2021-12-17 04:36:24,907 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 [2021-12-17 04:36:24,908 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 747 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:24,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1278 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:36:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96883 states. [2021-12-17 04:36:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96883 to 90875. [2021-12-17 04:36:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.053293571318529) internal successors, (95717), 90874 states have internal predecessors, (95717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 95717 transitions. [2021-12-17 04:36:26,331 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 95717 transitions. Word has length 503 [2021-12-17 04:36:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 90875 states and 95717 transitions. [2021-12-17 04:36:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 95717 transitions. [2021-12-17 04:36:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-12-17 04:36:26,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:26,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:26,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:36:26,340 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1439974613, now seen corresponding path program 1 times [2021-12-17 04:36:26,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:26,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029691713] [2021-12-17 04:36:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:26,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:36:26,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029691713] [2021-12-17 04:36:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029691713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:26,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:26,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030746117] [2021-12-17 04:36:26,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:26,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:26,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:26,507 INFO L87 Difference]: Start difference. First operand 90875 states and 95717 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:29,286 INFO L93 Difference]: Finished difference Result 180997 states and 190676 transitions. [2021-12-17 04:36:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 508 [2021-12-17 04:36:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:29,414 INFO L225 Difference]: With dead ends: 180997 [2021-12-17 04:36:29,415 INFO L226 Difference]: Without dead ends: 90875 [2021-12-17 04:36:29,443 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 [2021-12-17 04:36:29,449 INFO L933 BasicCegarLoop]: 1171 mSDtfsCounter, 731 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:29,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 1179 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 04:36:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-12-17 04:36:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 90124. [2021-12-17 04:36:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90124 states, 90123 states have (on average 1.0423421324190274) internal successors, (93939), 90123 states have internal predecessors, (93939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90124 states to 90124 states and 93939 transitions. [2021-12-17 04:36:30,550 INFO L78 Accepts]: Start accepts. Automaton has 90124 states and 93939 transitions. Word has length 508 [2021-12-17 04:36:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 90124 states and 93939 transitions. [2021-12-17 04:36:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 90124 states and 93939 transitions. [2021-12-17 04:36:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-12-17 04:36:30,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:30,558 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2021-12-17 04:36:30,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 04:36:30,558 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 366156598, now seen corresponding path program 1 times [2021-12-17 04:36:30,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462752714] [2021-12-17 04:36:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:30,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-17 04:36:30,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462752714] [2021-12-17 04:36:30,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462752714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:30,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:30,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:30,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358043144] [2021-12-17 04:36:30,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:30,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:30,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:30,696 INFO L87 Difference]: Start difference. First operand 90124 states and 93939 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:33,832 INFO L93 Difference]: Finished difference Result 224555 states and 234756 transitions. [2021-12-17 04:36:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:33,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2021-12-17 04:36:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:34,032 INFO L225 Difference]: With dead ends: 224555 [2021-12-17 04:36:34,032 INFO L226 Difference]: Without dead ends: 135184 [2021-12-17 04:36:34,100 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 [2021-12-17 04:36:34,101 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 754 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:34,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1180 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:36:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135184 states. [2021-12-17 04:36:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135184 to 129927. [2021-12-17 04:36:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129927 states, 129926 states have (on average 1.0409848683096532) internal successors, (135251), 129926 states have internal predecessors, (135251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129927 states to 129927 states and 135251 transitions. [2021-12-17 04:36:36,068 INFO L78 Accepts]: Start accepts. Automaton has 129927 states and 135251 transitions. Word has length 528 [2021-12-17 04:36:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:36,069 INFO L470 AbstractCegarLoop]: Abstraction has 129927 states and 135251 transitions. [2021-12-17 04:36:36,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 129927 states and 135251 transitions. [2021-12-17 04:36:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2021-12-17 04:36:36,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:36,082 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:36,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 04:36:36,082 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 302124925, now seen corresponding path program 1 times [2021-12-17 04:36:36,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:36,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696933479] [2021-12-17 04:36:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:36,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-17 04:36:36,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:36,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696933479] [2021-12-17 04:36:36,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696933479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:36,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:36,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:36,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931636590] [2021-12-17 04:36:36,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:36,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:36,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:36,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:36,223 INFO L87 Difference]: Start difference. First operand 129927 states and 135251 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:38,698 INFO L93 Difference]: Finished difference Result 259852 states and 270498 transitions. [2021-12-17 04:36:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:38,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 597 [2021-12-17 04:36:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:38,846 INFO L225 Difference]: With dead ends: 259852 [2021-12-17 04:36:38,846 INFO L226 Difference]: Without dead ends: 129927 [2021-12-17 04:36:38,892 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 [2021-12-17 04:36:38,893 INFO L933 BasicCegarLoop]: 1198 mSDtfsCounter, 670 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:38,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 1206 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 04:36:38,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129927 states. [2021-12-17 04:36:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129927 to 124670. [2021-12-17 04:36:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124670 states, 124669 states have (on average 1.0331758496498729) internal successors, (128805), 124669 states have internal predecessors, (128805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124670 states to 124670 states and 128805 transitions. [2021-12-17 04:36:40,333 INFO L78 Accepts]: Start accepts. Automaton has 124670 states and 128805 transitions. Word has length 597 [2021-12-17 04:36:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:40,334 INFO L470 AbstractCegarLoop]: Abstraction has 124670 states and 128805 transitions. [2021-12-17 04:36:40,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 124670 states and 128805 transitions. [2021-12-17 04:36:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2021-12-17 04:36:40,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:40,351 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:40,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 04:36:40,351 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:40,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:40,351 INFO L85 PathProgramCache]: Analyzing trace with hash 333896575, now seen corresponding path program 1 times [2021-12-17 04:36:40,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:40,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739226114] [2021-12-17 04:36:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:40,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2021-12-17 04:36:40,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739226114] [2021-12-17 04:36:40,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739226114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:40,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:40,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:40,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065831258] [2021-12-17 04:36:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:40,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:40,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:40,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:40,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:40,900 INFO L87 Difference]: Start difference. First operand 124670 states and 128805 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:44,593 INFO L93 Difference]: Finished difference Result 290643 states and 300904 transitions. [2021-12-17 04:36:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 645 [2021-12-17 04:36:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:44,812 INFO L225 Difference]: With dead ends: 290643 [2021-12-17 04:36:44,813 INFO L226 Difference]: Without dead ends: 166726 [2021-12-17 04:36:44,905 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 [2021-12-17 04:36:44,906 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 778 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:44,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1042 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:36:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166726 states. [2021-12-17 04:36:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166726 to 159967. [2021-12-17 04:36:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159967 states, 159966 states have (on average 1.0354012727704638) internal successors, (165629), 159966 states have internal predecessors, (165629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159967 states to 159967 states and 165629 transitions. [2021-12-17 04:36:46,575 INFO L78 Accepts]: Start accepts. Automaton has 159967 states and 165629 transitions. Word has length 645 [2021-12-17 04:36:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:46,575 INFO L470 AbstractCegarLoop]: Abstraction has 159967 states and 165629 transitions. [2021-12-17 04:36:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 159967 states and 165629 transitions. [2021-12-17 04:36:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2021-12-17 04:36:46,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:46,592 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:46,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 04:36:46,599 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1653208385, now seen corresponding path program 1 times [2021-12-17 04:36:46,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:46,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971398077] [2021-12-17 04:36:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:46,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 846 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-17 04:36:47,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971398077] [2021-12-17 04:36:47,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971398077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:47,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:47,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:47,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740392725] [2021-12-17 04:36:47,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:47,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:47,150 INFO L87 Difference]: Start difference. First operand 159967 states and 165629 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:50,001 INFO L93 Difference]: Finished difference Result 319181 states and 330500 transitions. [2021-12-17 04:36:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 680 [2021-12-17 04:36:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:50,216 INFO L225 Difference]: With dead ends: 319181 [2021-12-17 04:36:50,217 INFO L226 Difference]: Without dead ends: 159967 [2021-12-17 04:36:50,336 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 [2021-12-17 04:36:50,337 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 653 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:50,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 488 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 04:36:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159967 states.