./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/Problem16_label01.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 67c147095efb46de95e554e09305e6c24ee3dfebae2911ec90ba2508ef10e1b1 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:40:34,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:40:34,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:40:34,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:40:34,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:40:34,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:40:34,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:40:34,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:40:34,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:40:34,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:40:34,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:40:34,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:40:34,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:40:34,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:40:34,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:40:34,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:40:34,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:40:34,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:40:34,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:40:34,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:40:34,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:40:34,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:40:34,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:40:34,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:40:34,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:40:34,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:40:34,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:40:34,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:40:34,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:40:34,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:40:34,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:40:34,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:40:34,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:40:34,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:40:34,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:40:34,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:40:34,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:40:34,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:40:34,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:40:34,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:40:34,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:40:34,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:40:34,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:40:34,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:40:34,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:40:34,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:40:34,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:40:34,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:40:34,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:40:34,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:40:34,302 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:40:34,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:40:34,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:40:34,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:40:34,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:40:34,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:40:34,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:40:34,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:40:34,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:40:34,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:40:34,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:40:34,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:40:34,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:40:34,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:40:34,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:40:34,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:40:34,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:40:34,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:40:34,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:40:34,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:40:34,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67c147095efb46de95e554e09305e6c24ee3dfebae2911ec90ba2508ef10e1b1 [2021-12-14 12:40:34,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:40:34,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:40:34,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:40:34,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:40:34,496 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:40:34,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label01.c [2021-12-14 12:40:34,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7b74472/322b48a2883445b78f56661eab36d476/FLAG726b779f6 [2021-12-14 12:40:34,955 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:40:34,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label01.c [2021-12-14 12:40:34,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7b74472/322b48a2883445b78f56661eab36d476/FLAG726b779f6 [2021-12-14 12:40:35,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7b74472/322b48a2883445b78f56661eab36d476 [2021-12-14 12:40:35,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:40:35,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:40:35,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:40:35,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:40:35,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:40:35,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:35,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6502edd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35, skipping insertion in model container [2021-12-14 12:40:35,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:35,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:40:35,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:40:35,495 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/Problem16_label01.c[2910,2923] [2021-12-14 12:40:35,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:40:35,740 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:40:35,766 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/Problem16_label01.c[2910,2923] [2021-12-14 12:40:35,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:40:35,872 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:40:35,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35 WrapperNode [2021-12-14 12:40:35,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:40:35,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:40:35,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:40:35,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:40:35,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:35,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,008 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-14 12:40:36,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:40:36,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:40:36,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:40:36,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:40:36,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:40:36,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:40:36,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:40:36,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:40:36,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (1/1) ... [2021-12-14 12:40:36,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:40:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:40:36,177 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) [2021-12-14 12:40:36,203 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 [2021-12-14 12:40:36,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:40:36,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:40:36,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:40:36,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:40:36,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:40:36,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:40:37,540 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:40:37,549 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:40:37,549 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 12:40:37,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:40:37 BoogieIcfgContainer [2021-12-14 12:40:37,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:40:37,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:40:37,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:40:37,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:40:37,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:40:35" (1/3) ... [2021-12-14 12:40:37,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:40:37, skipping insertion in model container [2021-12-14 12:40:37,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:35" (2/3) ... [2021-12-14 12:40:37,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:40:37, skipping insertion in model container [2021-12-14 12:40:37,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:40:37" (3/3) ... [2021-12-14 12:40:37,557 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label01.c [2021-12-14 12:40:37,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:40:37,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:40:37,593 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:40:37,598 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 [2021-12-14 12:40:37,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:40:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 12:40:37,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:37,618 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] [2021-12-14 12:40:37,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2021-12-14 12:40:37,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:37,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527925543] [2021-12-14 12:40:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:37,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:37,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527925543] [2021-12-14 12:40:37,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527925543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:37,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:37,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:37,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237614085] [2021-12-14 12:40:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:37,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:37,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:37,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:37,818 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:39,348 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-14 12:40:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 12:40:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:39,380 INFO L225 Difference]: With dead ends: 1137 [2021-12-14 12:40:39,380 INFO L226 Difference]: Without dead ends: 662 [2021-12-14 12:40:39,386 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 [2021-12-14 12:40:39,389 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 358 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:39,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 12:40:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-14 12:40:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-14 12:40:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions. [2021-12-14 12:40:39,455 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 26 [2021-12-14 12:40:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:39,457 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions. [2021-12-14 12:40:39,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions. [2021-12-14 12:40:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 12:40:39,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:39,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:39,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:40:39,460 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 331722233, now seen corresponding path program 1 times [2021-12-14 12:40:39,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:39,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169216447] [2021-12-14 12:40:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:39,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:39,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169216447] [2021-12-14 12:40:39,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169216447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:39,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:39,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:39,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440651001] [2021-12-14 12:40:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:39,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:39,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:39,563 INFO L87 Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:40,704 INFO L93 Difference]: Finished difference Result 1980 states and 3367 transitions. [2021-12-14 12:40:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-14 12:40:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:40,709 INFO L225 Difference]: With dead ends: 1980 [2021-12-14 12:40:40,709 INFO L226 Difference]: Without dead ends: 1320 [2021-12-14 12:40:40,710 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 [2021-12-14 12:40:40,711 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:40,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 12:40:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-14 12:40:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-14 12:40:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions. [2021-12-14 12:40:40,742 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 92 [2021-12-14 12:40:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:40,744 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions. [2021-12-14 12:40:40,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions. [2021-12-14 12:40:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 12:40:40,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:40,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:40,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:40:40,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1037882789, now seen corresponding path program 1 times [2021-12-14 12:40:40,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869537315] [2021-12-14 12:40:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:40,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:40,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869537315] [2021-12-14 12:40:40,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869537315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:40,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:40,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:40,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562862163] [2021-12-14 12:40:40,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:40,836 INFO L87 Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:41,844 INFO L93 Difference]: Finished difference Result 3296 states and 5285 transitions. [2021-12-14 12:40:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-14 12:40:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:41,850 INFO L225 Difference]: With dead ends: 3296 [2021-12-14 12:40:41,850 INFO L226 Difference]: Without dead ends: 1978 [2021-12-14 12:40:41,852 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 [2021-12-14 12:40:41,852 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:41,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:40:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-14 12:40:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-14 12:40:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions. [2021-12-14 12:40:41,882 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 93 [2021-12-14 12:40:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions. [2021-12-14 12:40:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions. [2021-12-14 12:40:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-14 12:40:41,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:41,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:41,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:40:41,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash 577723381, now seen corresponding path program 1 times [2021-12-14 12:40:41,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:41,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983242982] [2021-12-14 12:40:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:41,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983242982] [2021-12-14 12:40:41,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983242982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:41,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:41,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:41,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110429712] [2021-12-14 12:40:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:41,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:41,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:41,969 INFO L87 Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:42,991 INFO L93 Difference]: Finished difference Result 5928 states and 7897 transitions. [2021-12-14 12:40:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:42,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-14 12:40:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:43,002 INFO L225 Difference]: With dead ends: 5928 [2021-12-14 12:40:43,002 INFO L226 Difference]: Without dead ends: 3952 [2021-12-14 12:40:43,005 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 [2021-12-14 12:40:43,006 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:43,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 257 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:40:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-14 12:40:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-14 12:40:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.2171602126044039) internal successors, (4809), 3951 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4809 transitions. [2021-12-14 12:40:43,060 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4809 transitions. Word has length 185 [2021-12-14 12:40:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:43,061 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4809 transitions. [2021-12-14 12:40:43,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4809 transitions. [2021-12-14 12:40:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-14 12:40:43,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:43,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:43,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:40:43,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash -932017501, now seen corresponding path program 1 times [2021-12-14 12:40:43,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:43,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941402720] [2021-12-14 12:40:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:43,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 12:40:43,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:43,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941402720] [2021-12-14 12:40:43,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941402720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:40:43,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437631032] [2021-12-14 12:40:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:43,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:40:43,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:40:43,216 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) [2021-12-14 12:40:43,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 12:40:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:40:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:40:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 12:40:43,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:40:43,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437631032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:43,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:40:43,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-14 12:40:43,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215510258] [2021-12-14 12:40:43,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:43,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:43,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:40:43,899 INFO L87 Difference]: Start difference. First operand 3952 states and 4809 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:44,963 INFO L93 Difference]: Finished difference Result 5270 states and 6254 transitions. [2021-12-14 12:40:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 269 [2021-12-14 12:40:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:44,979 INFO L225 Difference]: With dead ends: 5270 [2021-12-14 12:40:44,982 INFO L226 Difference]: Without dead ends: 5268 [2021-12-14 12:40:44,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:40:44,986 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 109 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:44,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 158 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:40:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-14 12:40:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610. [2021-12-14 12:40:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.2013451941852897) internal successors, (5537), 4609 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5537 transitions. [2021-12-14 12:40:45,082 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5537 transitions. Word has length 269 [2021-12-14 12:40:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:45,089 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5537 transitions. [2021-12-14 12:40:45,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5537 transitions. [2021-12-14 12:40:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-14 12:40:45,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:45,095 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:45,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 12:40:45,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:40:45,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 976027379, now seen corresponding path program 1 times [2021-12-14 12:40:45,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664531669] [2021-12-14 12:40:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:45,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 12:40:45,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:45,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664531669] [2021-12-14 12:40:45,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664531669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:45,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:45,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:40:45,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489784048] [2021-12-14 12:40:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:45,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:40:45,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:40:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:40:45,453 INFO L87 Difference]: Start difference. First operand 4610 states and 5537 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:46,541 INFO L93 Difference]: Finished difference Result 9588 states and 11454 transitions. [2021-12-14 12:40:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 12:40:46,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 378 [2021-12-14 12:40:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:46,553 INFO L225 Difference]: With dead ends: 9588 [2021-12-14 12:40:46,554 INFO L226 Difference]: Without dead ends: 4980 [2021-12-14 12:40:46,559 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 [2021-12-14 12:40:46,559 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:46,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:40:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2021-12-14 12:40:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 4939. [2021-12-14 12:40:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.1891454029971649) internal successors, (5872), 4938 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5872 transitions. [2021-12-14 12:40:46,626 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5872 transitions. Word has length 378 [2021-12-14 12:40:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:46,627 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5872 transitions. [2021-12-14 12:40:46,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5872 transitions. [2021-12-14 12:40:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-12-14 12:40:46,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:46,632 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 12:40:46,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:40:46,633 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash 884345414, now seen corresponding path program 1 times [2021-12-14 12:40:46,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392928877] [2021-12-14 12:40:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:46,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-14 12:40:46,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392928877] [2021-12-14 12:40:46,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392928877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:40:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122789405] [2021-12-14 12:40:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:46,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:40:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:40:46,786 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) [2021-12-14 12:40:46,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 12:40:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 12:40:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:40:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-14 12:40:47,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 12:40:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-14 12:40:50,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122789405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 12:40:50,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 12:40:50,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-14 12:40:50,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097000934] [2021-12-14 12:40:50,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 12:40:50,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 12:40:50,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 12:40:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-14 12:40:50,819 INFO L87 Difference]: Start difference. First operand 4939 states and 5872 transitions. Second operand has 8 states, 8 states have (on average 98.375) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:55,434 INFO L93 Difference]: Finished difference Result 16127 states and 19198 transitions. [2021-12-14 12:40:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 12:40:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 98.375) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 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 440 [2021-12-14 12:40:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:55,462 INFO L225 Difference]: With dead ends: 16127 [2021-12-14 12:40:55,462 INFO L226 Difference]: Without dead ends: 11519 [2021-12-14 12:40:55,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 12:40:55,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1676 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 4041 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 4041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:55,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 41 Invalid, 5402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 4041 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-14 12:40:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-14 12:40:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 7900. [2021-12-14 12:40:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.1711609064438537) internal successors, (9251), 7899 states have internal predecessors, (9251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 9251 transitions. [2021-12-14 12:40:55,615 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 9251 transitions. Word has length 440 [2021-12-14 12:40:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:55,616 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 9251 transitions. [2021-12-14 12:40:55,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.375) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 9251 transitions. [2021-12-14 12:40:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-12-14 12:40:55,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:55,622 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:55,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 12:40:55,835 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,SelfDestructingSolverStorable6 [2021-12-14 12:40:55,836 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1086070078, now seen corresponding path program 1 times [2021-12-14 12:40:55,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760511128] [2021-12-14 12:40:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:55,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-14 12:40:56,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:56,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760511128] [2021-12-14 12:40:56,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760511128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:56,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:56,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 12:40:56,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352976130] [2021-12-14 12:40:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:56,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 12:40:56,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 12:40:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:40:56,012 INFO L87 Difference]: Start difference. First operand 7900 states and 9251 transitions. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:57,415 INFO L93 Difference]: Finished difference Result 15512 states and 18192 transitions. [2021-12-14 12:40:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 12:40:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 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 465 [2021-12-14 12:40:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:57,426 INFO L225 Difference]: With dead ends: 15512 [2021-12-14 12:40:57,427 INFO L226 Difference]: Without dead ends: 7291 [2021-12-14 12:40:57,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:40:57,434 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 378 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:57,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 291 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 12:40:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-12-14 12:40:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 7267. [2021-12-14 12:40:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 1.076245527112579) internal successors, (7820), 7266 states have internal predecessors, (7820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 7820 transitions. [2021-12-14 12:40:57,518 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 7820 transitions. Word has length 465 [2021-12-14 12:40:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:57,518 INFO L470 AbstractCegarLoop]: Abstraction has 7267 states and 7820 transitions. [2021-12-14 12:40:57,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 7820 transitions. [2021-12-14 12:40:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-12-14 12:40:57,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:57,525 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:57,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:40:57,525 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:57,526 INFO L85 PathProgramCache]: Analyzing trace with hash -225867367, now seen corresponding path program 1 times [2021-12-14 12:40:57,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:57,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6383445] [2021-12-14 12:40:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:57,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 12:40:57,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:57,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6383445] [2021-12-14 12:40:57,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6383445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:57,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:57,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:40:57,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298735297] [2021-12-14 12:40:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:57,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:57,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:57,632 INFO L87 Difference]: Start difference. First operand 7267 states and 7820 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:58,520 INFO L93 Difference]: Finished difference Result 16177 states and 17518 transitions. [2021-12-14 12:40:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 527 [2021-12-14 12:40:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:58,536 INFO L225 Difference]: With dead ends: 16177 [2021-12-14 12:40:58,536 INFO L226 Difference]: Without dead ends: 9241 [2021-12-14 12:40:58,545 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 [2021-12-14 12:40:58,546 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 171 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:58,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 456 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 12:40:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-12-14 12:40:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 7925. [2021-12-14 12:40:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7925 states, 7924 states have (on average 1.0663806158505804) internal successors, (8450), 7924 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7925 states to 7925 states and 8450 transitions. [2021-12-14 12:40:58,654 INFO L78 Accepts]: Start accepts. Automaton has 7925 states and 8450 transitions. Word has length 527 [2021-12-14 12:40:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:58,655 INFO L470 AbstractCegarLoop]: Abstraction has 7925 states and 8450 transitions. [2021-12-14 12:40:58,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7925 states and 8450 transitions. [2021-12-14 12:40:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-14 12:40:58,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:58,661 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 12:40:58,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 12:40:58,662 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1756168535, now seen corresponding path program 1 times [2021-12-14 12:40:58,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:58,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872057112] [2021-12-14 12:40:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:58,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 47 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:58,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872057112] [2021-12-14 12:40:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872057112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:40:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919199524] [2021-12-14 12:40:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:58,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:40:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:40:58,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:40:58,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 12:40:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 12:40:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:40:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:59,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 12:41:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 47 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:41:00,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919199524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 12:41:00,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 12:41:00,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-12-14 12:41:00,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72644471] [2021-12-14 12:41:00,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 12:41:00,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 12:41:00,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 12:41:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-14 12:41:00,928 INFO L87 Difference]: Start difference. First operand 7925 states and 8450 transitions. Second operand has 11 states, 11 states have (on average 146.27272727272728) internal successors, (1609), 10 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:03,312 INFO L93 Difference]: Finished difference Result 22478 states and 23947 transitions. [2021-12-14 12:41:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 12:41:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 146.27272727272728) internal successors, (1609), 10 states have internal predecessors, (1609), 0 states have call successors, (0), 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 537 [2021-12-14 12:41:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:03,334 INFO L225 Difference]: With dead ends: 22478 [2021-12-14 12:41:03,334 INFO L226 Difference]: Without dead ends: 14835 [2021-12-14 12:41:03,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-14 12:41:03,369 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1518 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3543 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 3543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:03,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 56 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 3543 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 12:41:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14835 states. [2021-12-14 12:41:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14835 to 9569. [2021-12-14 12:41:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9569 states, 9568 states have (on average 1.0617683946488294) internal successors, (10159), 9568 states have internal predecessors, (10159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9569 states to 9569 states and 10159 transitions. [2021-12-14 12:41:03,466 INFO L78 Accepts]: Start accepts. Automaton has 9569 states and 10159 transitions. Word has length 537 [2021-12-14 12:41:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:03,467 INFO L470 AbstractCegarLoop]: Abstraction has 9569 states and 10159 transitions. [2021-12-14 12:41:03,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 146.27272727272728) internal successors, (1609), 10 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 9569 states and 10159 transitions. [2021-12-14 12:41:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-12-14 12:41:03,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:03,477 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:03,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:03,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:03,690 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:03,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1288894405, now seen corresponding path program 1 times [2021-12-14 12:41:03,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:03,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049752208] [2021-12-14 12:41:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:03,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 808 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-14 12:41:03,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049752208] [2021-12-14 12:41:03,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049752208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:03,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:03,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:03,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977981260] [2021-12-14 12:41:03,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:03,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:03,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:03,822 INFO L87 Difference]: Start difference. First operand 9569 states and 10159 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:04,539 INFO L93 Difference]: Finished difference Result 21439 states and 22949 transitions. [2021-12-14 12:41:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 668 [2021-12-14 12:41:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:04,557 INFO L225 Difference]: With dead ends: 21439 [2021-12-14 12:41:04,557 INFO L226 Difference]: Without dead ends: 12530 [2021-12-14 12:41:04,565 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 [2021-12-14 12:41:04,565 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 225 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:04,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 39 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12530 states. [2021-12-14 12:41:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12530 to 12530. [2021-12-14 12:41:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 1.0679224199856334) internal successors, (13380), 12529 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 13380 transitions. [2021-12-14 12:41:04,678 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 13380 transitions. Word has length 668 [2021-12-14 12:41:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:04,678 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 13380 transitions. [2021-12-14 12:41:04,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 13380 transitions. [2021-12-14 12:41:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2021-12-14 12:41:04,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:04,688 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:04,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 12:41:04,689 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1338555661, now seen corresponding path program 1 times [2021-12-14 12:41:04,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:04,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355407738] [2021-12-14 12:41:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:04,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 646 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-12-14 12:41:04,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:04,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355407738] [2021-12-14 12:41:04,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355407738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:04,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:04,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:04,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692662380] [2021-12-14 12:41:04,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:04,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:04,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:04,879 INFO L87 Difference]: Start difference. First operand 12530 states and 13380 transitions. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:05,650 INFO L93 Difference]: Finished difference Result 27690 states and 29728 transitions. [2021-12-14 12:41:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:05,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 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 757 [2021-12-14 12:41:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:05,673 INFO L225 Difference]: With dead ends: 27690 [2021-12-14 12:41:05,673 INFO L226 Difference]: Without dead ends: 15820 [2021-12-14 12:41:05,684 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 [2021-12-14 12:41:05,685 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:05,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 442 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15820 states. [2021-12-14 12:41:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15820 to 15162. [2021-12-14 12:41:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15162 states, 15161 states have (on average 1.0593628388628717) internal successors, (16061), 15161 states have internal predecessors, (16061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 16061 transitions. [2021-12-14 12:41:05,850 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 16061 transitions. Word has length 757 [2021-12-14 12:41:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:05,851 INFO L470 AbstractCegarLoop]: Abstraction has 15162 states and 16061 transitions. [2021-12-14 12:41:05,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 16061 transitions. [2021-12-14 12:41:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2021-12-14 12:41:05,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:05,863 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 12:41:05,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 12:41:05,863 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1713260066, now seen corresponding path program 1 times [2021-12-14 12:41:05,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009016293] [2021-12-14 12:41:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:05,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-12-14 12:41:06,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:06,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009016293] [2021-12-14 12:41:06,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009016293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:06,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:06,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:06,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48996940] [2021-12-14 12:41:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:06,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:06,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:06,106 INFO L87 Difference]: Start difference. First operand 15162 states and 16061 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:06,834 INFO L93 Difference]: Finished difference Result 34599 states and 36794 transitions. [2021-12-14 12:41:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 758 [2021-12-14 12:41:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:06,853 INFO L225 Difference]: With dead ends: 34599 [2021-12-14 12:41:06,853 INFO L226 Difference]: Without dead ends: 18781 [2021-12-14 12:41:06,864 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 [2021-12-14 12:41:06,864 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 273 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:06,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 429 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2021-12-14 12:41:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 18452. [2021-12-14 12:41:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18452 states, 18451 states have (on average 1.0428703051325132) internal successors, (19242), 18451 states have internal predecessors, (19242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18452 states to 18452 states and 19242 transitions. [2021-12-14 12:41:07,057 INFO L78 Accepts]: Start accepts. Automaton has 18452 states and 19242 transitions. Word has length 758 [2021-12-14 12:41:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:07,058 INFO L470 AbstractCegarLoop]: Abstraction has 18452 states and 19242 transitions. [2021-12-14 12:41:07,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18452 states and 19242 transitions. [2021-12-14 12:41:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-12-14 12:41:07,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:07,069 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:07,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 12:41:07,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash -73250812, now seen corresponding path program 1 times [2021-12-14 12:41:07,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:07,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985100294] [2021-12-14 12:41:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:07,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-12-14 12:41:07,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:07,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985100294] [2021-12-14 12:41:07,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985100294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:07,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:07,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:07,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354719468] [2021-12-14 12:41:07,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:07,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:07,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:07,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:07,244 INFO L87 Difference]: Start difference. First operand 18452 states and 19242 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) [2021-12-14 12:41:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:07,973 INFO L93 Difference]: Finished difference Result 36244 states and 37819 transitions. [2021-12-14 12:41:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:07,973 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 770 [2021-12-14 12:41:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:07,988 INFO L225 Difference]: With dead ends: 36244 [2021-12-14 12:41:07,988 INFO L226 Difference]: Without dead ends: 18452 [2021-12-14 12:41:07,994 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 [2021-12-14 12:41:07,995 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 251 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 429 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18452 states. [2021-12-14 12:41:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18452 to 18123. [2021-12-14 12:41:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18123 states, 18122 states have (on average 1.0321708420704117) internal successors, (18705), 18122 states have internal predecessors, (18705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18123 states to 18123 states and 18705 transitions. [2021-12-14 12:41:08,144 INFO L78 Accepts]: Start accepts. Automaton has 18123 states and 18705 transitions. Word has length 770 [2021-12-14 12:41:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:08,144 INFO L470 AbstractCegarLoop]: Abstraction has 18123 states and 18705 transitions. [2021-12-14 12:41:08,145 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) [2021-12-14 12:41:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 18123 states and 18705 transitions. [2021-12-14 12:41:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2021-12-14 12:41:08,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:08,155 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:08,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 12:41:08,155 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:08,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1580246159, now seen corresponding path program 1 times [2021-12-14 12:41:08,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:08,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189449120] [2021-12-14 12:41:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:08,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 48 proven. 507 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-14 12:41:08,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189449120] [2021-12-14 12:41:08,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189449120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490343229] [2021-12-14 12:41:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:08,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:08,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:08,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 12:41:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:41:08,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-14 12:41:09,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:09,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490343229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:09,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:09,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 12:41:09,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618208977] [2021-12-14 12:41:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:09,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:09,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:09,430 INFO L87 Difference]: Start difference. First operand 18123 states and 18705 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:10,260 INFO L93 Difference]: Finished difference Result 35586 states and 36745 transitions. [2021-12-14 12:41:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 786 [2021-12-14 12:41:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:10,282 INFO L225 Difference]: With dead ends: 35586 [2021-12-14 12:41:10,282 INFO L226 Difference]: Without dead ends: 18123 [2021-12-14 12:41:10,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:10,293 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 341 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:10,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 377 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18123 states. [2021-12-14 12:41:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18123 to 18123. [2021-12-14 12:41:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18123 states, 18122 states have (on average 1.0290806754221389) internal successors, (18649), 18122 states have internal predecessors, (18649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18123 states to 18123 states and 18649 transitions. [2021-12-14 12:41:10,468 INFO L78 Accepts]: Start accepts. Automaton has 18123 states and 18649 transitions. Word has length 786 [2021-12-14 12:41:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:10,468 INFO L470 AbstractCegarLoop]: Abstraction has 18123 states and 18649 transitions. [2021-12-14 12:41:10,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18123 states and 18649 transitions. [2021-12-14 12:41:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2021-12-14 12:41:10,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:10,484 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:10,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:10,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 12:41:10,702 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -169005392, now seen corresponding path program 1 times [2021-12-14 12:41:10,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545488543] [2021-12-14 12:41:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:10,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 859 proven. 139 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-14 12:41:11,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545488543] [2021-12-14 12:41:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545488543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054170512] [2021-12-14 12:41:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:11,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:11,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:11,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 12:41:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 12:41:11,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 811 proven. 201 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-14 12:41:14,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 12:41:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 811 proven. 201 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-14 12:41:19,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054170512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 12:41:19,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 12:41:19,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-14 12:41:19,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182015025] [2021-12-14 12:41:19,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 12:41:19,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 12:41:19,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 12:41:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-14 12:41:19,820 INFO L87 Difference]: Start difference. First operand 18123 states and 18649 transitions. Second operand has 9 states, 9 states have (on average 206.22222222222223) internal successors, (1856), 9 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:22,925 INFO L93 Difference]: Finished difference Result 43203 states and 44484 transitions. [2021-12-14 12:41:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 12:41:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 206.22222222222223) internal successors, (1856), 9 states have internal predecessors, (1856), 0 states have call successors, (0), 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 925 [2021-12-14 12:41:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:22,947 INFO L225 Difference]: With dead ends: 43203 [2021-12-14 12:41:22,948 INFO L226 Difference]: Without dead ends: 25716 [2021-12-14 12:41:22,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1865 GetRequests, 1852 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 12:41:22,956 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2686 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 4135 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2686 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 4135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:22,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2686 Valid, 59 Invalid, 4658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 4135 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 12:41:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25716 states. [2021-12-14 12:41:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25716 to 18452. [2021-12-14 12:41:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18452 states, 18451 states have (on average 1.0274781854642026) internal successors, (18958), 18451 states have internal predecessors, (18958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18452 states to 18452 states and 18958 transitions. [2021-12-14 12:41:23,128 INFO L78 Accepts]: Start accepts. Automaton has 18452 states and 18958 transitions. Word has length 925 [2021-12-14 12:41:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:23,128 INFO L470 AbstractCegarLoop]: Abstraction has 18452 states and 18958 transitions. [2021-12-14 12:41:23,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 206.22222222222223) internal successors, (1856), 9 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 18452 states and 18958 transitions. [2021-12-14 12:41:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2021-12-14 12:41:23,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:23,142 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 12:41:23,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:23,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 12:41:23,351 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1543050194, now seen corresponding path program 1 times [2021-12-14 12:41:23,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737354308] [2021-12-14 12:41:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:23,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 1097 proven. 156 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-12-14 12:41:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737354308] [2021-12-14 12:41:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737354308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544204550] [2021-12-14 12:41:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:23,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:23,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:23,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 12:41:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:41:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 1309 proven. 0 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-12-14 12:41:24,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:24,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544204550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:24,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:24,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-14 12:41:24,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021556932] [2021-12-14 12:41:24,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:24,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:24,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:24,959 INFO L87 Difference]: Start difference. First operand 18452 states and 18958 transitions. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:25,705 INFO L93 Difference]: Finished difference Result 35915 states and 36919 transitions. [2021-12-14 12:41:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 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 1021 [2021-12-14 12:41:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:25,723 INFO L225 Difference]: With dead ends: 35915 [2021-12-14 12:41:25,723 INFO L226 Difference]: Without dead ends: 17465 [2021-12-14 12:41:25,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:25,733 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 61 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:25,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 424 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17465 states. [2021-12-14 12:41:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17465 to 16478. [2021-12-14 12:41:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16478 states, 16477 states have (on average 1.0199672270437579) internal successors, (16806), 16477 states have internal predecessors, (16806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16478 states to 16478 states and 16806 transitions. [2021-12-14 12:41:25,880 INFO L78 Accepts]: Start accepts. Automaton has 16478 states and 16806 transitions. Word has length 1021 [2021-12-14 12:41:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:25,881 INFO L470 AbstractCegarLoop]: Abstraction has 16478 states and 16806 transitions. [2021-12-14 12:41:25,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 16478 states and 16806 transitions. [2021-12-14 12:41:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1400 [2021-12-14 12:41:25,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:25,905 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:25,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:26,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 12:41:26,114 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:26,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1023747313, now seen corresponding path program 1 times [2021-12-14 12:41:26,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:26,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000341333] [2021-12-14 12:41:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:26,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 1644 proven. 156 refuted. 0 times theorem prover too weak. 1727 trivial. 0 not checked. [2021-12-14 12:41:26,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000341333] [2021-12-14 12:41:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000341333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162809902] [2021-12-14 12:41:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:26,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:26,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:26,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 12:41:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:41:26,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 3336 trivial. 0 not checked. [2021-12-14 12:41:28,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162809902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:28,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:28,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-14 12:41:28,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823472284] [2021-12-14 12:41:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:28,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:28,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:28,203 INFO L87 Difference]: Start difference. First operand 16478 states and 16806 transitions. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:28,952 INFO L93 Difference]: Finished difference Result 32296 states and 32948 transitions. [2021-12-14 12:41:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 1399 [2021-12-14 12:41:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:28,969 INFO L225 Difference]: With dead ends: 32296 [2021-12-14 12:41:28,969 INFO L226 Difference]: Without dead ends: 16478 [2021-12-14 12:41:28,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1398 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:28,975 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 344 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:28,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 31 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16478 states. [2021-12-14 12:41:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16478 to 15491. [2021-12-14 12:41:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15491 states, 15490 states have (on average 1.0182052937378954) internal successors, (15772), 15490 states have internal predecessors, (15772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15491 states to 15491 states and 15772 transitions. [2021-12-14 12:41:29,110 INFO L78 Accepts]: Start accepts. Automaton has 15491 states and 15772 transitions. Word has length 1399 [2021-12-14 12:41:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:29,110 INFO L470 AbstractCegarLoop]: Abstraction has 15491 states and 15772 transitions. [2021-12-14 12:41:29,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 15491 states and 15772 transitions. [2021-12-14 12:41:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2021-12-14 12:41:29,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:29,134 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 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, 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, 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] [2021-12-14 12:41:29,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 12:41:29,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:29,335 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash -479866144, now seen corresponding path program 1 times [2021-12-14 12:41:29,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:29,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806918269] [2021-12-14 12:41:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:29,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 2122 proven. 156 refuted. 0 times theorem prover too weak. 3161 trivial. 0 not checked. [2021-12-14 12:41:29,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806918269] [2021-12-14 12:41:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806918269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:29,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401056819] [2021-12-14 12:41:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:29,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:29,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 12:41:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 12:41:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates...