./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem18_label21.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 8333703a084905077dfdc91626516e96efc672999752866d79c2cdfd4b587e43 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:04:53,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:04:53,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:04:53,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:04:53,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:04:53,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:04:53,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:04:53,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:04:53,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:04:53,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:04:53,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:04:53,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:04:53,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:04:53,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:04:53,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:04:53,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:04:53,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:04:53,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:04:53,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:04:53,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:04:53,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:04:53,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:04:53,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:04:53,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:04:53,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:04:53,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:04:53,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:04:53,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:04:53,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:04:53,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:04:53,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:04:53,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:04:53,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:04:53,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:04:53,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:04:53,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:04:53,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:04:53,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:04:53,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:04:53,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:04:53,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:04:53,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:04:53,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:04:53,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:04:53,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:04:53,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:04:53,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:04:53,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:04:53,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:04:53,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:04:53,373 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:04:53,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:04:53,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:04:53,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:04:53,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:04:53,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:04:53,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:04:53,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:04:53,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:04:53,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:04:53,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:04:53,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:04:53,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:04:53,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:04:53,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:04:53,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:04:53,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:04:53,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:04:53,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:04:53,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:04:53,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:04:53,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:04:53,378 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:04:53,378 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:04:53,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:04:53,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:04:53,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333703a084905077dfdc91626516e96efc672999752866d79c2cdfd4b587e43 [2021-12-15 23:04:53,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:04:53,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:04:53,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:04:53,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:04:53,639 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:04:53,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label21.c [2021-12-15 23:04:53,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669488cbf/af1892bd4efa44428df3c9cea2dfacf2/FLAGfde380b6f [2021-12-15 23:04:54,299 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:04:54,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label21.c [2021-12-15 23:04:54,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669488cbf/af1892bd4efa44428df3c9cea2dfacf2/FLAGfde380b6f [2021-12-15 23:04:54,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669488cbf/af1892bd4efa44428df3c9cea2dfacf2 [2021-12-15 23:04:54,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:04:54,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:04:54,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:04:54,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:04:54,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:04:54,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:04:54" (1/1) ... [2021-12-15 23:04:54,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcda9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:54, skipping insertion in model container [2021-12-15 23:04:54,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:04:54" (1/1) ... [2021-12-15 23:04:54,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:04:54,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:04:54,858 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/Problem18_label21.c[6051,6064] [2021-12-15 23:04:55,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:04:55,414 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:04:55,441 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/Problem18_label21.c[6051,6064] [2021-12-15 23:04:55,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:04:55,865 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:04:55,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55 WrapperNode [2021-12-15 23:04:55,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:04:55,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:04:55,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:04:55,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:04:55,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:55,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,098 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-15 23:04:56,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:04:56,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:04:56,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:04:56,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:04:56,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:04:56,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:04:56,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:04:56,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:04:56,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (1/1) ... [2021-12-15 23:04:56,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:04:56,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:04:56,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:04:56,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:04:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:04:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:04:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:04:56,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:04:56,454 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:04:56,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:04:58,796 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:04:58,814 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:04:58,815 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:04:58,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:04:58 BoogieIcfgContainer [2021-12-15 23:04:58,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:04:58,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:04:58,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:04:58,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:04:58,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:04:54" (1/3) ... [2021-12-15 23:04:58,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2387428e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:04:58, skipping insertion in model container [2021-12-15 23:04:58,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:55" (2/3) ... [2021-12-15 23:04:58,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2387428e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:04:58, skipping insertion in model container [2021-12-15 23:04:58,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:04:58" (3/3) ... [2021-12-15 23:04:58,826 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label21.c [2021-12-15 23:04:58,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:04:58,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:04:58,886 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:04:58,895 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:04:58,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:04:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 23:04:58,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:04:58,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:04:58,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:04:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:04:58,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2021-12-15 23:04:58,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:04:58,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437523325] [2021-12-15 23:04:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:04:58,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:04:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:04:59,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437523325] [2021-12-15 23:04:59,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437523325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:59,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:59,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:04:59,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652400693] [2021-12-15 23:04:59,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:59,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:59,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:59,217 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:02,226 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-12-15 23:05:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-15 23:05:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:02,246 INFO L225 Difference]: With dead ends: 2205 [2021-12-15 23:05:02,247 INFO L226 Difference]: Without dead ends: 1384 [2021-12-15 23:05:02,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:02,255 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 690 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:02,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 291 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 23:05:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-12-15 23:05:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-12-15 23:05:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.7339117859725235) internal successors, (2398), 1383 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2398 transitions. [2021-12-15 23:05:02,370 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2398 transitions. Word has length 58 [2021-12-15 23:05:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:02,371 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2398 transitions. [2021-12-15 23:05:02,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2398 transitions. [2021-12-15 23:05:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 23:05:02,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:02,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:02,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:05:02,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 967998112, now seen corresponding path program 1 times [2021-12-15 23:05:02,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:02,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749223987] [2021-12-15 23:05:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:02,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:05:02,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749223987] [2021-12-15 23:05:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749223987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:02,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:02,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:02,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643269023] [2021-12-15 23:05:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:02,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:05:02,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:05:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:05:02,579 INFO L87 Difference]: Start difference. First operand 1384 states and 2398 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:06,574 INFO L93 Difference]: Finished difference Result 4842 states and 8275 transitions. [2021-12-15 23:05:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:05:06,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-15 23:05:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:06,589 INFO L225 Difference]: With dead ends: 4842 [2021-12-15 23:05:06,589 INFO L226 Difference]: Without dead ends: 3460 [2021-12-15 23:05:06,596 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 [2021-12-15 23:05:06,598 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 2033 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:06,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2033 Valid, 137 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 23:05:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-12-15 23:05:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3454. [2021-12-15 23:05:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.540689255719664) internal successors, (5320), 3453 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5320 transitions. [2021-12-15 23:05:06,671 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5320 transitions. Word has length 127 [2021-12-15 23:05:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:06,673 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5320 transitions. [2021-12-15 23:05:06,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5320 transitions. [2021-12-15 23:05:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-15 23:05:06,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:06,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:06,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:05:06,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1427820626, now seen corresponding path program 1 times [2021-12-15 23:05:06,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:06,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321934837] [2021-12-15 23:05:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:06,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 23:05:06,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:06,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321934837] [2021-12-15 23:05:06,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321934837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:06,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:06,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:06,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583360454] [2021-12-15 23:05:06,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:06,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:05:06,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:05:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:05:06,873 INFO L87 Difference]: Start difference. First operand 3454 states and 5320 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:10,362 INFO L93 Difference]: Finished difference Result 8976 states and 13752 transitions. [2021-12-15 23:05:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:05:10,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 236 [2021-12-15 23:05:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:10,384 INFO L225 Difference]: With dead ends: 8976 [2021-12-15 23:05:10,384 INFO L226 Difference]: Without dead ends: 5524 [2021-12-15 23:05:10,388 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 [2021-12-15 23:05:10,389 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1922 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4114 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 4114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:10,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 647 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 4114 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-15 23:05:10,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-12-15 23:05:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 5524. [2021-12-15 23:05:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.3489045808437443) internal successors, (7450), 5523 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 7450 transitions. [2021-12-15 23:05:10,487 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 7450 transitions. Word has length 236 [2021-12-15 23:05:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:10,488 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 7450 transitions. [2021-12-15 23:05:10,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 7450 transitions. [2021-12-15 23:05:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-15 23:05:10,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:10,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:10,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:05:10,494 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 763326481, now seen corresponding path program 1 times [2021-12-15 23:05:10,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:10,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608674085] [2021-12-15 23:05:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:10,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 23:05:10,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:10,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608674085] [2021-12-15 23:05:10,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608674085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:10,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:10,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:10,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905042603] [2021-12-15 23:05:10,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:10,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:05:10,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:05:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:05:10,676 INFO L87 Difference]: Start difference. First operand 5524 states and 7450 transitions. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:13,268 INFO L93 Difference]: Finished difference Result 12479 states and 17177 transitions. [2021-12-15 23:05:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:05:13,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-12-15 23:05:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:13,301 INFO L225 Difference]: With dead ends: 12479 [2021-12-15 23:05:13,301 INFO L226 Difference]: Without dead ends: 7594 [2021-12-15 23:05:13,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:05:13,347 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 515 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:13,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 637 Invalid, 3725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 23:05:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-12-15 23:05:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2021-12-15 23:05:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.2029552368535419) internal successors, (8304), 6903 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8304 transitions. [2021-12-15 23:05:13,470 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8304 transitions. Word has length 325 [2021-12-15 23:05:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:13,472 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 8304 transitions. [2021-12-15 23:05:13,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8304 transitions. [2021-12-15 23:05:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-12-15 23:05:13,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:13,495 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:13,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:05:13,495 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash -497588096, now seen corresponding path program 1 times [2021-12-15 23:05:13,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204625537] [2021-12-15 23:05:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:13,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-12-15 23:05:14,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:14,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204625537] [2021-12-15 23:05:14,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204625537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:14,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:14,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:05:14,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055816530] [2021-12-15 23:05:14,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:14,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:14,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:14,040 INFO L87 Difference]: Start difference. First operand 6904 states and 8304 transitions. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 2 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:15,783 INFO L93 Difference]: Finished difference Result 15186 states and 18598 transitions. [2021-12-15 23:05:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 2 states have internal predecessors, (576), 0 states have call successors, (0), 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 957 [2021-12-15 23:05:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:15,810 INFO L225 Difference]: With dead ends: 15186 [2021-12-15 23:05:15,810 INFO L226 Difference]: Without dead ends: 8974 [2021-12-15 23:05:15,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:15,817 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 192 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:15,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 344 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:05:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-12-15 23:05:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8974. [2021-12-15 23:05:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1776440432408337) internal successors, (10567), 8973 states have internal predecessors, (10567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10567 transitions. [2021-12-15 23:05:15,961 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10567 transitions. Word has length 957 [2021-12-15 23:05:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:15,965 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 10567 transitions. [2021-12-15 23:05:15,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 2 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10567 transitions. [2021-12-15 23:05:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1019 [2021-12-15 23:05:16,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:16,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:05:16,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:05:16,007 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash -54108493, now seen corresponding path program 1 times [2021-12-15 23:05:16,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585431783] [2021-12-15 23:05:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:16,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 459 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-15 23:05:16,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585431783] [2021-12-15 23:05:16,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585431783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:16,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:16,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:16,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565388544] [2021-12-15 23:05:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:16,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:16,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:16,419 INFO L87 Difference]: Start difference. First operand 8974 states and 10567 transitions. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:18,432 INFO L93 Difference]: Finished difference Result 21396 states and 25576 transitions. [2021-12-15 23:05:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 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 1018 [2021-12-15 23:05:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:18,472 INFO L225 Difference]: With dead ends: 21396 [2021-12-15 23:05:18,473 INFO L226 Difference]: Without dead ends: 13114 [2021-12-15 23:05:18,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:18,486 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 545 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:18,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1107 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:05:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2021-12-15 23:05:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13114. [2021-12-15 23:05:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13114 states, 13113 states have (on average 1.1534355220010677) internal successors, (15125), 13113 states have internal predecessors, (15125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 15125 transitions. [2021-12-15 23:05:18,677 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 15125 transitions. Word has length 1018 [2021-12-15 23:05:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:18,678 INFO L470 AbstractCegarLoop]: Abstraction has 13114 states and 15125 transitions. [2021-12-15 23:05:18,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 15125 transitions. [2021-12-15 23:05:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2021-12-15 23:05:18,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:18,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:05:18,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:05:18,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2032198812, now seen corresponding path program 1 times [2021-12-15 23:05:18,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299683570] [2021-12-15 23:05:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:18,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-12-15 23:05:19,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299683570] [2021-12-15 23:05:19,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299683570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:19,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:19,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:05:19,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047590888] [2021-12-15 23:05:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:19,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:19,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:19,089 INFO L87 Difference]: Start difference. First operand 13114 states and 15125 transitions. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 2 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:20,976 INFO L93 Difference]: Finished difference Result 31056 states and 36990 transitions. [2021-12-15 23:05:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:20,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 2 states have internal predecessors, (576), 0 states have call successors, (0), 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 1025 [2021-12-15 23:05:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:21,022 INFO L225 Difference]: With dead ends: 31056 [2021-12-15 23:05:21,023 INFO L226 Difference]: Without dead ends: 19324 [2021-12-15 23:05:21,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:21,040 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:21,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 389 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:05:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19324 states. [2021-12-15 23:05:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19324 to 18634. [2021-12-15 23:05:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 18633 states have (on average 1.1259056512638868) internal successors, (20979), 18633 states have internal predecessors, (20979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 20979 transitions. [2021-12-15 23:05:21,308 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 20979 transitions. Word has length 1025 [2021-12-15 23:05:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:21,311 INFO L470 AbstractCegarLoop]: Abstraction has 18634 states and 20979 transitions. [2021-12-15 23:05:21,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 2 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 20979 transitions. [2021-12-15 23:05:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2021-12-15 23:05:21,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:21,323 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:21,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:05:21,324 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1144181033, now seen corresponding path program 1 times [2021-12-15 23:05:21,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720959624] [2021-12-15 23:05:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:21,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-12-15 23:05:21,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:21,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720959624] [2021-12-15 23:05:21,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720959624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:21,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:21,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:21,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662551526] [2021-12-15 23:05:21,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:21,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:21,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:21,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:21,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:21,763 INFO L87 Difference]: Start difference. First operand 18634 states and 20979 transitions. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:23,683 INFO L93 Difference]: Finished difference Result 40026 states and 45841 transitions. [2021-12-15 23:05:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 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 1043 [2021-12-15 23:05:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:23,729 INFO L225 Difference]: With dead ends: 40026 [2021-12-15 23:05:23,729 INFO L226 Difference]: Without dead ends: 22774 [2021-12-15 23:05:23,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:23,748 INFO L933 BasicCegarLoop]: 1075 mSDtfsCounter, 642 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:23,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1082 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:05:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2021-12-15 23:05:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22084. [2021-12-15 23:05:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22084 states, 22083 states have (on average 1.127609473350541) internal successors, (24901), 22083 states have internal predecessors, (24901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 24901 transitions. [2021-12-15 23:05:24,017 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 24901 transitions. Word has length 1043 [2021-12-15 23:05:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:24,018 INFO L470 AbstractCegarLoop]: Abstraction has 22084 states and 24901 transitions. [2021-12-15 23:05:24,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 24901 transitions. [2021-12-15 23:05:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2021-12-15 23:05:24,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:24,035 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:24,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:05:24,035 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:24,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2086503451, now seen corresponding path program 1 times [2021-12-15 23:05:24,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:24,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255246855] [2021-12-15 23:05:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:24,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 643 proven. 0 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-12-15 23:05:24,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:24,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255246855] [2021-12-15 23:05:24,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255246855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:24,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:24,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:24,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085195999] [2021-12-15 23:05:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:24,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:24,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:24,451 INFO L87 Difference]: Start difference. First operand 22084 states and 24901 transitions. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:26,410 INFO L93 Difference]: Finished difference Result 53138 states and 60865 transitions. [2021-12-15 23:05:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:26,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 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 1131 [2021-12-15 23:05:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:26,459 INFO L225 Difference]: With dead ends: 53138 [2021-12-15 23:05:26,459 INFO L226 Difference]: Without dead ends: 32436 [2021-12-15 23:05:26,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:26,482 INFO L933 BasicCegarLoop]: 1061 mSDtfsCounter, 669 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:26,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1068 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:05:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32436 states. [2021-12-15 23:05:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32436 to 30364. [2021-12-15 23:05:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30364 states, 30363 states have (on average 1.1217271020650132) internal successors, (34059), 30363 states have internal predecessors, (34059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 34059 transitions. [2021-12-15 23:05:26,926 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 34059 transitions. Word has length 1131 [2021-12-15 23:05:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:26,927 INFO L470 AbstractCegarLoop]: Abstraction has 30364 states and 34059 transitions. [2021-12-15 23:05:26,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 34059 transitions. [2021-12-15 23:05:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1148 [2021-12-15 23:05:26,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:26,947 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:26,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:05:26,947 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1252432964, now seen corresponding path program 1 times [2021-12-15 23:05:26,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993255374] [2021-12-15 23:05:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:26,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 900 proven. 280 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-12-15 23:05:27,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:27,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993255374] [2021-12-15 23:05:27,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993255374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:05:27,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417570086] [2021-12-15 23:05:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:27,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:05:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:05:27,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:05:27,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:05:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:27,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:05:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:05:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 633 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-12-15 23:05:29,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:05:29,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417570086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:29,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:05:29,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 23:05:29,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296242811] [2021-12-15 23:05:29,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:29,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:29,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:05:29,534 INFO L87 Difference]: Start difference. First operand 30364 states and 34059 transitions. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:31,423 INFO L93 Difference]: Finished difference Result 68316 states and 76932 transitions. [2021-12-15 23:05:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 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 1147 [2021-12-15 23:05:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:31,464 INFO L225 Difference]: With dead ends: 68316 [2021-12-15 23:05:31,465 INFO L226 Difference]: Without dead ends: 33814 [2021-12-15 23:05:31,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 1146 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:05:31,491 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 649 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:31,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 973 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:05:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33814 states. [2021-12-15 23:05:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33814 to 31054. [2021-12-15 23:05:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31054 states, 31053 states have (on average 1.0551315492867033) internal successors, (32765), 31053 states have internal predecessors, (32765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31054 states to 31054 states and 32765 transitions. [2021-12-15 23:05:31,806 INFO L78 Accepts]: Start accepts. Automaton has 31054 states and 32765 transitions. Word has length 1147 [2021-12-15 23:05:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:31,807 INFO L470 AbstractCegarLoop]: Abstraction has 31054 states and 32765 transitions. [2021-12-15 23:05:31,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 31054 states and 32765 transitions. [2021-12-15 23:05:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1169 [2021-12-15 23:05:31,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:31,875 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:31,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:05:32,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 23:05:32,092 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash 299588984, now seen corresponding path program 1 times [2021-12-15 23:05:32,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:32,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98315067] [2021-12-15 23:05:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:32,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 637 proven. 43 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2021-12-15 23:05:32,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98315067] [2021-12-15 23:05:32,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98315067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:05:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802643509] [2021-12-15 23:05:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:32,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:05:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:05:32,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:05:32,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:05:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:05:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:05:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-12-15 23:05:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:05:34,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802643509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:34,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:05:34,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 23:05:34,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301310750] [2021-12-15 23:05:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:34,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:34,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:05:34,089 INFO L87 Difference]: Start difference. First operand 31054 states and 32765 transitions. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:35,762 INFO L93 Difference]: Finished difference Result 73146 states and 77883 transitions. [2021-12-15 23:05:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 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 1168 [2021-12-15 23:05:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:35,811 INFO L225 Difference]: With dead ends: 73146 [2021-12-15 23:05:35,811 INFO L226 Difference]: Without dead ends: 42784 [2021-12-15 23:05:35,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:05:35,835 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 643 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:35,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 983 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:05:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-12-15 23:05:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 41404. [2021-12-15 23:05:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.053063787648238) internal successors, (43600), 41403 states have internal predecessors, (43600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 43600 transitions. [2021-12-15 23:05:36,218 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 43600 transitions. Word has length 1168 [2021-12-15 23:05:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:36,219 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 43600 transitions. [2021-12-15 23:05:36,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 43600 transitions. [2021-12-15 23:05:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1206 [2021-12-15 23:05:36,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:36,236 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:36,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:05:36,444 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,SelfDestructingSolverStorable10 [2021-12-15 23:05:36,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1279866632, now seen corresponding path program 1 times [2021-12-15 23:05:36,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:36,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916442480] [2021-12-15 23:05:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:36,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 910 proven. 330 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-15 23:05:37,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916442480] [2021-12-15 23:05:37,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916442480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:05:37,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605907725] [2021-12-15 23:05:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:37,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:05:37,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:05:37,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:05:37,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:05:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:05:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:05:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 756 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-12-15 23:05:38,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:05:38,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605907725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:38,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:05:38,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 23:05:38,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979219298] [2021-12-15 23:05:38,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:38,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:38,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:38,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:38,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:05:38,732 INFO L87 Difference]: Start difference. First operand 41404 states and 43600 transitions. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:40,338 INFO L93 Difference]: Finished difference Result 82116 states and 86507 transitions. [2021-12-15 23:05:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:40,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 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 1205 [2021-12-15 23:05:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:40,372 INFO L225 Difference]: With dead ends: 82116 [2021-12-15 23:05:40,372 INFO L226 Difference]: Without dead ends: 41404 [2021-12-15 23:05:40,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 1204 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:05:40,387 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 541 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:40,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 115 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:05:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-12-15 23:05:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2021-12-15 23:05:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0395381977151414) internal successors, (43040), 41403 states have internal predecessors, (43040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 43040 transitions. [2021-12-15 23:05:40,736 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 43040 transitions. Word has length 1205 [2021-12-15 23:05:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:40,736 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 43040 transitions. [2021-12-15 23:05:40,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 43040 transitions. [2021-12-15 23:05:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1303 [2021-12-15 23:05:40,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:40,752 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, 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, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:40,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:05:40,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:05:40,966 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash -590814582, now seen corresponding path program 1 times [2021-12-15 23:05:40,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978344443] [2021-12-15 23:05:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:40,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2021-12-15 23:05:41,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978344443] [2021-12-15 23:05:41,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978344443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:41,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:41,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:41,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443340750] [2021-12-15 23:05:41,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:41,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:41,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:41,431 INFO L87 Difference]: Start difference. First operand 41404 states and 43040 transitions. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:43,049 INFO L93 Difference]: Finished difference Result 82116 states and 85387 transitions. [2021-12-15 23:05:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 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 1302 [2021-12-15 23:05:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:43,091 INFO L225 Difference]: With dead ends: 82116 [2021-12-15 23:05:43,091 INFO L226 Difference]: Without dead ends: 41404 [2021-12-15 23:05:43,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:43,116 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 739 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:43,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 746 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:05:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-12-15 23:05:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2021-12-15 23:05:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0355529792527112) internal successors, (42875), 41403 states have internal predecessors, (42875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 42875 transitions. [2021-12-15 23:05:43,477 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 42875 transitions. Word has length 1302 [2021-12-15 23:05:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:43,477 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 42875 transitions. [2021-12-15 23:05:43,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 42875 transitions. [2021-12-15 23:05:43,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1322 [2021-12-15 23:05:43,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:43,559 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:43,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 23:05:43,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1629244018, now seen corresponding path program 1 times [2021-12-15 23:05:43,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:43,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108452683] [2021-12-15 23:05:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:43,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 1265 proven. 0 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-12-15 23:05:43,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108452683] [2021-12-15 23:05:43,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108452683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:43,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:43,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:43,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013228204] [2021-12-15 23:05:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:43,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:43,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:43,926 INFO L87 Difference]: Start difference. First operand 41404 states and 42875 transitions. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:05:45,485 INFO L93 Difference]: Finished difference Result 81426 states and 84344 transitions. [2021-12-15 23:05:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:05:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 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 1321 [2021-12-15 23:05:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:05:45,526 INFO L225 Difference]: With dead ends: 81426 [2021-12-15 23:05:45,526 INFO L226 Difference]: Without dead ends: 40714 [2021-12-15 23:05:45,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:45,550 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 504 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:05:45,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 932 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:05:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40714 states. [2021-12-15 23:05:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40714 to 40024. [2021-12-15 23:05:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40024 states, 40023 states have (on average 1.0305574294780502) internal successors, (41246), 40023 states have internal predecessors, (41246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41246 transitions. [2021-12-15 23:05:46,031 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41246 transitions. Word has length 1321 [2021-12-15 23:05:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:05:46,031 INFO L470 AbstractCegarLoop]: Abstraction has 40024 states and 41246 transitions. [2021-12-15 23:05:46,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:05:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41246 transitions. [2021-12-15 23:05:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1404 [2021-12-15 23:05:46,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:05:46,057 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, 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, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:05:46,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:05:46,057 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:05:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:05:46,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1901198672, now seen corresponding path program 1 times [2021-12-15 23:05:46,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:05:46,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981005070] [2021-12-15 23:05:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:05:46,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:05:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:05:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 1516 proven. 0 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2021-12-15 23:05:46,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:05:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981005070] [2021-12-15 23:05:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981005070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:05:46,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:05:46,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:05:46,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42356885] [2021-12-15 23:05:46,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:05:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:05:46,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:05:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:05:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:05:46,427 INFO L87 Difference]: Start difference. First operand 40024 states and 41246 transitions. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)