./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.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 6d20f8abdac11d3a14265079d0abbd72a3c88bf6607f5bf46f98ccd96bfda721 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:59:39,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:59:39,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:59:39,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:59:39,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:59:39,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:59:39,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:59:39,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:59:39,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:59:39,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:59:39,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:59:39,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:59:39,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:59:39,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:59:39,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:59:39,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:59:39,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:59:39,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:59:39,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:59:39,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:59:39,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:59:39,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:59:39,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:59:39,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:59:39,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:59:39,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:59:39,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:59:39,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:59:39,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:59:39,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:59:39,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:59:39,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:59:39,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:59:39,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:59:39,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:59:39,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:59:39,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:59:39,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:59:39,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:59:39,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:59:39,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:59:39,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:59:39,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:59:39,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:59:39,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:59:39,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:59:39,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:59:39,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:59:39,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:59:39,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:59:39,359 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:59:39,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:59:39,359 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:59:39,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:59:39,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:59:39,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:59:39,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:59:39,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:59:39,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:59:39,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:59:39,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:59:39,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:59:39,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:59:39,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:59:39,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d20f8abdac11d3a14265079d0abbd72a3c88bf6607f5bf46f98ccd96bfda721 [2021-12-15 11:59:39,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:59:39,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:59:39,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:59:39,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:59:39,583 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:59:39,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2021-12-15 11:59:39,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6392e28dc/843a6ec41125455d9650eaca03c1e984/FLAG188c4ca20 [2021-12-15 11:59:40,251 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:59:40,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2021-12-15 11:59:40,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6392e28dc/843a6ec41125455d9650eaca03c1e984/FLAG188c4ca20 [2021-12-15 11:59:40,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6392e28dc/843a6ec41125455d9650eaca03c1e984 [2021-12-15 11:59:40,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:59:40,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:59:40,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:59:40,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:59:40,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:59:40,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:59:40" (1/1) ... [2021-12-15 11:59:40,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a8da00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:40, skipping insertion in model container [2021-12-15 11:59:40,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:59:40" (1/1) ... [2021-12-15 11:59:40,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:59:40,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:59:40,988 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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c[6354,6367] [2021-12-15 11:59:41,009 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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c[8229,8242] [2021-12-15 11:59:41,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:59:41,605 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:59:41,637 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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c[6354,6367] [2021-12-15 11:59:41,641 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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c[8229,8242] [2021-12-15 11:59:41,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:59:41,936 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:59:41,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41 WrapperNode [2021-12-15 11:59:41,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:59:41,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:59:41,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:59:41,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:59:41,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:41,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,229 INFO L137 Inliner]: procedures = 33, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4976 [2021-12-15 11:59:42,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:59:42,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:59:42,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:59:42,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:59:42,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:59:42,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:59:42,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:59:42,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:59:42,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (1/1) ... [2021-12-15 11:59:42,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:59:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:59:42,569 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 11:59:42,589 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 11:59:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:59:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:59:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:59:42,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:59:42,673 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:59:42,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:59:45,603 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:59:45,618 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:59:45,619 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 11:59:45,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:59:45 BoogieIcfgContainer [2021-12-15 11:59:45,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:59:45,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:59:45,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:59:45,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:59:45,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:59:40" (1/3) ... [2021-12-15 11:59:45,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc9562a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:59:45, skipping insertion in model container [2021-12-15 11:59:45,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:41" (2/3) ... [2021-12-15 11:59:45,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc9562a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:59:45, skipping insertion in model container [2021-12-15 11:59:45,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:59:45" (3/3) ... [2021-12-15 11:59:45,629 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2021-12-15 11:59:45,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:59:45,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 11:59:45,682 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:59:45,688 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 11:59:45,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 11:59:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states 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 11:59:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 11:59:45,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:45,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:59:45,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1520027445, now seen corresponding path program 1 times [2021-12-15 11:59:45,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:45,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837687165] [2021-12-15 11:59:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:45,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:45,848 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 11:59:45,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:45,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837687165] [2021-12-15 11:59:45,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837687165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:45,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:59:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544476585] [2021-12-15 11:59:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:45,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:45,873 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 11:59:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:48,751 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2021-12-15 11:59:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-15 11:59:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:48,770 INFO L225 Difference]: With dead ends: 2489 [2021-12-15 11:59:48,771 INFO L226 Difference]: Without dead ends: 1563 [2021-12-15 11:59:48,776 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 11:59:48,779 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 979 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:48,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 255 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 11:59:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-12-15 11:59:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2021-12-15 11:59:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.8398462524023063) internal successors, (2872), 1562 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states 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 11:59:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2872 transitions. [2021-12-15 11:59:48,859 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2872 transitions. Word has length 16 [2021-12-15 11:59:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:48,860 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2872 transitions. [2021-12-15 11:59:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 11:59:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2872 transitions. [2021-12-15 11:59:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 11:59:48,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:48,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:59:48,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:59:48,861 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:48,862 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-12-15 11:59:48,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:48,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054864961] [2021-12-15 11:59:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:48,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:48,906 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 11:59:48,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:48,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054864961] [2021-12-15 11:59:48,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054864961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:48,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:48,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562144685] [2021-12-15 11:59:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:48,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:48,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:48,910 INFO L87 Difference]: Start difference. First operand 1563 states and 2872 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:59:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:48,960 INFO L93 Difference]: Finished difference Result 1639 states and 2988 transitions. [2021-12-15 11:59:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:59:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-15 11:59:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:48,965 INFO L225 Difference]: With dead ends: 1639 [2021-12-15 11:59:48,966 INFO L226 Difference]: Without dead ends: 1599 [2021-12-15 11:59:48,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:59:48,968 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:48,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-15 11:59:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2021-12-15 11:59:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.8295964125560538) internal successors, (2856), 1562 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states 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 11:59:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2856 transitions. [2021-12-15 11:59:48,997 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2856 transitions. Word has length 26 [2021-12-15 11:59:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:48,997 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2856 transitions. [2021-12-15 11:59:48,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:59:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2856 transitions. [2021-12-15 11:59:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 11:59:48,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:48,999 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] [2021-12-15 11:59:48,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:59:49,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-12-15 11:59:49,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198441571] [2021-12-15 11:59:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,042 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 11:59:49,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198441571] [2021-12-15 11:59:49,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198441571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:59:49,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19327188] [2021-12-15 11:59:49,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:49,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:49,045 INFO L87 Difference]: Start difference. First operand 1563 states and 2856 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 11:59:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,069 INFO L93 Difference]: Finished difference Result 1629 states and 2958 transitions. [2021-12-15 11:59:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:49,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-15 11:59:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,075 INFO L225 Difference]: With dead ends: 1629 [2021-12-15 11:59:49,075 INFO L226 Difference]: Without dead ends: 1593 [2021-12-15 11:59:49,076 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 11:59:49,077 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-15 11:59:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2021-12-15 11:59:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1589 states have (on average 1.8250471994965387) internal successors, (2900), 1590 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states 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 11:59:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2900 transitions. [2021-12-15 11:59:49,107 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2900 transitions. Word has length 41 [2021-12-15 11:59:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:49,108 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 2900 transitions. [2021-12-15 11:59:49,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 11:59:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2900 transitions. [2021-12-15 11:59:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 11:59:49,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:49,109 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] [2021-12-15 11:59:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:59:49,110 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-12-15 11:59:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514881481] [2021-12-15 11:59:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,156 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 11:59:49,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514881481] [2021-12-15 11:59:49,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514881481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:49,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051533174] [2021-12-15 11:59:49,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:49,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:49,159 INFO L87 Difference]: Start difference. First operand 1591 states and 2900 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 11:59:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,233 INFO L93 Difference]: Finished difference Result 1975 states and 3500 transitions. [2021-12-15 11:59:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:59:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-15 11:59:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,239 INFO L225 Difference]: With dead ends: 1975 [2021-12-15 11:59:49,240 INFO L226 Difference]: Without dead ends: 1911 [2021-12-15 11:59:49,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:59:49,241 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-15 11:59:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2021-12-15 11:59:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1651 states have (on average 1.8140520896426409) internal successors, (2995), 1652 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states 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 11:59:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2995 transitions. [2021-12-15 11:59:49,273 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2995 transitions. Word has length 41 [2021-12-15 11:59:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:49,273 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2995 transitions. [2021-12-15 11:59:49,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 11:59:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2995 transitions. [2021-12-15 11:59:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:59:49,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:49,275 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] [2021-12-15 11:59:49,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:59:49,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-12-15 11:59:49,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441296875] [2021-12-15 11:59:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,306 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 11:59:49,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441296875] [2021-12-15 11:59:49,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441296875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:59:49,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636552379] [2021-12-15 11:59:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:49,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:49,309 INFO L87 Difference]: Start difference. First operand 1653 states and 2995 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,336 INFO L93 Difference]: Finished difference Result 1840 states and 3282 transitions. [2021-12-15 11:59:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:59:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,342 INFO L225 Difference]: With dead ends: 1840 [2021-12-15 11:59:49,342 INFO L226 Difference]: Without dead ends: 1714 [2021-12-15 11:59:49,343 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 11:59:49,344 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-15 11:59:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-15 11:59:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.802923976608187) internal successors, (3083), 1711 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states 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 11:59:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3083 transitions. [2021-12-15 11:59:49,375 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3083 transitions. Word has length 43 [2021-12-15 11:59:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:49,375 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 3083 transitions. [2021-12-15 11:59:49,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3083 transitions. [2021-12-15 11:59:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:59:49,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:49,377 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] [2021-12-15 11:59:49,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:59:49,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-12-15 11:59:49,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456361880] [2021-12-15 11:59:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,444 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 11:59:49,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456361880] [2021-12-15 11:59:49,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456361880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:49,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446223498] [2021-12-15 11:59:49,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:49,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:49,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:49,446 INFO L87 Difference]: Start difference. First operand 1712 states and 3083 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,530 INFO L93 Difference]: Finished difference Result 1897 states and 3365 transitions. [2021-12-15 11:59:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:59:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:59:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,537 INFO L225 Difference]: With dead ends: 1897 [2021-12-15 11:59:49,537 INFO L226 Difference]: Without dead ends: 1714 [2021-12-15 11:59:49,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:59:49,541 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 4476 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 1633 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-15 11:59:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-15 11:59:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.8011695906432748) internal successors, (3080), 1711 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states 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 11:59:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3080 transitions. [2021-12-15 11:59:49,575 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3080 transitions. Word has length 43 [2021-12-15 11:59:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:49,576 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 3080 transitions. [2021-12-15 11:59:49,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3080 transitions. [2021-12-15 11:59:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:59:49,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:49,578 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] [2021-12-15 11:59:49,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:59:49,578 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-12-15 11:59:49,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332664033] [2021-12-15 11:59:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,636 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 11:59:49,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332664033] [2021-12-15 11:59:49,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332664033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:59:49,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544747882] [2021-12-15 11:59:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:49,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:49,639 INFO L87 Difference]: Start difference. First operand 1712 states and 3080 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,669 INFO L93 Difference]: Finished difference Result 2042 states and 3576 transitions. [2021-12-15 11:59:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:59:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,676 INFO L225 Difference]: With dead ends: 2042 [2021-12-15 11:59:49,676 INFO L226 Difference]: Without dead ends: 1859 [2021-12-15 11:59:49,677 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 11:59:49,678 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-12-15 11:59:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2021-12-15 11:59:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1855 states have (on average 1.774123989218329) internal successors, (3291), 1856 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states 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 11:59:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 3291 transitions. [2021-12-15 11:59:49,718 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 3291 transitions. Word has length 43 [2021-12-15 11:59:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:49,720 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 3291 transitions. [2021-12-15 11:59:49,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 3291 transitions. [2021-12-15 11:59:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:59:49,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:49,722 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] [2021-12-15 11:59:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:59:49,722 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-12-15 11:59:49,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256783675] [2021-12-15 11:59:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,763 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 11:59:49,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256783675] [2021-12-15 11:59:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256783675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:59:49,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370669788] [2021-12-15 11:59:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:49,766 INFO L87 Difference]: Start difference. First operand 1857 states and 3291 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,798 INFO L93 Difference]: Finished difference Result 2441 states and 4149 transitions. [2021-12-15 11:59:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:59:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,806 INFO L225 Difference]: With dead ends: 2441 [2021-12-15 11:59:49,806 INFO L226 Difference]: Without dead ends: 2113 [2021-12-15 11:59:49,807 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 11:59:49,808 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-12-15 11:59:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2021-12-15 11:59:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2109 states have (on average 1.7292555713608344) internal successors, (3647), 2110 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states 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 11:59:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3647 transitions. [2021-12-15 11:59:49,853 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3647 transitions. Word has length 43 [2021-12-15 11:59:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:49,853 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 3647 transitions. [2021-12-15 11:59:49,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:59:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3647 transitions. [2021-12-15 11:59:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 11:59:49,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:49,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:59:49,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:59:49,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-12-15 11:59:49,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:49,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342627757] [2021-12-15 11:59:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:49,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:49,911 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 11:59:49,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:49,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342627757] [2021-12-15 11:59:49,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342627757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:49,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:49,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:49,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453085529] [2021-12-15 11:59:49,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:49,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:49,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:49,913 INFO L87 Difference]: Start difference. First operand 2111 states and 3647 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:59:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:49,979 INFO L93 Difference]: Finished difference Result 2634 states and 4375 transitions. [2021-12-15 11:59:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:59:49,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 11:59:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:49,987 INFO L225 Difference]: With dead ends: 2634 [2021-12-15 11:59:49,988 INFO L226 Difference]: Without dead ends: 2632 [2021-12-15 11:59:49,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:59:49,989 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:49,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-12-15 11:59:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2021-12-15 11:59:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2157 states have (on average 1.7111729253592953) internal successors, (3691), 2158 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states 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 11:59:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3691 transitions. [2021-12-15 11:59:50,041 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3691 transitions. Word has length 44 [2021-12-15 11:59:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:50,041 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 3691 transitions. [2021-12-15 11:59:50,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:59:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3691 transitions. [2021-12-15 11:59:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:59:50,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:50,042 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:59:50,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:59:50,043 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-12-15 11:59:50,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:50,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263126036] [2021-12-15 11:59:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:50,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:59:50,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263126036] [2021-12-15 11:59:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263126036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:50,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:50,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:50,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168536195] [2021-12-15 11:59:50,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:50,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:50,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:50,081 INFO L87 Difference]: Start difference. First operand 2159 states and 3691 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 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 11:59:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:50,180 INFO L93 Difference]: Finished difference Result 4187 states and 6539 transitions. [2021-12-15 11:59:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:59:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 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 64 [2021-12-15 11:59:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:50,192 INFO L225 Difference]: With dead ends: 4187 [2021-12-15 11:59:50,192 INFO L226 Difference]: Without dead ends: 3557 [2021-12-15 11:59:50,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:59:50,195 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:50,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-12-15 11:59:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2021-12-15 11:59:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2785 states have (on average 1.6398563734290843) internal successors, (4567), 2786 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states 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 11:59:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4567 transitions. [2021-12-15 11:59:50,267 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4567 transitions. Word has length 64 [2021-12-15 11:59:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:50,268 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4567 transitions. [2021-12-15 11:59:50,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 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 11:59:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4567 transitions. [2021-12-15 11:59:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:59:50,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:50,269 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:59:50,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:59:50,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-12-15 11:59:50,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:50,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905013318] [2021-12-15 11:59:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:50,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 11:59:50,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:50,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905013318] [2021-12-15 11:59:50,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905013318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:50,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:50,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:50,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676767555] [2021-12-15 11:59:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:50,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:50,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:50,305 INFO L87 Difference]: Start difference. First operand 2787 states and 4567 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 11:59:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:50,448 INFO L93 Difference]: Finished difference Result 4815 states and 7415 transitions. [2021-12-15 11:59:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:59:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 64 [2021-12-15 11:59:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:50,461 INFO L225 Difference]: With dead ends: 4815 [2021-12-15 11:59:50,462 INFO L226 Difference]: Without dead ends: 4185 [2021-12-15 11:59:50,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:59:50,464 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3065 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:50,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-12-15 11:59:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2021-12-15 11:59:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3729 states have (on average 1.5744167337087691) internal successors, (5871), 3730 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states 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 11:59:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5871 transitions. [2021-12-15 11:59:50,604 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5871 transitions. Word has length 64 [2021-12-15 11:59:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:50,604 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5871 transitions. [2021-12-15 11:59:50,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 11:59:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5871 transitions. [2021-12-15 11:59:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:59:50,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:50,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:59:50,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:59:50,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:50,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-12-15 11:59:50,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:50,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563339634] [2021-12-15 11:59:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:50,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:59:50,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:50,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563339634] [2021-12-15 11:59:50,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563339634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:50,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:50,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:59:50,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436497056] [2021-12-15 11:59:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:50,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:59:50,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:59:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:59:50,640 INFO L87 Difference]: Start difference. First operand 3731 states and 5871 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 11:59:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:50,768 INFO L93 Difference]: Finished difference Result 5083 states and 7795 transitions. [2021-12-15 11:59:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:59:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 64 [2021-12-15 11:59:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:50,777 INFO L225 Difference]: With dead ends: 5083 [2021-12-15 11:59:50,777 INFO L226 Difference]: Without dead ends: 4633 [2021-12-15 11:59:50,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:59:50,780 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:50,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-12-15 11:59:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2021-12-15 11:59:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.5568589897055303) internal successors, (6503), 4178 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states 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 11:59:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6503 transitions. [2021-12-15 11:59:50,915 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6503 transitions. Word has length 64 [2021-12-15 11:59:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:50,916 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6503 transitions. [2021-12-15 11:59:50,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 11:59:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6503 transitions. [2021-12-15 11:59:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:59:50,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:50,918 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:59:50,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:59:50,918 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-12-15 11:59:50,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:50,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514811975] [2021-12-15 11:59:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:50,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:59:50,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514811975] [2021-12-15 11:59:50,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514811975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:50,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:50,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:59:50,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272789435] [2021-12-15 11:59:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:50,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:50,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:50,949 INFO L87 Difference]: Start difference. First operand 4179 states and 6503 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 11:59:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:51,045 INFO L93 Difference]: Finished difference Result 6831 states and 10205 transitions. [2021-12-15 11:59:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 11:59:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:51,052 INFO L225 Difference]: With dead ends: 6831 [2021-12-15 11:59:51,052 INFO L226 Difference]: Without dead ends: 4181 [2021-12-15 11:59:51,056 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 11:59:51,056 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:51,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-12-15 11:59:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2021-12-15 11:59:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.5448886760833134) internal successors, (6453), 4178 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states 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 11:59:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6453 transitions. [2021-12-15 11:59:51,206 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6453 transitions. Word has length 65 [2021-12-15 11:59:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:51,206 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6453 transitions. [2021-12-15 11:59:51,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 11:59:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6453 transitions. [2021-12-15 11:59:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:59:51,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:51,207 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:59:51,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:59:51,208 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-12-15 11:59:51,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879840120] [2021-12-15 11:59:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:51,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:59:51,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:51,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879840120] [2021-12-15 11:59:51,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879840120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:59:51,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:59:51,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:59:51,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864182771] [2021-12-15 11:59:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:59:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:59:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:59:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:59:51,235 INFO L87 Difference]: Start difference. First operand 4179 states and 6453 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 11:59:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:51,300 INFO L93 Difference]: Finished difference Result 5507 states and 8280 transitions. [2021-12-15 11:59:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:59:51,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 11:59:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:51,306 INFO L225 Difference]: With dead ends: 5507 [2021-12-15 11:59:51,306 INFO L226 Difference]: Without dead ends: 2857 [2021-12-15 11:59:51,310 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 11:59:51,310 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:51,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:59:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-12-15 11:59:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2021-12-15 11:59:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2853 states have (on average 1.6133894146512444) internal successors, (4603), 2854 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states 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 11:59:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4603 transitions. [2021-12-15 11:59:51,377 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4603 transitions. Word has length 65 [2021-12-15 11:59:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:59:51,377 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 4603 transitions. [2021-12-15 11:59:51,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 11:59:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4603 transitions. [2021-12-15 11:59:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:59:51,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:59:51,378 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:59:51,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:59:51,379 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:59:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:59:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-12-15 11:59:51,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:59:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510444937] [2021-12-15 11:59:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:51,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:59:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:59:51,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:59:51,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510444937] [2021-12-15 11:59:51,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510444937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:59:51,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275321129] [2021-12-15 11:59:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:59:51,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:59:51,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:59:51,592 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 11:59:51,635 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 11:59:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:59:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 11:59:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:59:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:59:51,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:59:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:59:52,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275321129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:59:52,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:59:52,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-15 11:59:52,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014973388] [2021-12-15 11:59:52,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:59:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 11:59:52,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:59:52,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 11:59:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-15 11:59:52,331 INFO L87 Difference]: Start difference. First operand 2855 states and 4603 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 11:59:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:59:59,461 INFO L93 Difference]: Finished difference Result 21660 states and 29610 transitions. [2021-12-15 11:59:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-12-15 11:59:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 65 [2021-12-15 11:59:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:59:59,493 INFO L225 Difference]: With dead ends: 21660 [2021-12-15 11:59:59,493 INFO L226 Difference]: Without dead ends: 20110 [2021-12-15 11:59:59,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17700 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5018, Invalid=36802, Unknown=0, NotChecked=0, Total=41820 [2021-12-15 11:59:59,509 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 17099 mSDsluCounter, 10025 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17099 SdHoareTripleChecker+Valid, 11607 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 11:59:59,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17099 Valid, 11607 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 11:59:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2021-12-15 12:00:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 13931. [2021-12-15 12:00:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13929 states have (on average 1.3741115657979754) internal successors, (19140), 13930 states have internal predecessors, (19140), 0 states have call successors, (0), 0 states 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 12:00:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 19140 transitions. [2021-12-15 12:00:00,089 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 19140 transitions. Word has length 65 [2021-12-15 12:00:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:00,090 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 19140 transitions. [2021-12-15 12:00:00,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 12:00:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 19140 transitions. [2021-12-15 12:00:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:00:00,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:00,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:00,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:00:00,307 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,SelfDestructingSolverStorable14 [2021-12-15 12:00:00,308 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-12-15 12:00:00,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:00,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14847177] [2021-12-15 12:00:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:00,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:00,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14847177] [2021-12-15 12:00:00,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14847177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:00:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128818171] [2021-12-15 12:00:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:00,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:00,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:00:00,449 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 12:00:00,450 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 12:00:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 12:00:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:00:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:00,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:00:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:01,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128818171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:00:01,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:00:01,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-15 12:00:01,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330373854] [2021-12-15 12:00:01,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:00:01,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 12:00:01,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 12:00:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-15 12:00:01,396 INFO L87 Difference]: Start difference. First operand 13931 states and 19140 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 12:00:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:03,695 INFO L93 Difference]: Finished difference Result 56272 states and 74058 transitions. [2021-12-15 12:00:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 12:00:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 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 66 [2021-12-15 12:00:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:03,779 INFO L225 Difference]: With dead ends: 56272 [2021-12-15 12:00:03,779 INFO L226 Difference]: Without dead ends: 46210 [2021-12-15 12:00:03,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 12:00:03,802 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 12379 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12379 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:03,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12379 Valid, 5129 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 12:00:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46210 states. [2021-12-15 12:00:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46210 to 28584. [2021-12-15 12:00:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28584 states, 28582 states have (on average 1.3376950528304528) internal successors, (38234), 28583 states have internal predecessors, (38234), 0 states have call successors, (0), 0 states 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 12:00:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 38234 transitions. [2021-12-15 12:00:05,232 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 38234 transitions. Word has length 66 [2021-12-15 12:00:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:05,232 INFO L470 AbstractCegarLoop]: Abstraction has 28584 states and 38234 transitions. [2021-12-15 12:00:05,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 12:00:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 38234 transitions. [2021-12-15 12:00:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:00:05,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:05,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:05,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 12:00:05,452 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,SelfDestructingSolverStorable15 [2021-12-15 12:00:05,453 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2021-12-15 12:00:05,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:05,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336392768] [2021-12-15 12:00:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:05,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:05,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336392768] [2021-12-15 12:00:05,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336392768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:00:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201556816] [2021-12-15 12:00:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:05,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:05,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:00:05,608 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 12:00:05,612 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 12:00:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:00:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:00:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:06,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:00:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201556816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:00:07,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:00:07,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-15 12:00:07,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016378999] [2021-12-15 12:00:07,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:00:07,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 12:00:07,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 12:00:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-15 12:00:07,009 INFO L87 Difference]: Start difference. First operand 28584 states and 38234 transitions. Second operand has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 12:00:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:14,130 INFO L93 Difference]: Finished difference Result 160017 states and 209209 transitions. [2021-12-15 12:00:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 12:00:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 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 66 [2021-12-15 12:00:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:14,571 INFO L225 Difference]: With dead ends: 160017 [2021-12-15 12:00:14,571 INFO L226 Difference]: Without dead ends: 132962 [2021-12-15 12:00:14,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 12:00:14,623 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 17667 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17667 SdHoareTripleChecker+Valid, 4878 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:14,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17667 Valid, 4878 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 12:00:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132962 states. [2021-12-15 12:00:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132962 to 64538. [2021-12-15 12:00:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64538 states, 64536 states have (on average 1.3065420850378084) internal successors, (84319), 64537 states have internal predecessors, (84319), 0 states have call successors, (0), 0 states 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 12:00:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64538 states to 64538 states and 84319 transitions. [2021-12-15 12:00:18,745 INFO L78 Accepts]: Start accepts. Automaton has 64538 states and 84319 transitions. Word has length 66 [2021-12-15 12:00:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:18,745 INFO L470 AbstractCegarLoop]: Abstraction has 64538 states and 84319 transitions. [2021-12-15 12:00:18,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 12:00:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 64538 states and 84319 transitions. [2021-12-15 12:00:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:00:18,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:18,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:18,767 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 12:00:18,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:18,955 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-12-15 12:00:18,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:18,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986018661] [2021-12-15 12:00:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:18,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:18,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986018661] [2021-12-15 12:00:18,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986018661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:00:18,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:00:18,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:00:18,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112806816] [2021-12-15 12:00:18,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:00:18,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:00:18,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:00:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:00:18,991 INFO L87 Difference]: Start difference. First operand 64538 states and 84319 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 12:00:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:20,773 INFO L93 Difference]: Finished difference Result 92591 states and 120569 transitions. [2021-12-15 12:00:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:00:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 12:00:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:20,821 INFO L225 Difference]: With dead ends: 92591 [2021-12-15 12:00:20,821 INFO L226 Difference]: Without dead ends: 29582 [2021-12-15 12:00:20,857 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 12:00:20,858 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:20,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:00:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29582 states. [2021-12-15 12:00:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29582 to 26281. [2021-12-15 12:00:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26281 states, 26279 states have (on average 1.3022565546634195) internal successors, (34222), 26280 states have internal predecessors, (34222), 0 states have call successors, (0), 0 states 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 12:00:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26281 states to 26281 states and 34222 transitions. [2021-12-15 12:00:22,150 INFO L78 Accepts]: Start accepts. Automaton has 26281 states and 34222 transitions. Word has length 66 [2021-12-15 12:00:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:22,150 INFO L470 AbstractCegarLoop]: Abstraction has 26281 states and 34222 transitions. [2021-12-15 12:00:22,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 12:00:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 26281 states and 34222 transitions. [2021-12-15 12:00:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:00:22,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:22,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:22,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:00:22,152 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-12-15 12:00:22,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:22,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982026619] [2021-12-15 12:00:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:22,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 12:00:22,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:22,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982026619] [2021-12-15 12:00:22,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982026619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:00:22,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:00:22,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:00:22,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209749270] [2021-12-15 12:00:22,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:00:22,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:00:22,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:00:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:00:22,195 INFO L87 Difference]: Start difference. First operand 26281 states and 34222 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 12:00:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:23,501 INFO L93 Difference]: Finished difference Result 47092 states and 60783 transitions. [2021-12-15 12:00:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:00:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 66 [2021-12-15 12:00:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:23,526 INFO L225 Difference]: With dead ends: 47092 [2021-12-15 12:00:23,527 INFO L226 Difference]: Without dead ends: 22417 [2021-12-15 12:00:23,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:00:23,542 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4498 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:23,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 2965 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:00:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22417 states. [2021-12-15 12:00:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22417 to 22417. [2021-12-15 12:00:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22417 states, 22415 states have (on average 1.2865045728306936) internal successors, (28837), 22416 states have internal predecessors, (28837), 0 states have call successors, (0), 0 states 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 12:00:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 28837 transitions. [2021-12-15 12:00:24,760 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 28837 transitions. Word has length 66 [2021-12-15 12:00:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:24,761 INFO L470 AbstractCegarLoop]: Abstraction has 22417 states and 28837 transitions. [2021-12-15 12:00:24,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 12:00:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 28837 transitions. [2021-12-15 12:00:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:00:24,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:24,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:24,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:00:24,763 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-12-15 12:00:24,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:24,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781636007] [2021-12-15 12:00:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:24,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 12:00:24,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:24,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781636007] [2021-12-15 12:00:24,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781636007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:00:24,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:00:24,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:00:24,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785588386] [2021-12-15 12:00:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:00:24,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:00:24,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:00:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:00:24,827 INFO L87 Difference]: Start difference. First operand 22417 states and 28837 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 12:00:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:25,773 INFO L93 Difference]: Finished difference Result 37943 states and 48228 transitions. [2021-12-15 12:00:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:00:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 66 [2021-12-15 12:00:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:25,798 INFO L225 Difference]: With dead ends: 37943 [2021-12-15 12:00:25,799 INFO L226 Difference]: Without dead ends: 17168 [2021-12-15 12:00:25,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:00:25,823 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4504 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:25,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 2959 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:00:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17168 states. [2021-12-15 12:00:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17168 to 17168. [2021-12-15 12:00:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17168 states, 17166 states have (on average 1.277117557963416) internal successors, (21923), 17167 states have internal predecessors, (21923), 0 states have call successors, (0), 0 states 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 12:00:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 21923 transitions. [2021-12-15 12:00:26,745 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 21923 transitions. Word has length 66 [2021-12-15 12:00:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:26,745 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 21923 transitions. [2021-12-15 12:00:26,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 12:00:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 21923 transitions. [2021-12-15 12:00:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 12:00:26,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:26,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:26,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 12:00:26,746 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-12-15 12:00:26,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:26,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260332764] [2021-12-15 12:00:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:26,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 12:00:26,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:26,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260332764] [2021-12-15 12:00:26,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260332764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:00:26,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:00:26,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:00:26,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113110839] [2021-12-15 12:00:26,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:00:26,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:00:26,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:00:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:00:26,818 INFO L87 Difference]: Start difference. First operand 17168 states and 21923 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 12:00:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:27,763 INFO L93 Difference]: Finished difference Result 29362 states and 36948 transitions. [2021-12-15 12:00:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:00:27,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 66 [2021-12-15 12:00:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:27,781 INFO L225 Difference]: With dead ends: 29362 [2021-12-15 12:00:27,781 INFO L226 Difference]: Without dead ends: 13759 [2021-12-15 12:00:27,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:00:27,794 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4510 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:27,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:00:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2021-12-15 12:00:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13759. [2021-12-15 12:00:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13757 states have (on average 1.279712146543578) internal successors, (17605), 13758 states have internal predecessors, (17605), 0 states have call successors, (0), 0 states 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 12:00:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 17605 transitions. [2021-12-15 12:00:28,559 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 17605 transitions. Word has length 66 [2021-12-15 12:00:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 13759 states and 17605 transitions. [2021-12-15 12:00:28,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 12:00:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 17605 transitions. [2021-12-15 12:00:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:00:28,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:28,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:28,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 12:00:28,563 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-12-15 12:00:28,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:28,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53895006] [2021-12-15 12:00:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:28,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:28,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:28,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53895006] [2021-12-15 12:00:28,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53895006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:00:28,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682495034] [2021-12-15 12:00:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:28,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:28,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:00:28,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:00:28,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 12:00:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:29,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 12:00:29,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:00:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:30,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:00:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:30,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682495034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:00:30,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:00:30,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-12-15 12:00:30,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057600351] [2021-12-15 12:00:30,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:00:30,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 12:00:30,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 12:00:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 12:00:30,696 INFO L87 Difference]: Start difference. First operand 13759 states and 17605 transitions. Second operand has 33 states, 33 states have (on average 5.0) internal successors, (165), 33 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 12:00:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:33,555 INFO L93 Difference]: Finished difference Result 29455 states and 36844 transitions. [2021-12-15 12:00:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 12:00:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0) internal successors, (165), 33 states have internal predecessors, (165), 0 states have call successors, (0), 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 67 [2021-12-15 12:00:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:33,587 INFO L225 Difference]: With dead ends: 29455 [2021-12-15 12:00:33,587 INFO L226 Difference]: Without dead ends: 24181 [2021-12-15 12:00:33,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=576, Invalid=2180, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 12:00:33,595 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 11494 mSDsluCounter, 18958 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11494 SdHoareTripleChecker+Valid, 20546 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:33,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11494 Valid, 20546 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 12:00:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24181 states. [2021-12-15 12:00:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24181 to 12017. [2021-12-15 12:00:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12015 states have (on average 1.2845609654598418) internal successors, (15434), 12016 states have internal predecessors, (15434), 0 states have call successors, (0), 0 states 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 12:00:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 15434 transitions. [2021-12-15 12:00:34,350 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 15434 transitions. Word has length 67 [2021-12-15 12:00:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:34,350 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 15434 transitions. [2021-12-15 12:00:34,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.0) internal successors, (165), 33 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 12:00:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 15434 transitions. [2021-12-15 12:00:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:00:34,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:34,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:00:34,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 12:00:34,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:34,552 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash 138650479, now seen corresponding path program 1 times [2021-12-15 12:00:34,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:34,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287677827] [2021-12-15 12:00:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:34,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:34,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:34,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287677827] [2021-12-15 12:00:34,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287677827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:00:34,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946409788] [2021-12-15 12:00:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:34,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:00:34,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:00:34,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 12:00:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:34,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 12:00:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:00:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:35,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:00:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:36,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946409788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:00:36,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:00:36,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2021-12-15 12:00:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028209729] [2021-12-15 12:00:36,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:00:36,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 12:00:36,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:00:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 12:00:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-12-15 12:00:36,558 INFO L87 Difference]: Start difference. First operand 12017 states and 15434 transitions. Second operand has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 12:00:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:00:38,805 INFO L93 Difference]: Finished difference Result 22127 states and 27935 transitions. [2021-12-15 12:00:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 12:00:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 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 67 [2021-12-15 12:00:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:00:38,839 INFO L225 Difference]: With dead ends: 22127 [2021-12-15 12:00:38,839 INFO L226 Difference]: Without dead ends: 16859 [2021-12-15 12:00:38,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 12:00:38,848 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 8443 mSDsluCounter, 17834 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8443 SdHoareTripleChecker+Valid, 19407 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:00:38,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8443 Valid, 19407 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 12:00:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2021-12-15 12:00:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 9437. [2021-12-15 12:00:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9437 states, 9435 states have (on average 1.2998410174880763) internal successors, (12264), 9436 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states 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 12:00:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 12264 transitions. [2021-12-15 12:00:39,485 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 12264 transitions. Word has length 67 [2021-12-15 12:00:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:00:39,485 INFO L470 AbstractCegarLoop]: Abstraction has 9437 states and 12264 transitions. [2021-12-15 12:00:39,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 12:00:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 12264 transitions. [2021-12-15 12:00:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 12:00:39,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:00:39,486 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 12:00:39,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 12:00:39,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 12:00:39,689 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:00:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:00:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1574375839, now seen corresponding path program 1 times [2021-12-15 12:00:39,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:00:39,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813134655] [2021-12-15 12:00:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:39,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:00:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:00:40,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:00:40,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813134655] [2021-12-15 12:00:40,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813134655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:00:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267467964] [2021-12-15 12:00:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:00:40,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:00:40,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:00:40,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:00:40,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 12:00:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:00:40,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 12:00:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates...