./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 c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-tmp.no-commuhash-c3fed41 [2021-12-16 02:14:37,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:14:37,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:14:37,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:14:37,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:14:37,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:14:37,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:14:37,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:14:37,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:14:37,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:14:37,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:14:37,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:14:37,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:14:37,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:14:37,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:14:37,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:14:37,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:14:37,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:14:37,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:14:37,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:14:37,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:14:37,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:14:37,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:14:37,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:14:37,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:14:37,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:14:37,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:14:37,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:14:37,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:14:37,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:14:37,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:14:37,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:14:37,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:14:37,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:14:37,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:14:37,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:14:37,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:14:37,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:14:37,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:14:37,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:14:37,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:14:37,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:14:37,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:14:37,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:14:37,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:14:37,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:14:37,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:14:37,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:14:37,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:14:37,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:14:37,329 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:14:37,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:14:37,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:14:37,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:14:37,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:14:37,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:14:37,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:14:37,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:14:37,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:14:37,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:14:37,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:14:37,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:14:37,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:14:37,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:14:37,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:14:37,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:14:37,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:14:37,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:14:37,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:14:37,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:14:37,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d20f8abdac11d3a14265079d0abbd72a3c88bf6607f5bf46f98ccd96bfda721 [2021-12-16 02:14:37,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:14:37,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:14:37,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:14:37,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:14:37,528 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:14:37,529 INFO L432 ainManager$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 [2021-12-16 02:14:37,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68339b183/533158f892074328880cad77fcd62e51/FLAG8abc189bc [2021-12-16 02:14:38,114 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:14:38,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2021-12-16 02:14:38,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68339b183/533158f892074328880cad77fcd62e51/FLAG8abc189bc [2021-12-16 02:14:38,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68339b183/533158f892074328880cad77fcd62e51 [2021-12-16 02:14:38,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:14:38,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:14:38,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:14:38,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:14:38,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:14:38,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:14:38" (1/1) ... [2021-12-16 02:14:38,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf53734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:38, skipping insertion in model container [2021-12-16 02:14:38,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:14:38" (1/1) ... [2021-12-16 02:14:38,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:14:38,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:14:38,677 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] [2021-12-16 02:14:38,697 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] [2021-12-16 02:14:39,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:14:39,203 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:14:39,232 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] [2021-12-16 02:14:39,239 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] [2021-12-16 02:14:39,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:14:39,533 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:14:39,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39 WrapperNode [2021-12-16 02:14:39,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:14:39,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:14:39,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:14:39,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:14:39,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:39,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:39,895 INFO L137 Inliner]: procedures = 33, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4976 [2021-12-16 02:14:39,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:14:39,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:14:39,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:14:39,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:14:39,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:39,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:39,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:39,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:40,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:40,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:40,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:40,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:14:40,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:14:40,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:14:40,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:14:40,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (1/1) ... [2021-12-16 02:14:40,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:14:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:14:40,281 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) [2021-12-16 02:14:40,290 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 [2021-12-16 02:14:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:14:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:14:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:14:40,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:14:40,451 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:14:40,476 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:14:43,128 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:14:43,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:14:43,137 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:14:43,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:14:43 BoogieIcfgContainer [2021-12-16 02:14:43,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:14:43,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:14:43,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:14:43,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:14:43,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:14:38" (1/3) ... [2021-12-16 02:14:43,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74675657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:14:43, skipping insertion in model container [2021-12-16 02:14:43,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:14:39" (2/3) ... [2021-12-16 02:14:43,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74675657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:14:43, skipping insertion in model container [2021-12-16 02:14:43,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:14:43" (3/3) ... [2021-12-16 02:14:43,145 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2021-12-16 02:14:43,148 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:14:43,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:14:43,180 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:14:43,185 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 [2021-12-16 02:14:43,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:14:43,204 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) [2021-12-16 02:14:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 02:14:43,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:43,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:14:43,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1520027445, now seen corresponding path program 1 times [2021-12-16 02:14:43,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:43,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146130335] [2021-12-16 02:14:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:43,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:43,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146130335] [2021-12-16 02:14:43,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146130335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:43,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:43,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:14:43,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401732307] [2021-12-16 02:14:43,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:43,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:43,373 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) [2021-12-16 02:14:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:46,180 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2021-12-16 02:14:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:46,182 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 [2021-12-16 02:14:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:46,199 INFO L225 Difference]: With dead ends: 2489 [2021-12-16 02:14:46,199 INFO L226 Difference]: Without dead ends: 1563 [2021-12-16 02:14:46,209 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 [2021-12-16 02:14:46,211 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 979 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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 [2021-12-16 02:14:46,211 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] [2021-12-16 02:14:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-12-16 02:14:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2021-12-16 02:14:46,280 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) [2021-12-16 02:14:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2872 transitions. [2021-12-16 02:14:46,285 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2872 transitions. Word has length 16 [2021-12-16 02:14:46,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:46,285 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2872 transitions. [2021-12-16 02:14:46,285 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) [2021-12-16 02:14:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2872 transitions. [2021-12-16 02:14:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 02:14:46,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:46,286 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] [2021-12-16 02:14:46,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:14:46,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-12-16 02:14:46,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:46,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015549893] [2021-12-16 02:14:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:46,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:46,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:46,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015549893] [2021-12-16 02:14:46,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015549893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:46,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:46,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:46,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073582669] [2021-12-16 02:14:46,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:46,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:46,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:46,356 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) [2021-12-16 02:14:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:46,406 INFO L93 Difference]: Finished difference Result 1639 states and 2988 transitions. [2021-12-16 02:14:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:14:46,407 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 [2021-12-16 02:14:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:46,412 INFO L225 Difference]: With dead ends: 1639 [2021-12-16 02:14:46,412 INFO L226 Difference]: Without dead ends: 1599 [2021-12-16 02:14:46,413 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 [2021-12-16 02:14:46,414 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 [2021-12-16 02:14:46,414 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] [2021-12-16 02:14:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-16 02:14:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2021-12-16 02:14:46,438 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) [2021-12-16 02:14:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2856 transitions. [2021-12-16 02:14:46,442 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2856 transitions. Word has length 26 [2021-12-16 02:14:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:46,443 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2856 transitions. [2021-12-16 02:14:46,443 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) [2021-12-16 02:14:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2856 transitions. [2021-12-16 02:14:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 02:14:46,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:46,444 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] [2021-12-16 02:14:46,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:14:46,445 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:46,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-12-16 02:14:46,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:46,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990803766] [2021-12-16 02:14:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:46,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:46,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990803766] [2021-12-16 02:14:46,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990803766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:46,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:46,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:14:46,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137655132] [2021-12-16 02:14:46,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:46,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:46,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:46,494 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) [2021-12-16 02:14:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:46,519 INFO L93 Difference]: Finished difference Result 1629 states and 2958 transitions. [2021-12-16 02:14:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:46,520 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 [2021-12-16 02:14:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:46,525 INFO L225 Difference]: With dead ends: 1629 [2021-12-16 02:14:46,525 INFO L226 Difference]: Without dead ends: 1593 [2021-12-16 02:14:46,526 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 [2021-12-16 02:14:46,527 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 [2021-12-16 02:14:46,527 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] [2021-12-16 02:14:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-16 02:14:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2021-12-16 02:14:46,604 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) [2021-12-16 02:14:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2900 transitions. [2021-12-16 02:14:46,608 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2900 transitions. Word has length 41 [2021-12-16 02:14:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:46,609 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 2900 transitions. [2021-12-16 02:14:46,609 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) [2021-12-16 02:14:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2900 transitions. [2021-12-16 02:14:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 02:14:46,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:46,614 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] [2021-12-16 02:14:46,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:14:46,615 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-12-16 02:14:46,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:46,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616948920] [2021-12-16 02:14:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:46,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:46,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:46,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616948920] [2021-12-16 02:14:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616948920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:46,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:46,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813895764] [2021-12-16 02:14:46,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:46,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:46,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:46,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:46,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:46,678 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) [2021-12-16 02:14:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:46,754 INFO L93 Difference]: Finished difference Result 1975 states and 3500 transitions. [2021-12-16 02:14:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:14:46,755 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 [2021-12-16 02:14:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:46,761 INFO L225 Difference]: With dead ends: 1975 [2021-12-16 02:14:46,762 INFO L226 Difference]: Without dead ends: 1911 [2021-12-16 02:14:46,763 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 [2021-12-16 02:14:46,769 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 [2021-12-16 02:14:46,770 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] [2021-12-16 02:14:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-16 02:14:46,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2021-12-16 02:14:46,805 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) [2021-12-16 02:14:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2995 transitions. [2021-12-16 02:14:46,811 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2995 transitions. Word has length 41 [2021-12-16 02:14:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:46,811 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2995 transitions. [2021-12-16 02:14:46,812 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) [2021-12-16 02:14:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2995 transitions. [2021-12-16 02:14:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 02:14:46,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:46,814 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] [2021-12-16 02:14:46,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:14:46,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-12-16 02:14:46,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719123410] [2021-12-16 02:14:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:46,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:46,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:46,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719123410] [2021-12-16 02:14:46,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719123410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:46,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:46,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:14:46,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814065728] [2021-12-16 02:14:46,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:46,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:46,894 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) [2021-12-16 02:14:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:46,926 INFO L93 Difference]: Finished difference Result 1840 states and 3282 transitions. [2021-12-16 02:14:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:46,926 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 [2021-12-16 02:14:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:46,932 INFO L225 Difference]: With dead ends: 1840 [2021-12-16 02:14:46,932 INFO L226 Difference]: Without dead ends: 1714 [2021-12-16 02:14:46,933 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 [2021-12-16 02:14:46,934 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 [2021-12-16 02:14:46,934 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] [2021-12-16 02:14:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-16 02:14:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-16 02:14:46,965 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) [2021-12-16 02:14:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3083 transitions. [2021-12-16 02:14:46,970 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3083 transitions. Word has length 43 [2021-12-16 02:14:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:46,977 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 3083 transitions. [2021-12-16 02:14:46,977 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) [2021-12-16 02:14:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3083 transitions. [2021-12-16 02:14:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 02:14:46,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:46,979 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] [2021-12-16 02:14:46,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:14:46,979 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-12-16 02:14:46,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227959422] [2021-12-16 02:14:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:46,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:47,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:47,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227959422] [2021-12-16 02:14:47,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227959422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:47,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:47,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:47,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246739174] [2021-12-16 02:14:47,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:47,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:47,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:47,112 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) [2021-12-16 02:14:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:47,171 INFO L93 Difference]: Finished difference Result 1897 states and 3365 transitions. [2021-12-16 02:14:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:14:47,172 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 [2021-12-16 02:14:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:47,177 INFO L225 Difference]: With dead ends: 1897 [2021-12-16 02:14:47,177 INFO L226 Difference]: Without dead ends: 1714 [2021-12-16 02:14:47,178 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 [2021-12-16 02:14:47,179 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 [2021-12-16 02:14:47,179 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] [2021-12-16 02:14:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-16 02:14:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-16 02:14:47,205 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) [2021-12-16 02:14:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3080 transitions. [2021-12-16 02:14:47,210 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3080 transitions. Word has length 43 [2021-12-16 02:14:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:47,210 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 3080 transitions. [2021-12-16 02:14:47,210 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) [2021-12-16 02:14:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3080 transitions. [2021-12-16 02:14:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 02:14:47,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:47,211 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] [2021-12-16 02:14:47,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:14:47,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-12-16 02:14:47,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463825533] [2021-12-16 02:14:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:47,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:47,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463825533] [2021-12-16 02:14:47,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463825533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:47,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:47,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:14:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968544512] [2021-12-16 02:14:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:47,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:47,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:47,263 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) [2021-12-16 02:14:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:47,295 INFO L93 Difference]: Finished difference Result 2042 states and 3576 transitions. [2021-12-16 02:14:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:47,296 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 [2021-12-16 02:14:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:47,303 INFO L225 Difference]: With dead ends: 2042 [2021-12-16 02:14:47,303 INFO L226 Difference]: Without dead ends: 1859 [2021-12-16 02:14:47,304 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 [2021-12-16 02:14:47,304 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 [2021-12-16 02:14:47,305 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] [2021-12-16 02:14:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-12-16 02:14:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2021-12-16 02:14:47,340 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) [2021-12-16 02:14:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 3291 transitions. [2021-12-16 02:14:47,345 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 3291 transitions. Word has length 43 [2021-12-16 02:14:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:47,345 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 3291 transitions. [2021-12-16 02:14:47,345 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) [2021-12-16 02:14:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 3291 transitions. [2021-12-16 02:14:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 02:14:47,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:47,346 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] [2021-12-16 02:14:47,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 02:14:47,347 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-12-16 02:14:47,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:47,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969232134] [2021-12-16 02:14:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:47,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:47,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:47,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969232134] [2021-12-16 02:14:47,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969232134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:47,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:47,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:14:47,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281245762] [2021-12-16 02:14:47,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:47,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:47,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:47,374 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) [2021-12-16 02:14:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:47,410 INFO L93 Difference]: Finished difference Result 2441 states and 4149 transitions. [2021-12-16 02:14:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:47,411 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 [2021-12-16 02:14:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:47,418 INFO L225 Difference]: With dead ends: 2441 [2021-12-16 02:14:47,418 INFO L226 Difference]: Without dead ends: 2113 [2021-12-16 02:14:47,419 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 [2021-12-16 02:14:47,419 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 [2021-12-16 02:14:47,420 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] [2021-12-16 02:14:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-12-16 02:14:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2021-12-16 02:14:47,461 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) [2021-12-16 02:14:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3647 transitions. [2021-12-16 02:14:47,466 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3647 transitions. Word has length 43 [2021-12-16 02:14:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:47,466 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 3647 transitions. [2021-12-16 02:14:47,467 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) [2021-12-16 02:14:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3647 transitions. [2021-12-16 02:14:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 02:14:47,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:47,468 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] [2021-12-16 02:14:47,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 02:14:47,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-12-16 02:14:47,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912990635] [2021-12-16 02:14:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:47,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:47,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:47,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912990635] [2021-12-16 02:14:47,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912990635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:47,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:47,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576198916] [2021-12-16 02:14:47,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:47,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:47,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:47,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:47,514 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) [2021-12-16 02:14:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:47,591 INFO L93 Difference]: Finished difference Result 2634 states and 4375 transitions. [2021-12-16 02:14:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:14:47,592 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 [2021-12-16 02:14:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:47,600 INFO L225 Difference]: With dead ends: 2634 [2021-12-16 02:14:47,601 INFO L226 Difference]: Without dead ends: 2632 [2021-12-16 02:14:47,602 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 [2021-12-16 02:14:47,602 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 [2021-12-16 02:14:47,602 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] [2021-12-16 02:14:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-12-16 02:14:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2021-12-16 02:14:47,654 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) [2021-12-16 02:14:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3691 transitions. [2021-12-16 02:14:47,660 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3691 transitions. Word has length 44 [2021-12-16 02:14:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:47,660 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 3691 transitions. [2021-12-16 02:14:47,660 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) [2021-12-16 02:14:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3691 transitions. [2021-12-16 02:14:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:14:47,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:47,661 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] [2021-12-16 02:14:47,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 02:14:47,662 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-12-16 02:14:47,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:47,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12283350] [2021-12-16 02:14:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:47,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 02:14:47,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:47,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12283350] [2021-12-16 02:14:47,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12283350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:47,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:47,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:47,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261722405] [2021-12-16 02:14:47,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:47,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:47,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:47,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:47,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:47,704 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) [2021-12-16 02:14:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:47,827 INFO L93 Difference]: Finished difference Result 4187 states and 6539 transitions. [2021-12-16 02:14:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:14:47,828 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 [2021-12-16 02:14:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:47,839 INFO L225 Difference]: With dead ends: 4187 [2021-12-16 02:14:47,839 INFO L226 Difference]: Without dead ends: 3557 [2021-12-16 02:14:47,841 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 [2021-12-16 02:14:47,842 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 [2021-12-16 02:14:47,842 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] [2021-12-16 02:14:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-12-16 02:14:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2021-12-16 02:14:47,921 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) [2021-12-16 02:14:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4567 transitions. [2021-12-16 02:14:47,928 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4567 transitions. Word has length 64 [2021-12-16 02:14:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:47,928 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4567 transitions. [2021-12-16 02:14:47,929 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) [2021-12-16 02:14:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4567 transitions. [2021-12-16 02:14:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:14:47,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:47,930 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] [2021-12-16 02:14:47,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 02:14:47,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-12-16 02:14:47,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:47,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273187437] [2021-12-16 02:14:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:47,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:14:48,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:48,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273187437] [2021-12-16 02:14:48,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273187437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:48,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:48,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:48,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326075092] [2021-12-16 02:14:48,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:48,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:48,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:48,007 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) [2021-12-16 02:14:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:48,149 INFO L93 Difference]: Finished difference Result 4815 states and 7415 transitions. [2021-12-16 02:14:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:14:48,149 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 [2021-12-16 02:14:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:48,172 INFO L225 Difference]: With dead ends: 4815 [2021-12-16 02:14:48,172 INFO L226 Difference]: Without dead ends: 4185 [2021-12-16 02:14:48,175 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 [2021-12-16 02:14:48,176 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 [2021-12-16 02:14:48,176 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] [2021-12-16 02:14:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-12-16 02:14:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2021-12-16 02:14:48,301 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) [2021-12-16 02:14:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5871 transitions. [2021-12-16 02:14:48,311 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5871 transitions. Word has length 64 [2021-12-16 02:14:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:48,311 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5871 transitions. [2021-12-16 02:14:48,312 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) [2021-12-16 02:14:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5871 transitions. [2021-12-16 02:14:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:14:48,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:48,313 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] [2021-12-16 02:14:48,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:14:48,313 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-12-16 02:14:48,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:48,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254585125] [2021-12-16 02:14:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:48,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:14:48,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254585125] [2021-12-16 02:14:48,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254585125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:48,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:48,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:14:48,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641081985] [2021-12-16 02:14:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:48,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:14:48,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:14:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:14:48,364 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) [2021-12-16 02:14:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:48,515 INFO L93 Difference]: Finished difference Result 5083 states and 7795 transitions. [2021-12-16 02:14:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:14:48,516 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 [2021-12-16 02:14:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:48,525 INFO L225 Difference]: With dead ends: 5083 [2021-12-16 02:14:48,526 INFO L226 Difference]: Without dead ends: 4633 [2021-12-16 02:14:48,529 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 [2021-12-16 02:14:48,529 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 [2021-12-16 02:14:48,530 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] [2021-12-16 02:14:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-12-16 02:14:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2021-12-16 02:14:48,659 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) [2021-12-16 02:14:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6503 transitions. [2021-12-16 02:14:48,673 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6503 transitions. Word has length 64 [2021-12-16 02:14:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:48,673 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6503 transitions. [2021-12-16 02:14:48,674 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) [2021-12-16 02:14:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6503 transitions. [2021-12-16 02:14:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:14:48,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:48,675 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] [2021-12-16 02:14:48,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:14:48,676 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-12-16 02:14:48,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:48,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437166174] [2021-12-16 02:14:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:48,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:48,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437166174] [2021-12-16 02:14:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437166174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:48,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:48,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:14:48,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155834306] [2021-12-16 02:14:48,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:48,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:48,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:48,722 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) [2021-12-16 02:14:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:48,830 INFO L93 Difference]: Finished difference Result 6831 states and 10205 transitions. [2021-12-16 02:14:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:48,830 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 [2021-12-16 02:14:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:48,838 INFO L225 Difference]: With dead ends: 6831 [2021-12-16 02:14:48,838 INFO L226 Difference]: Without dead ends: 4181 [2021-12-16 02:14:48,842 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 [2021-12-16 02:14:48,843 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 [2021-12-16 02:14:48,843 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] [2021-12-16 02:14:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-12-16 02:14:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2021-12-16 02:14:48,960 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) [2021-12-16 02:14:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6453 transitions. [2021-12-16 02:14:49,021 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6453 transitions. Word has length 65 [2021-12-16 02:14:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:49,022 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6453 transitions. [2021-12-16 02:14:49,022 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) [2021-12-16 02:14:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6453 transitions. [2021-12-16 02:14:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:14:49,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:49,023 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] [2021-12-16 02:14:49,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:14:49,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-12-16 02:14:49,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336892089] [2021-12-16 02:14:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:49,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:49,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336892089] [2021-12-16 02:14:49,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336892089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:14:49,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:14:49,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:14:49,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590394197] [2021-12-16 02:14:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:14:49,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:14:49,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:14:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:14:49,053 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) [2021-12-16 02:14:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:49,114 INFO L93 Difference]: Finished difference Result 5507 states and 8280 transitions. [2021-12-16 02:14:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:14:49,114 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 [2021-12-16 02:14:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:49,120 INFO L225 Difference]: With dead ends: 5507 [2021-12-16 02:14:49,120 INFO L226 Difference]: Without dead ends: 2857 [2021-12-16 02:14:49,123 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 [2021-12-16 02:14:49,123 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 [2021-12-16 02:14:49,124 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] [2021-12-16 02:14:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-12-16 02:14:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2021-12-16 02:14:49,189 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) [2021-12-16 02:14:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4603 transitions. [2021-12-16 02:14:49,194 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4603 transitions. Word has length 65 [2021-12-16 02:14:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:49,195 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 4603 transitions. [2021-12-16 02:14:49,195 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) [2021-12-16 02:14:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4603 transitions. [2021-12-16 02:14:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:14:49,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:49,196 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] [2021-12-16 02:14:49,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:14:49,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-12-16 02:14:49,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:49,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985029508] [2021-12-16 02:14:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:49,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:49,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985029508] [2021-12-16 02:14:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985029508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:14:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609998593] [2021-12-16 02:14:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:49,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:14:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:14:49,392 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) [2021-12-16 02:14:49,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:14:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 02:14:49,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:14:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:49,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:14:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:50,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609998593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:14:50,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:14:50,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-16 02:14:50,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965777423] [2021-12-16 02:14:50,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:14:50,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 02:14:50,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 02:14:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-16 02:14:50,089 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) [2021-12-16 02:14:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:14:57,052 INFO L93 Difference]: Finished difference Result 21660 states and 29610 transitions. [2021-12-16 02:14:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-12-16 02:14:57,053 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 [2021-12-16 02:14:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:14:57,087 INFO L225 Difference]: With dead ends: 21660 [2021-12-16 02:14:57,088 INFO L226 Difference]: Without dead ends: 20110 [2021-12-16 02:14:57,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17700 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5018, Invalid=36802, Unknown=0, NotChecked=0, Total=41820 [2021-12-16 02:14:57,106 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 17099 mSDsluCounter, 10025 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 02:14:57,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17099 Valid, 11607 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 02:14:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2021-12-16 02:14:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 13931. [2021-12-16 02:14:57,736 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) [2021-12-16 02:14:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 19140 transitions. [2021-12-16 02:14:57,776 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 19140 transitions. Word has length 65 [2021-12-16 02:14:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:14:57,776 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 19140 transitions. [2021-12-16 02:14:57,777 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) [2021-12-16 02:14:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 19140 transitions. [2021-12-16 02:14:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:14:57,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:14:57,779 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] [2021-12-16 02:14:57,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 02:14:57,995 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 [2021-12-16 02:14:57,996 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:14:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:14:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-12-16 02:14:57,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:14:57,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964189758] [2021-12-16 02:14:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:57,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:14:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:58,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:14:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964189758] [2021-12-16 02:14:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964189758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:14:58,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242016165] [2021-12-16 02:14:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:14:58,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:14:58,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:14:58,194 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) [2021-12-16 02:14:58,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:14:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:14:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 02:14:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:14:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:14:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:14:59,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242016165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:14:59,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:14:59,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-16 02:14:59,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627739248] [2021-12-16 02:14:59,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:14:59,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 02:14:59,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:14:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 02:14:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-16 02:14:59,369 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) [2021-12-16 02:15:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:01,595 INFO L93 Difference]: Finished difference Result 56272 states and 74058 transitions. [2021-12-16 02:15:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 02:15:01,596 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 [2021-12-16 02:15:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:01,671 INFO L225 Difference]: With dead ends: 56272 [2021-12-16 02:15:01,671 INFO L226 Difference]: Without dead ends: 46210 [2021-12-16 02:15:01,690 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 [2021-12-16 02:15:01,690 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 12379 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-12-16 02:15:01,691 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] [2021-12-16 02:15:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46210 states. [2021-12-16 02:15:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46210 to 28584. [2021-12-16 02:15:03,184 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) [2021-12-16 02:15:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 38234 transitions. [2021-12-16 02:15:03,232 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 38234 transitions. Word has length 66 [2021-12-16 02:15:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:03,232 INFO L470 AbstractCegarLoop]: Abstraction has 28584 states and 38234 transitions. [2021-12-16 02:15:03,232 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) [2021-12-16 02:15:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 38234 transitions. [2021-12-16 02:15:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:15:03,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:03,234 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] [2021-12-16 02:15:03,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:15:03,447 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 [2021-12-16 02:15:03,447 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2021-12-16 02:15:03,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:03,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296042068] [2021-12-16 02:15:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:03,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:03,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296042068] [2021-12-16 02:15:03,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296042068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:15:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024796126] [2021-12-16 02:15:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:03,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:15:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:15:03,598 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) [2021-12-16 02:15:03,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:15:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:03,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 02:15:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:15:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:15:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:04,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024796126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:15:04,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:15:04,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-16 02:15:04,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672713634] [2021-12-16 02:15:04,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:15:04,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 02:15:04,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 02:15:04,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-16 02:15:04,680 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) [2021-12-16 02:15:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:11,857 INFO L93 Difference]: Finished difference Result 160017 states and 209209 transitions. [2021-12-16 02:15:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 02:15:11,858 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 [2021-12-16 02:15:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:12,105 INFO L225 Difference]: With dead ends: 160017 [2021-12-16 02:15:12,105 INFO L226 Difference]: Without dead ends: 132962 [2021-12-16 02:15:12,152 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 [2021-12-16 02:15:12,153 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 [2021-12-16 02:15:12,153 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] [2021-12-16 02:15:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132962 states. [2021-12-16 02:15:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132962 to 64538. [2021-12-16 02:15:16,236 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) [2021-12-16 02:15:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64538 states to 64538 states and 84319 transitions. [2021-12-16 02:15:16,363 INFO L78 Accepts]: Start accepts. Automaton has 64538 states and 84319 transitions. Word has length 66 [2021-12-16 02:15:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:16,363 INFO L470 AbstractCegarLoop]: Abstraction has 64538 states and 84319 transitions. [2021-12-16 02:15:16,363 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) [2021-12-16 02:15:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 64538 states and 84319 transitions. [2021-12-16 02:15:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:15:16,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:16,365 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] [2021-12-16 02:15:16,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 02:15:16,582 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 [2021-12-16 02:15:16,583 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-12-16 02:15:16,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:16,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114301401] [2021-12-16 02:15:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:16,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:16,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:16,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114301401] [2021-12-16 02:15:16,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114301401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:16,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:16,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:15:16,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256925922] [2021-12-16 02:15:16,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:16,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:15:16,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:16,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:15:16,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:15:16,612 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) [2021-12-16 02:15:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:18,442 INFO L93 Difference]: Finished difference Result 92591 states and 120569 transitions. [2021-12-16 02:15:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:15:18,443 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 [2021-12-16 02:15:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:18,488 INFO L225 Difference]: With dead ends: 92591 [2021-12-16 02:15:18,488 INFO L226 Difference]: Without dead ends: 29582 [2021-12-16 02:15:18,517 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 [2021-12-16 02:15:18,518 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 [2021-12-16 02:15:18,518 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] [2021-12-16 02:15:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29582 states. [2021-12-16 02:15:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29582 to 26281. [2021-12-16 02:15:19,800 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) [2021-12-16 02:15:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26281 states to 26281 states and 34222 transitions. [2021-12-16 02:15:19,838 INFO L78 Accepts]: Start accepts. Automaton has 26281 states and 34222 transitions. Word has length 66 [2021-12-16 02:15:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:19,838 INFO L470 AbstractCegarLoop]: Abstraction has 26281 states and 34222 transitions. [2021-12-16 02:15:19,839 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) [2021-12-16 02:15:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 26281 states and 34222 transitions. [2021-12-16 02:15:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:15:19,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:19,840 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] [2021-12-16 02:15:19,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 02:15:19,840 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-12-16 02:15:19,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:19,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191019424] [2021-12-16 02:15:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:19,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:15:19,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:19,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191019424] [2021-12-16 02:15:19,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191019424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:19,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:19,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:15:19,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086062250] [2021-12-16 02:15:19,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:19,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:15:19,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:15:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:15:19,876 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) [2021-12-16 02:15:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:21,087 INFO L93 Difference]: Finished difference Result 47092 states and 60783 transitions. [2021-12-16 02:15:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:15:21,088 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 [2021-12-16 02:15:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:21,118 INFO L225 Difference]: With dead ends: 47092 [2021-12-16 02:15:21,119 INFO L226 Difference]: Without dead ends: 22417 [2021-12-16 02:15:21,132 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 [2021-12-16 02:15:21,133 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 [2021-12-16 02:15:21,133 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] [2021-12-16 02:15:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22417 states. [2021-12-16 02:15:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22417 to 22417. [2021-12-16 02:15:22,409 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) [2021-12-16 02:15:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 28837 transitions. [2021-12-16 02:15:22,440 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 28837 transitions. Word has length 66 [2021-12-16 02:15:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:22,440 INFO L470 AbstractCegarLoop]: Abstraction has 22417 states and 28837 transitions. [2021-12-16 02:15:22,440 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) [2021-12-16 02:15:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 28837 transitions. [2021-12-16 02:15:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:15:22,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:22,442 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] [2021-12-16 02:15:22,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 02:15:22,442 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-12-16 02:15:22,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:22,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390957247] [2021-12-16 02:15:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:22,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 02:15:22,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390957247] [2021-12-16 02:15:22,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390957247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:22,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:22,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:15:22,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992585935] [2021-12-16 02:15:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:22,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:15:22,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:15:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:15:22,477 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) [2021-12-16 02:15:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:23,410 INFO L93 Difference]: Finished difference Result 37943 states and 48228 transitions. [2021-12-16 02:15:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:15:23,410 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 [2021-12-16 02:15:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:23,434 INFO L225 Difference]: With dead ends: 37943 [2021-12-16 02:15:23,434 INFO L226 Difference]: Without dead ends: 17168 [2021-12-16 02:15:23,451 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 [2021-12-16 02:15:23,453 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 [2021-12-16 02:15:23,453 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] [2021-12-16 02:15:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17168 states. [2021-12-16 02:15:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17168 to 17168. [2021-12-16 02:15:24,352 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) [2021-12-16 02:15:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 21923 transitions. [2021-12-16 02:15:24,376 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 21923 transitions. Word has length 66 [2021-12-16 02:15:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:24,376 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 21923 transitions. [2021-12-16 02:15:24,376 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) [2021-12-16 02:15:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 21923 transitions. [2021-12-16 02:15:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:15:24,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:24,377 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] [2021-12-16 02:15:24,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:15:24,378 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:24,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-12-16 02:15:24,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:24,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776584798] [2021-12-16 02:15:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:24,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 02:15:24,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:24,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776584798] [2021-12-16 02:15:24,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776584798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:24,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:24,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:15:24,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646880171] [2021-12-16 02:15:24,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:24,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:15:24,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:15:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:15:24,424 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) [2021-12-16 02:15:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:25,208 INFO L93 Difference]: Finished difference Result 29362 states and 36948 transitions. [2021-12-16 02:15:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:15:25,209 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 [2021-12-16 02:15:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:25,227 INFO L225 Difference]: With dead ends: 29362 [2021-12-16 02:15:25,227 INFO L226 Difference]: Without dead ends: 13759 [2021-12-16 02:15:25,235 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 [2021-12-16 02:15:25,235 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 [2021-12-16 02:15:25,236 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] [2021-12-16 02:15:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2021-12-16 02:15:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13759. [2021-12-16 02:15:26,094 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) [2021-12-16 02:15:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 17605 transitions. [2021-12-16 02:15:26,115 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 17605 transitions. Word has length 66 [2021-12-16 02:15:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 13759 states and 17605 transitions. [2021-12-16 02:15:26,115 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) [2021-12-16 02:15:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 17605 transitions. [2021-12-16 02:15:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 02:15:26,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:26,117 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] [2021-12-16 02:15:26,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:15:26,117 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:26,118 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-12-16 02:15:26,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:26,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610468762] [2021-12-16 02:15:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:26,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:26,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610468762] [2021-12-16 02:15:26,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610468762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:15:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638328501] [2021-12-16 02:15:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:26,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:15:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:15:26,460 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) [2021-12-16 02:15:26,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:15:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:26,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 02:15:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:15:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:27,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:15:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:28,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638328501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:15:28,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:15:28,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-12-16 02:15:28,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491890120] [2021-12-16 02:15:28,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:15:28,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 02:15:28,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 02:15:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 02:15:28,216 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) [2021-12-16 02:15:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:31,154 INFO L93 Difference]: Finished difference Result 29455 states and 36844 transitions. [2021-12-16 02:15:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 02:15:31,154 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 [2021-12-16 02:15:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:31,189 INFO L225 Difference]: With dead ends: 29455 [2021-12-16 02:15:31,189 INFO L226 Difference]: Without dead ends: 24181 [2021-12-16 02:15:31,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=576, Invalid=2180, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 02:15:31,198 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 [2021-12-16 02:15:31,198 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] [2021-12-16 02:15:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24181 states. [2021-12-16 02:15:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24181 to 12017. [2021-12-16 02:15:31,926 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) [2021-12-16 02:15:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 15434 transitions. [2021-12-16 02:15:31,942 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 15434 transitions. Word has length 67 [2021-12-16 02:15:31,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:31,943 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 15434 transitions. [2021-12-16 02:15:31,943 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) [2021-12-16 02:15:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 15434 transitions. [2021-12-16 02:15:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 02:15:31,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:31,944 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] [2021-12-16 02:15:31,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 02:15:32,144 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 [2021-12-16 02:15:32,145 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash 138650479, now seen corresponding path program 1 times [2021-12-16 02:15:32,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427768309] [2021-12-16 02:15:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:32,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:32,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:32,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427768309] [2021-12-16 02:15:32,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427768309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:15:32,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458890264] [2021-12-16 02:15:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:32,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:15:32,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:15:32,427 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) [2021-12-16 02:15:32,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:15:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 02:15:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:15:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:33,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:15:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:34,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458890264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:15:34,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:15:34,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2021-12-16 02:15:34,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560780] [2021-12-16 02:15:34,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:15:34,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 02:15:34,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 02:15:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-12-16 02:15:34,081 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) [2021-12-16 02:15:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:36,324 INFO L93 Difference]: Finished difference Result 22127 states and 27935 transitions. [2021-12-16 02:15:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 02:15:36,325 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 [2021-12-16 02:15:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:36,350 INFO L225 Difference]: With dead ends: 22127 [2021-12-16 02:15:36,351 INFO L226 Difference]: Without dead ends: 16859 [2021-12-16 02:15:36,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 02:15:36,358 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 [2021-12-16 02:15:36,358 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] [2021-12-16 02:15:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2021-12-16 02:15:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 9437. [2021-12-16 02:15:36,974 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) [2021-12-16 02:15:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 12264 transitions. [2021-12-16 02:15:36,986 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 12264 transitions. Word has length 67 [2021-12-16 02:15:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:36,986 INFO L470 AbstractCegarLoop]: Abstraction has 9437 states and 12264 transitions. [2021-12-16 02:15:36,986 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) [2021-12-16 02:15:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 12264 transitions. [2021-12-16 02:15:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:15:36,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:36,987 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] [2021-12-16 02:15:37,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:15:37,187 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 [2021-12-16 02:15:37,188 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1574375839, now seen corresponding path program 1 times [2021-12-16 02:15:37,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:37,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550996569] [2021-12-16 02:15:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:37,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:15:37,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550996569] [2021-12-16 02:15:37,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550996569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:15:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523281222] [2021-12-16 02:15:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:37,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:15:37,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:15:37,660 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) [2021-12-16 02:15:37,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:15:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:37,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 02:15:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates...