./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label25.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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:31:26,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:31:26,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:31:26,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:31:26,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:31:26,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:31:26,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:31:26,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:31:26,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:31:26,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:31:26,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:31:26,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:31:26,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:31:26,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:31:26,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:31:26,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:31:26,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:31:26,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:31:26,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:31:26,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:31:26,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:31:26,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:31:26,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:31:26,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:31:26,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:31:26,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:31:26,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:31:26,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:31:26,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:31:26,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:31:26,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:31:26,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:31:26,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:31:26,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:31:26,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:31:26,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:31:26,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:31:26,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:31:26,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:31:26,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:31:26,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:31:26,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:31:26,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:31:26,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:31:26,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:31:26,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:31:26,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:31:26,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:31:26,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:31:26,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:31:26,773 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:31:26,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:31:26,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:31:26,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:31:26,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:31:26,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:31:26,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:31:26,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:31:26,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:31:26,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:31:26,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:31:26,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:31:26,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:31:26,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:31:26,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:31:26,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:31:26,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:31:26,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:31:26,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:31:26,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:31:26,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:31:26,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:31:26,777 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:31:26,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:31:26,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:31:26,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:31:26,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2021-12-17 03:31:26,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:31:26,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:31:26,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:31:26,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:31:26,969 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:31:26,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-12-17 03:31:27,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3306cc0bc/6c38b0513b654ccd80dd11fcd92ece26/FLAG9db6e9e06 [2021-12-17 03:31:27,458 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:31:27,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-12-17 03:31:27,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3306cc0bc/6c38b0513b654ccd80dd11fcd92ece26/FLAG9db6e9e06 [2021-12-17 03:31:27,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3306cc0bc/6c38b0513b654ccd80dd11fcd92ece26 [2021-12-17 03:31:27,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:31:27,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:31:27,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:31:27,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:31:27,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:31:27,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:31:27" (1/1) ... [2021-12-17 03:31:27,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afffc05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:27, skipping insertion in model container [2021-12-17 03:31:27,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:31:27" (1/1) ... [2021-12-17 03:31:27,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:31:27,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:31:27,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-12-17 03:31:27,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:31:27,991 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:31:28,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-12-17 03:31:28,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:31:28,161 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:31:28,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28 WrapperNode [2021-12-17 03:31:28,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:31:28,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:31:28,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:31:28,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:31:28,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,287 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:31:28,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:31:28,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:31:28,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:31:28,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:31:28,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:31:28,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:31:28,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:31:28,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:31:28,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (1/1) ... [2021-12-17 03:31:28,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:31:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:28,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:31:28,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:31:28,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:31:28,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:31:28,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:31:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:31:28,481 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:31:28,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:31:29,563 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:31:29,575 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:31:29,576 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:31:29,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:31:29 BoogieIcfgContainer [2021-12-17 03:31:29,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:31:29,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:31:29,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:31:29,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:31:29,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:31:27" (1/3) ... [2021-12-17 03:31:29,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9db889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:31:29, skipping insertion in model container [2021-12-17 03:31:29,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:28" (2/3) ... [2021-12-17 03:31:29,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9db889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:31:29, skipping insertion in model container [2021-12-17 03:31:29,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:31:29" (3/3) ... [2021-12-17 03:31:29,584 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2021-12-17 03:31:29,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:31:29,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:31:29,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:31:29,637 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:31:29,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:31:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-17 03:31:29,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:29,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:29,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2021-12-17 03:31:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:29,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835411378] [2021-12-17 03:31:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:29,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:30,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835411378] [2021-12-17 03:31:30,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835411378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:30,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:30,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:30,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024573595] [2021-12-17 03:31:30,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:30,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:30,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:30,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:30,161 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:30,908 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2021-12-17 03:31:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-12-17 03:31:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:30,920 INFO L225 Difference]: With dead ends: 864 [2021-12-17 03:31:30,920 INFO L226 Difference]: Without dead ends: 468 [2021-12-17 03:31:30,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:30,925 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 98 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:30,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:31:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-17 03:31:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-12-17 03:31:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2021-12-17 03:31:30,969 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 180 [2021-12-17 03:31:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:30,970 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2021-12-17 03:31:30,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2021-12-17 03:31:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 03:31:30,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:30,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:30,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:31:30,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1866335650, now seen corresponding path program 1 times [2021-12-17 03:31:30,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:30,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484215392] [2021-12-17 03:31:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:30,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:31,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484215392] [2021-12-17 03:31:31,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484215392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:31,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:31,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:31,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160278730] [2021-12-17 03:31:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:31,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:31,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:31,047 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:31,691 INFO L93 Difference]: Finished difference Result 1336 states and 2182 transitions. [2021-12-17 03:31:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-12-17 03:31:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:31,695 INFO L225 Difference]: With dead ends: 1336 [2021-12-17 03:31:31,695 INFO L226 Difference]: Without dead ends: 884 [2021-12-17 03:31:31,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:31,697 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 265 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:31,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 133 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-17 03:31:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 878. [2021-12-17 03:31:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 1.5347776510832383) internal successors, (1346), 877 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1346 transitions. [2021-12-17 03:31:31,727 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1346 transitions. Word has length 185 [2021-12-17 03:31:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:31,728 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1346 transitions. [2021-12-17 03:31:31,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1346 transitions. [2021-12-17 03:31:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-17 03:31:31,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:31,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:31,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:31:31,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1604376817, now seen corresponding path program 1 times [2021-12-17 03:31:31,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:31,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254736925] [2021-12-17 03:31:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:31,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:31,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:31,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254736925] [2021-12-17 03:31:31,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254736925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:31,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:31,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:31,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402643192] [2021-12-17 03:31:31,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:31,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:31,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:31,819 INFO L87 Difference]: Start difference. First operand 878 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:32,428 INFO L93 Difference]: Finished difference Result 2586 states and 3985 transitions. [2021-12-17 03:31:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-12-17 03:31:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:32,433 INFO L225 Difference]: With dead ends: 2586 [2021-12-17 03:31:32,433 INFO L226 Difference]: Without dead ends: 1710 [2021-12-17 03:31:32,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:32,435 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:32,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 91 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-17 03:31:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1692. [2021-12-17 03:31:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 1.5150798344175045) internal successors, (2562), 1691 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2562 transitions. [2021-12-17 03:31:32,463 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2562 transitions. Word has length 188 [2021-12-17 03:31:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:32,463 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2562 transitions. [2021-12-17 03:31:32,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2562 transitions. [2021-12-17 03:31:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 03:31:32,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:32,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:32,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:31:32,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:32,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1626353628, now seen corresponding path program 1 times [2021-12-17 03:31:32,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:32,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897764404] [2021-12-17 03:31:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:32,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 03:31:32,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:32,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897764404] [2021-12-17 03:31:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897764404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:32,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:32,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:32,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755103544] [2021-12-17 03:31:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:32,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:32,535 INFO L87 Difference]: Start difference. First operand 1692 states and 2562 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:33,121 INFO L93 Difference]: Finished difference Result 5028 states and 7628 transitions. [2021-12-17 03:31:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 194 [2021-12-17 03:31:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:33,131 INFO L225 Difference]: With dead ends: 5028 [2021-12-17 03:31:33,131 INFO L226 Difference]: Without dead ends: 3338 [2021-12-17 03:31:33,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:33,139 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 232 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:33,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 149 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-12-17 03:31:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3333. [2021-12-17 03:31:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.445078031212485) internal successors, (4815), 3332 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4815 transitions. [2021-12-17 03:31:33,193 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4815 transitions. Word has length 194 [2021-12-17 03:31:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:33,193 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 4815 transitions. [2021-12-17 03:31:33,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4815 transitions. [2021-12-17 03:31:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-17 03:31:33,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:33,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:31:33,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash 820596195, now seen corresponding path program 1 times [2021-12-17 03:31:33,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:33,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880918583] [2021-12-17 03:31:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:33,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 03:31:33,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880918583] [2021-12-17 03:31:33,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880918583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:33,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:33,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:33,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935474811] [2021-12-17 03:31:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:33,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:33,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:33,272 INFO L87 Difference]: Start difference. First operand 3333 states and 4815 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:33,884 INFO L93 Difference]: Finished difference Result 8313 states and 11978 transitions. [2021-12-17 03:31:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 197 [2021-12-17 03:31:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:33,902 INFO L225 Difference]: With dead ends: 8313 [2021-12-17 03:31:33,903 INFO L226 Difference]: Without dead ends: 4982 [2021-12-17 03:31:33,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:33,909 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 217 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:33,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-12-17 03:31:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4975. [2021-12-17 03:31:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 1.4244069159630077) internal successors, (7085), 4974 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 7085 transitions. [2021-12-17 03:31:34,008 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 7085 transitions. Word has length 197 [2021-12-17 03:31:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:34,009 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 7085 transitions. [2021-12-17 03:31:34,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 7085 transitions. [2021-12-17 03:31:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-17 03:31:34,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:34,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:34,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:31:34,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1435508536, now seen corresponding path program 1 times [2021-12-17 03:31:34,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:34,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170539744] [2021-12-17 03:31:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:34,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 03:31:34,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:34,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170539744] [2021-12-17 03:31:34,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170539744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:34,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:34,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:34,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810207211] [2021-12-17 03:31:34,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:34,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:34,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:34,097 INFO L87 Difference]: Start difference. First operand 4975 states and 7085 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:34,744 INFO L93 Difference]: Finished difference Result 14883 states and 21202 transitions. [2021-12-17 03:31:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:34,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-12-17 03:31:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:34,770 INFO L225 Difference]: With dead ends: 14883 [2021-12-17 03:31:34,771 INFO L226 Difference]: Without dead ends: 9910 [2021-12-17 03:31:34,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:34,776 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 286 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:34,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 98 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9910 states. [2021-12-17 03:31:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9910 to 9901. [2021-12-17 03:31:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9901 states, 9900 states have (on average 1.3938383838383839) internal successors, (13799), 9900 states have internal predecessors, (13799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 13799 transitions. [2021-12-17 03:31:34,914 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 13799 transitions. Word has length 199 [2021-12-17 03:31:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:34,914 INFO L470 AbstractCegarLoop]: Abstraction has 9901 states and 13799 transitions. [2021-12-17 03:31:34,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 13799 transitions. [2021-12-17 03:31:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 03:31:34,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:34,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:34,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:31:34,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1391424235, now seen corresponding path program 1 times [2021-12-17 03:31:34,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:34,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464213938] [2021-12-17 03:31:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:34,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 03:31:34,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:34,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464213938] [2021-12-17 03:31:34,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464213938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:34,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:34,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:34,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251157097] [2021-12-17 03:31:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:34,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:34,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:34,967 INFO L87 Difference]: Start difference. First operand 9901 states and 13799 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:35,678 INFO L93 Difference]: Finished difference Result 29643 states and 41331 transitions. [2021-12-17 03:31:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-12-17 03:31:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:35,728 INFO L225 Difference]: With dead ends: 29643 [2021-12-17 03:31:35,729 INFO L226 Difference]: Without dead ends: 19744 [2021-12-17 03:31:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:35,745 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:35,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 190 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-12-17 03:31:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 19727. [2021-12-17 03:31:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19727 states, 19726 states have (on average 1.3818310858765082) internal successors, (27258), 19726 states have internal predecessors, (27258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19727 states to 19727 states and 27258 transitions. [2021-12-17 03:31:36,050 INFO L78 Accepts]: Start accepts. Automaton has 19727 states and 27258 transitions. Word has length 203 [2021-12-17 03:31:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:36,050 INFO L470 AbstractCegarLoop]: Abstraction has 19727 states and 27258 transitions. [2021-12-17 03:31:36,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19727 states and 27258 transitions. [2021-12-17 03:31:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-17 03:31:36,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:36,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:36,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:31:36,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1681277464, now seen corresponding path program 2 times [2021-12-17 03:31:36,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:36,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971047810] [2021-12-17 03:31:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:36,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:36,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:36,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971047810] [2021-12-17 03:31:36,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971047810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210862467] [2021-12-17 03:31:36,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 03:31:36,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:36,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:36,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:31:36,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 03:31:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 03:31:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:31:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 03:31:36,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:36,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210862467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:36,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:36,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 03:31:36,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050382641] [2021-12-17 03:31:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:36,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:31:36,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:31:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:31:36,645 INFO L87 Difference]: Start difference. First operand 19727 states and 27258 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:37,784 INFO L93 Difference]: Finished difference Result 64007 states and 88806 transitions. [2021-12-17 03:31:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:31:37,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 204 [2021-12-17 03:31:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:37,890 INFO L225 Difference]: With dead ends: 64007 [2021-12-17 03:31:37,896 INFO L226 Difference]: Without dead ends: 44282 [2021-12-17 03:31:37,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:31:37,915 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 410 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:37,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 233 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:31:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-12-17 03:31:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 36974. [2021-12-17 03:31:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36974 states, 36973 states have (on average 1.2513726232656264) internal successors, (46267), 36973 states have internal predecessors, (46267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36974 states to 36974 states and 46267 transitions. [2021-12-17 03:31:38,400 INFO L78 Accepts]: Start accepts. Automaton has 36974 states and 46267 transitions. Word has length 204 [2021-12-17 03:31:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:38,400 INFO L470 AbstractCegarLoop]: Abstraction has 36974 states and 46267 transitions. [2021-12-17 03:31:38,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 36974 states and 46267 transitions. [2021-12-17 03:31:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-17 03:31:38,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:38,437 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:38,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 03:31:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:38,724 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1440684223, now seen corresponding path program 1 times [2021-12-17 03:31:38,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327391426] [2021-12-17 03:31:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:38,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 03:31:38,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:38,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327391426] [2021-12-17 03:31:38,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327391426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:38,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:38,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:38,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797463102] [2021-12-17 03:31:38,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:38,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:31:38,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:31:38,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:38,837 INFO L87 Difference]: Start difference. First operand 36974 states and 46267 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:39,829 INFO L93 Difference]: Finished difference Result 73932 states and 92524 transitions. [2021-12-17 03:31:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:31:39,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-12-17 03:31:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:39,881 INFO L225 Difference]: With dead ends: 73932 [2021-12-17 03:31:39,881 INFO L226 Difference]: Without dead ends: 36960 [2021-12-17 03:31:39,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:31:39,917 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 788 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:39,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 43 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:31:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36960 states. [2021-12-17 03:31:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36960 to 36932. [2021-12-17 03:31:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36932 states, 36931 states have (on average 1.2277219679943678) internal successors, (45341), 36931 states have internal predecessors, (45341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36932 states to 36932 states and 45341 transitions. [2021-12-17 03:31:40,407 INFO L78 Accepts]: Start accepts. Automaton has 36932 states and 45341 transitions. Word has length 231 [2021-12-17 03:31:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:40,408 INFO L470 AbstractCegarLoop]: Abstraction has 36932 states and 45341 transitions. [2021-12-17 03:31:40,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 36932 states and 45341 transitions. [2021-12-17 03:31:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-17 03:31:40,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:40,435 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:40,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:31:40,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash 226517098, now seen corresponding path program 1 times [2021-12-17 03:31:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:40,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432339288] [2021-12-17 03:31:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:40,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 03:31:40,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:40,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432339288] [2021-12-17 03:31:40,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432339288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:40,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:40,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:40,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751424765] [2021-12-17 03:31:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:40,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:40,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:40,497 INFO L87 Difference]: Start difference. First operand 36932 states and 45341 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:41,304 INFO L93 Difference]: Finished difference Result 81562 states and 101842 transitions. [2021-12-17 03:31:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-12-17 03:31:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:41,359 INFO L225 Difference]: With dead ends: 81562 [2021-12-17 03:31:41,359 INFO L226 Difference]: Without dead ends: 44632 [2021-12-17 03:31:41,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:41,388 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:41,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 365 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44632 states. [2021-12-17 03:31:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44632 to 36098. [2021-12-17 03:31:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36098 states, 36097 states have (on average 1.207357952184392) internal successors, (43582), 36097 states have internal predecessors, (43582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36098 states to 36098 states and 43582 transitions. [2021-12-17 03:31:41,923 INFO L78 Accepts]: Start accepts. Automaton has 36098 states and 43582 transitions. Word has length 236 [2021-12-17 03:31:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:41,923 INFO L470 AbstractCegarLoop]: Abstraction has 36098 states and 43582 transitions. [2021-12-17 03:31:41,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36098 states and 43582 transitions. [2021-12-17 03:31:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-17 03:31:41,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:41,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:41,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:31:41,936 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -180940649, now seen corresponding path program 1 times [2021-12-17 03:31:41,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107802308] [2021-12-17 03:31:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:41,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 03:31:42,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:42,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107802308] [2021-12-17 03:31:42,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107802308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:42,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44416829] [2021-12-17 03:31:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:42,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:42,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:42,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:31:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:31:42,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:42,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44416829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:42,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:42,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:42,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961074751] [2021-12-17 03:31:42,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:42,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:42,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:42,454 INFO L87 Difference]: Start difference. First operand 36098 states and 43582 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:43,252 INFO L93 Difference]: Finished difference Result 89645 states and 108046 transitions. [2021-12-17 03:31:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 248 [2021-12-17 03:31:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:43,324 INFO L225 Difference]: With dead ends: 89645 [2021-12-17 03:31:43,324 INFO L226 Difference]: Without dead ends: 53549 [2021-12-17 03:31:43,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:43,351 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 207 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:43,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 334 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53549 states. [2021-12-17 03:31:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53549 to 41563. [2021-12-17 03:31:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41563 states, 41562 states have (on average 1.1607718589095808) internal successors, (48244), 41562 states have internal predecessors, (48244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41563 states to 41563 states and 48244 transitions. [2021-12-17 03:31:43,924 INFO L78 Accepts]: Start accepts. Automaton has 41563 states and 48244 transitions. Word has length 248 [2021-12-17 03:31:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:43,925 INFO L470 AbstractCegarLoop]: Abstraction has 41563 states and 48244 transitions. [2021-12-17 03:31:43,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 41563 states and 48244 transitions. [2021-12-17 03:31:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-17 03:31:43,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:43,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:43,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:44,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 03:31:44,154 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash 881097161, now seen corresponding path program 1 times [2021-12-17 03:31:44,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461723533] [2021-12-17 03:31:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:44,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 160 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 03:31:44,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:44,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461723533] [2021-12-17 03:31:44,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461723533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:44,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902421338] [2021-12-17 03:31:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:44,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:44,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:44,288 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) [2021-12-17 03:31:44,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:31:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 03:31:44,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902421338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:44,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:44,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:31:44,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373827877] [2021-12-17 03:31:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:44,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:44,968 INFO L87 Difference]: Start difference. First operand 41563 states and 48244 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 2 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:45,397 INFO L93 Difference]: Finished difference Result 83122 states and 96484 transitions. [2021-12-17 03:31:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 2 states have internal predecessors, (281), 0 states have call successors, (0), 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 340 [2021-12-17 03:31:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:45,440 INFO L225 Difference]: With dead ends: 83122 [2021-12-17 03:31:45,441 INFO L226 Difference]: Without dead ends: 41561 [2021-12-17 03:31:45,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:45,469 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:45,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 29 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:31:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41561 states. [2021-12-17 03:31:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41561 to 41561. [2021-12-17 03:31:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41561 states, 41560 states have (on average 1.1606833493743984) internal successors, (48238), 41560 states have internal predecessors, (48238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41561 states to 41561 states and 48238 transitions. [2021-12-17 03:31:46,027 INFO L78 Accepts]: Start accepts. Automaton has 41561 states and 48238 transitions. Word has length 340 [2021-12-17 03:31:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:46,027 INFO L470 AbstractCegarLoop]: Abstraction has 41561 states and 48238 transitions. [2021-12-17 03:31:46,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 2 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 41561 states and 48238 transitions. [2021-12-17 03:31:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-17 03:31:46,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:46,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:46,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 03:31:46,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:46,264 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 305981192, now seen corresponding path program 1 times [2021-12-17 03:31:46,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745914098] [2021-12-17 03:31:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:46,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 03:31:46,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:46,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745914098] [2021-12-17 03:31:46,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745914098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:46,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:46,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:31:46,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490850905] [2021-12-17 03:31:46,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:46,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:46,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:46,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:46,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:46,392 INFO L87 Difference]: Start difference. First operand 41561 states and 48238 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:47,216 INFO L93 Difference]: Finished difference Result 93665 states and 109283 transitions. [2021-12-17 03:31:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 349 [2021-12-17 03:31:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:47,273 INFO L225 Difference]: With dead ends: 93665 [2021-12-17 03:31:47,273 INFO L226 Difference]: Without dead ends: 52106 [2021-12-17 03:31:47,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:47,295 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 240 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:47,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 324 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:31:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52106 states. [2021-12-17 03:31:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52106 to 50277. [2021-12-17 03:31:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50277 states, 50276 states have (on average 1.1389529795528681) internal successors, (57262), 50276 states have internal predecessors, (57262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50277 states to 50277 states and 57262 transitions. [2021-12-17 03:31:47,859 INFO L78 Accepts]: Start accepts. Automaton has 50277 states and 57262 transitions. Word has length 349 [2021-12-17 03:31:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:47,859 INFO L470 AbstractCegarLoop]: Abstraction has 50277 states and 57262 transitions. [2021-12-17 03:31:47,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 50277 states and 57262 transitions. [2021-12-17 03:31:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-17 03:31:47,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:47,885 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:47,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:31:47,886 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1952098434, now seen corresponding path program 1 times [2021-12-17 03:31:47,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:47,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429180893] [2021-12-17 03:31:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:47,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 197 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-17 03:31:48,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429180893] [2021-12-17 03:31:48,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429180893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745968969] [2021-12-17 03:31:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:48,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:48,028 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) [2021-12-17 03:31:48,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:31:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:48,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 03:31:48,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:48,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745968969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:48,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:48,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:48,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070583623] [2021-12-17 03:31:48,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:48,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:48,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:48,767 INFO L87 Difference]: Start difference. First operand 50277 states and 57262 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:49,646 INFO L93 Difference]: Finished difference Result 115429 states and 130987 transitions. [2021-12-17 03:31:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:49,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 374 [2021-12-17 03:31:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:49,722 INFO L225 Difference]: With dead ends: 115429 [2021-12-17 03:31:49,723 INFO L226 Difference]: Without dead ends: 65154 [2021-12-17 03:31:49,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:49,762 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 163 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 155 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65154 states. [2021-12-17 03:31:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65154 to 64334. [2021-12-17 03:31:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64334 states, 64333 states have (on average 1.1205602101565293) internal successors, (72089), 64333 states have internal predecessors, (72089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64334 states to 64334 states and 72089 transitions. [2021-12-17 03:31:50,609 INFO L78 Accepts]: Start accepts. Automaton has 64334 states and 72089 transitions. Word has length 374 [2021-12-17 03:31:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:50,610 INFO L470 AbstractCegarLoop]: Abstraction has 64334 states and 72089 transitions. [2021-12-17 03:31:50,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 64334 states and 72089 transitions. [2021-12-17 03:31:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-17 03:31:50,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:50,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:50,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:50,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:50,860 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1806296777, now seen corresponding path program 1 times [2021-12-17 03:31:50,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475949288] [2021-12-17 03:31:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:50,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-17 03:31:50,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475949288] [2021-12-17 03:31:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475949288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950381406] [2021-12-17 03:31:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:50,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:50,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:51,000 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) [2021-12-17 03:31:51,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:31:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:51,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-17 03:31:51,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:51,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950381406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:51,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:51,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:31:51,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096764103] [2021-12-17 03:31:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:51,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:51,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:51,633 INFO L87 Difference]: Start difference. First operand 64334 states and 72089 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:52,064 INFO L93 Difference]: Finished difference Result 189336 states and 212131 transitions. [2021-12-17 03:31:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 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 402 [2021-12-17 03:31:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:52,231 INFO L225 Difference]: With dead ends: 189336 [2021-12-17 03:31:52,231 INFO L226 Difference]: Without dead ends: 125004 [2021-12-17 03:31:52,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:52,291 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 218 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:52,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 697 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:31:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125004 states. [2021-12-17 03:31:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125004 to 125002. [2021-12-17 03:31:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125002 states, 125001 states have (on average 1.1203190374477003) internal successors, (140041), 125001 states have internal predecessors, (140041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125002 states to 125002 states and 140041 transitions. [2021-12-17 03:31:54,297 INFO L78 Accepts]: Start accepts. Automaton has 125002 states and 140041 transitions. Word has length 402 [2021-12-17 03:31:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:54,297 INFO L470 AbstractCegarLoop]: Abstraction has 125002 states and 140041 transitions. [2021-12-17 03:31:54,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 2 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 125002 states and 140041 transitions. [2021-12-17 03:31:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-12-17 03:31:54,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:54,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:54,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:54,567 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,SelfDestructingSolverStorable14 [2021-12-17 03:31:54,568 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 518563696, now seen corresponding path program 1 times [2021-12-17 03:31:54,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511334090] [2021-12-17 03:31:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 235 proven. 3 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-17 03:31:54,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511334090] [2021-12-17 03:31:54,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511334090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:54,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269625406] [2021-12-17 03:31:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:54,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:54,960 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) [2021-12-17 03:31:54,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:31:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-12-17 03:31:55,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:55,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269625406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:55,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148224030] [2021-12-17 03:31:55,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:55,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:55,782 INFO L87 Difference]: Start difference. First operand 125002 states and 140041 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:56,925 INFO L93 Difference]: Finished difference Result 249610 states and 279645 transitions. [2021-12-17 03:31:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 427 [2021-12-17 03:31:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:57,095 INFO L225 Difference]: With dead ends: 249610 [2021-12-17 03:31:57,096 INFO L226 Difference]: Without dead ends: 124610 [2021-12-17 03:31:57,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:57,163 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:57,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124610 states. [2021-12-17 03:31:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124610 to 124594. [2021-12-17 03:31:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124594 states, 124593 states have (on average 1.1146693634473848) internal successors, (138880), 124593 states have internal predecessors, (138880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124594 states to 124594 states and 138880 transitions. [2021-12-17 03:31:58,854 INFO L78 Accepts]: Start accepts. Automaton has 124594 states and 138880 transitions. Word has length 427 [2021-12-17 03:31:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:58,855 INFO L470 AbstractCegarLoop]: Abstraction has 124594 states and 138880 transitions. [2021-12-17 03:31:58,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 124594 states and 138880 transitions. [2021-12-17 03:31:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-12-17 03:31:58,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:58,930 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:58,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:59,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 03:31:59,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 684420286, now seen corresponding path program 1 times [2021-12-17 03:31:59,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:59,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244327763] [2021-12-17 03:31:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:59,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 266 proven. 3 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-17 03:31:59,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244327763] [2021-12-17 03:31:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244327763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094348971] [2021-12-17 03:31:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:59,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:59,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:59,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 03:31:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:59,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:31:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 352 proven. 103 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-17 03:32:00,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:32:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 352 proven. 103 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-17 03:32:00,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094348971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:32:00,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:32:00,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-17 03:32:00,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223515832] [2021-12-17 03:32:00,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:32:00,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 03:32:00,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 03:32:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:00,724 INFO L87 Difference]: Start difference. First operand 124594 states and 138880 transitions. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:04,498 INFO L93 Difference]: Finished difference Result 413524 states and 462509 transitions. [2021-12-17 03:32:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:32:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 440 [2021-12-17 03:32:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:05,142 INFO L225 Difference]: With dead ends: 413524 [2021-12-17 03:32:05,143 INFO L226 Difference]: Without dead ends: 288932 [2021-12-17 03:32:05,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 876 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-17 03:32:05,201 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2150 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 4388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:05,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2150 Valid, 239 Invalid, 4388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 3592 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 03:32:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288932 states. [2021-12-17 03:32:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288932 to 248900. [2021-12-17 03:32:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248900 states, 248899 states have (on average 1.1062840750665932) internal successors, (275353), 248899 states have internal predecessors, (275353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248900 states to 248900 states and 275353 transitions. [2021-12-17 03:32:08,992 INFO L78 Accepts]: Start accepts. Automaton has 248900 states and 275353 transitions. Word has length 440 [2021-12-17 03:32:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:08,992 INFO L470 AbstractCegarLoop]: Abstraction has 248900 states and 275353 transitions. [2021-12-17 03:32:08,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 248900 states and 275353 transitions. [2021-12-17 03:32:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-12-17 03:32:09,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:09,144 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:09,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 03:32:09,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:09,345 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1054780706, now seen corresponding path program 1 times [2021-12-17 03:32:09,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:09,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287799083] [2021-12-17 03:32:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:09,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 510 proven. 18 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-17 03:32:09,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:09,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287799083] [2021-12-17 03:32:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287799083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:09,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860388633] [2021-12-17 03:32:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:09,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:09,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:09,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 03:32:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:32:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-17 03:32:10,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:10,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860388633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:10,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:10,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-17 03:32:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200466515] [2021-12-17 03:32:10,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:10,542 INFO L87 Difference]: Start difference. First operand 248900 states and 275353 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:12,612 INFO L93 Difference]: Finished difference Result 662283 states and 734064 transitions. [2021-12-17 03:32:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 515 [2021-12-17 03:32:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:13,373 INFO L225 Difference]: With dead ends: 662283 [2021-12-17 03:32:13,373 INFO L226 Difference]: Without dead ends: 413588 [2021-12-17 03:32:13,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:13,555 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 321 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:13,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 550 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:32:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413588 states. [2021-12-17 03:32:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413588 to 411962. [2021-12-17 03:32:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411962 states, 411961 states have (on average 1.1088598192547352) internal successors, (456807), 411961 states have internal predecessors, (456807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411962 states to 411962 states and 456807 transitions. [2021-12-17 03:32:19,862 INFO L78 Accepts]: Start accepts. Automaton has 411962 states and 456807 transitions. Word has length 515 [2021-12-17 03:32:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:19,863 INFO L470 AbstractCegarLoop]: Abstraction has 411962 states and 456807 transitions. [2021-12-17 03:32:19,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 411962 states and 456807 transitions. [2021-12-17 03:32:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-12-17 03:32:20,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:20,121 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:20,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 03:32:20,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 03:32:20,328 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1641043910, now seen corresponding path program 1 times [2021-12-17 03:32:20,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:20,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652761677] [2021-12-17 03:32:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:20,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 582 proven. 18 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 03:32:20,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652761677] [2021-12-17 03:32:20,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652761677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:20,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623572561] [2021-12-17 03:32:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:20,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:20,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:20,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 03:32:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:21,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:32:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-17 03:32:21,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:21,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623572561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:21,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:21,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 03:32:21,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286087636] [2021-12-17 03:32:21,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:21,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:21,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:21,827 INFO L87 Difference]: Start difference. First operand 411962 states and 456807 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:25,089 INFO L93 Difference]: Finished difference Result 835177 states and 925998 transitions. [2021-12-17 03:32:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 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 526 [2021-12-17 03:32:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:25,807 INFO L225 Difference]: With dead ends: 835177 [2021-12-17 03:32:25,808 INFO L226 Difference]: Without dead ends: 423420 [2021-12-17 03:32:25,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:32:25,991 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 155 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:25,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 365 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423420 states.