./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label22.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/Problem13_label22.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 a5646bd4d96b8fcc9e551b79d403a795dc3f85c7ce3ca7ca69beb4234714a055 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:38:18,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:38:18,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:38:18,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:38:18,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:38:18,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:38:18,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:38:18,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:38:18,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:38:18,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:38:18,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:38:18,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:38:18,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:38:18,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:38:18,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:38:19,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:38:19,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:38:19,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:38:19,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:38:19,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:38:19,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:38:19,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:38:19,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:38:19,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:38:19,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:38:19,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:38:19,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:38:19,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:38:19,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:38:19,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:38:19,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:38:19,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:38:19,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:38:19,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:38:19,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:38:19,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:38:19,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:38:19,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:38:19,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:38:19,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:38:19,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:38:19,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:38:19,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:38:19,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:38:19,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:38:19,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:38:19,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:38:19,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:38:19,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:38:19,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:38:19,054 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:38:19,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:38:19,055 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:38:19,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:38:19,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:38:19,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:38:19,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:38:19,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:38:19,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:38:19,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:38:19,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:38:19,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:38:19,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:38:19,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:38:19,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:38:19,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:38:19,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:38:19,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:38:19,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:38:19,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:38:19,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:38:19,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:38:19,058 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:38:19,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:38:19,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:38:19,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:38:19,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5646bd4d96b8fcc9e551b79d403a795dc3f85c7ce3ca7ca69beb4234714a055 [2021-12-17 04:38:19,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:38:19,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:38:19,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:38:19,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:38:19,280 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:38:19,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label22.c [2021-12-17 04:38:19,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe50482e/e7f86200efcf4bc6a3225fbd20447a2f/FLAG3e964f57c [2021-12-17 04:38:19,976 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:38:19,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label22.c [2021-12-17 04:38:20,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe50482e/e7f86200efcf4bc6a3225fbd20447a2f/FLAG3e964f57c [2021-12-17 04:38:20,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe50482e/e7f86200efcf4bc6a3225fbd20447a2f [2021-12-17 04:38:20,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:38:20,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:38:20,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:38:20,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:38:20,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:38:20,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:38:20" (1/1) ... [2021-12-17 04:38:20,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b6b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:20, skipping insertion in model container [2021-12-17 04:38:20,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:38:20" (1/1) ... [2021-12-17 04:38:20,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:38:20,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:38:20,728 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/Problem13_label22.c[4777,4790] [2021-12-17 04:38:21,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:38:21,571 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:38:21,598 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/Problem13_label22.c[4777,4790] [2021-12-17 04:38:22,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:38:22,044 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:38:22,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22 WrapperNode [2021-12-17 04:38:22,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:38:22,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:38:22,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:38:22,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:38:22,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:22,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:22,803 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:38:22,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:38:22,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:38:22,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:38:22,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:38:22,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:22,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:22,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:22,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:23,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:23,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:23,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:23,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:38:23,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:38:23,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:38:23,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:38:23,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (1/1) ... [2021-12-17 04:38:23,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:38:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:23,404 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 04:38:23,423 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 04:38:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:38:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:38:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:38:23,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:38:23,516 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:38:23,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:38:27,604 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:38:27,624 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:38:27,624 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:38:27,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:38:27 BoogieIcfgContainer [2021-12-17 04:38:27,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:38:27,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:38:27,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:38:27,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:38:27,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:38:20" (1/3) ... [2021-12-17 04:38:27,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6497ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:38:27, skipping insertion in model container [2021-12-17 04:38:27,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:38:22" (2/3) ... [2021-12-17 04:38:27,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6497ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:38:27, skipping insertion in model container [2021-12-17 04:38:27,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:38:27" (3/3) ... [2021-12-17 04:38:27,635 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label22.c [2021-12-17 04:38:27,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:38:27,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:38:27,697 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:38:27,702 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 04:38:27,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:38:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states 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 04:38:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 04:38:27,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:27,741 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] [2021-12-17 04:38:27,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2021-12-17 04:38:27,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:27,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095882793] [2021-12-17 04:38:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:27,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:27,990 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 04:38:27,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:27,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095882793] [2021-12-17 04:38:27,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095882793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:27,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:27,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:38:27,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579916332] [2021-12-17 04:38:27,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:27,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:27,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:28,032 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 04:38:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:32,274 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-17 04:38:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-12-17 04:38:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:32,298 INFO L225 Difference]: With dead ends: 3121 [2021-12-17 04:38:32,298 INFO L226 Difference]: Without dead ends: 1944 [2021-12-17 04:38:32,305 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 04:38:32,311 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 957 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:32,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 04:38:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-17 04:38:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-17 04:38:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 04:38:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-17 04:38:32,430 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 32 [2021-12-17 04:38:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:32,431 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-17 04:38:32,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 04:38:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-17 04:38:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 04:38:32,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:32,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:38:32,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:38:32,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1153859322, now seen corresponding path program 1 times [2021-12-17 04:38:32,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671701455] [2021-12-17 04:38:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:32,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:38:32,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671701455] [2021-12-17 04:38:32,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671701455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:32,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:32,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:32,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335693124] [2021-12-17 04:38:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:32,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:38:32,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:38:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:32,602 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 04:38:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:38,087 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-17 04:38:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:38:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-17 04:38:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:38,104 INFO L225 Difference]: With dead ends: 6152 [2021-12-17 04:38:38,104 INFO L226 Difference]: Without dead ends: 4281 [2021-12-17 04:38:38,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:38:38,112 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 2628 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:38,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 1017 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 04:38:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-17 04:38:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-17 04:38:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4774480018695957) internal successors, (6322), 4279 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states 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 04:38:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6322 transitions. [2021-12-17 04:38:38,191 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6322 transitions. Word has length 97 [2021-12-17 04:38:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:38,192 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6322 transitions. [2021-12-17 04:38:38,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 04:38:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6322 transitions. [2021-12-17 04:38:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 04:38:38,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:38,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:38:38,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:38:38,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1196887405, now seen corresponding path program 1 times [2021-12-17 04:38:38,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:38,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894708113] [2021-12-17 04:38:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:38,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:38:38,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894708113] [2021-12-17 04:38:38,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894708113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:38,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:38,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:38,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658166154] [2021-12-17 04:38:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:38,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:38,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:38,299 INFO L87 Difference]: Start difference. First operand 4280 states and 6322 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:38:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:41,365 INFO L93 Difference]: Finished difference Result 10949 states and 16959 transitions. [2021-12-17 04:38:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-12-17 04:38:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:41,447 INFO L225 Difference]: With dead ends: 10949 [2021-12-17 04:38:41,447 INFO L226 Difference]: Without dead ends: 7458 [2021-12-17 04:38:41,453 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 04:38:41,459 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 1024 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:41,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1502 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:38:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7458 states. [2021-12-17 04:38:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 7440. [2021-12-17 04:38:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7440 states, 7439 states have (on average 1.4999327866648744) internal successors, (11158), 7439 states have internal predecessors, (11158), 0 states have call successors, (0), 0 states 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 04:38:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7440 states to 7440 states and 11158 transitions. [2021-12-17 04:38:41,597 INFO L78 Accepts]: Start accepts. Automaton has 7440 states and 11158 transitions. Word has length 128 [2021-12-17 04:38:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:41,598 INFO L470 AbstractCegarLoop]: Abstraction has 7440 states and 11158 transitions. [2021-12-17 04:38:41,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 04:38:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 7440 states and 11158 transitions. [2021-12-17 04:38:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 04:38:41,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:41,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:38:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:38:41,606 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -711930848, now seen corresponding path program 1 times [2021-12-17 04:38:41,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:41,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274904049] [2021-12-17 04:38:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:41,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 04:38:41,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:41,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274904049] [2021-12-17 04:38:41,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274904049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:41,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:41,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:38:41,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728131200] [2021-12-17 04:38:41,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:41,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:41,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:41,770 INFO L87 Difference]: Start difference. First operand 7440 states and 11158 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 04:38:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:44,858 INFO L93 Difference]: Finished difference Result 20417 states and 31458 transitions. [2021-12-17 04:38:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 04:38:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:44,904 INFO L225 Difference]: With dead ends: 20417 [2021-12-17 04:38:44,904 INFO L226 Difference]: Without dead ends: 13766 [2021-12-17 04:38:44,918 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 04:38:44,919 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 939 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:44,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 862 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:38:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13766 states. [2021-12-17 04:38:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13766 to 13759. [2021-12-17 04:38:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13758 states have (on average 1.3924262247419683) internal successors, (19157), 13758 states have internal predecessors, (19157), 0 states have call successors, (0), 0 states 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 04:38:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 19157 transitions. [2021-12-17 04:38:45,216 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 19157 transitions. Word has length 203 [2021-12-17 04:38:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:45,218 INFO L470 AbstractCegarLoop]: Abstraction has 13759 states and 19157 transitions. [2021-12-17 04:38:45,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 04:38:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 19157 transitions. [2021-12-17 04:38:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-17 04:38:45,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:45,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:38:45,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:38:45,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash 199558270, now seen corresponding path program 1 times [2021-12-17 04:38:45,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:45,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297935499] [2021-12-17 04:38:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:45,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:38:45,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297935499] [2021-12-17 04:38:45,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297935499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:45,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:45,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:45,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001177271] [2021-12-17 04:38:45,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:45,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:45,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:45,350 INFO L87 Difference]: Start difference. First operand 13759 states and 19157 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 04:38:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:48,539 INFO L93 Difference]: Finished difference Result 33039 states and 46298 transitions. [2021-12-17 04:38:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2021-12-17 04:38:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:48,572 INFO L225 Difference]: With dead ends: 33039 [2021-12-17 04:38:48,573 INFO L226 Difference]: Without dead ends: 20069 [2021-12-17 04:38:48,586 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 04:38:48,587 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 863 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 3242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 823 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:48,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 1025 Invalid, 3242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [823 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:38:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-12-17 04:38:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 20059. [2021-12-17 04:38:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20059 states, 20058 states have (on average 1.2451889520390866) internal successors, (24976), 20058 states have internal predecessors, (24976), 0 states have call successors, (0), 0 states 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 04:38:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20059 states to 20059 states and 24976 transitions. [2021-12-17 04:38:48,844 INFO L78 Accepts]: Start accepts. Automaton has 20059 states and 24976 transitions. Word has length 210 [2021-12-17 04:38:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:48,846 INFO L470 AbstractCegarLoop]: Abstraction has 20059 states and 24976 transitions. [2021-12-17 04:38:48,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 04:38:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20059 states and 24976 transitions. [2021-12-17 04:38:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-17 04:38:48,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:48,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:38:48,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:38:48,852 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:48,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1968943216, now seen corresponding path program 1 times [2021-12-17 04:38:48,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:48,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779550746] [2021-12-17 04:38:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:48,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 04:38:48,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:48,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779550746] [2021-12-17 04:38:48,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779550746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:48,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:48,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:38:48,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227653842] [2021-12-17 04:38:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:48,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:48,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:48,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:48,988 INFO L87 Difference]: Start difference. First operand 20059 states and 24976 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:38:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:52,058 INFO L93 Difference]: Finished difference Result 58214 states and 72838 transitions. [2021-12-17 04:38:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 235 [2021-12-17 04:38:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:52,132 INFO L225 Difference]: With dead ends: 58214 [2021-12-17 04:38:52,133 INFO L226 Difference]: Without dead ends: 38944 [2021-12-17 04:38:52,161 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 04:38:52,162 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 875 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:52,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 980 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:38:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38944 states. [2021-12-17 04:38:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38944 to 34217. [2021-12-17 04:38:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34217 states, 34216 states have (on average 1.182896890343699) internal successors, (40474), 34216 states have internal predecessors, (40474), 0 states have call successors, (0), 0 states 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 04:38:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34217 states to 34217 states and 40474 transitions. [2021-12-17 04:38:52,693 INFO L78 Accepts]: Start accepts. Automaton has 34217 states and 40474 transitions. Word has length 235 [2021-12-17 04:38:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:52,693 INFO L470 AbstractCegarLoop]: Abstraction has 34217 states and 40474 transitions. [2021-12-17 04:38:52,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:38:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 34217 states and 40474 transitions. [2021-12-17 04:38:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-17 04:38:52,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:52,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:52,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:38:52,698 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1013398472, now seen corresponding path program 1 times [2021-12-17 04:38:52,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:52,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119968088] [2021-12-17 04:38:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:52,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 04:38:52,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:52,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119968088] [2021-12-17 04:38:52,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119968088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:52,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:52,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388827608] [2021-12-17 04:38:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:52,834 INFO L87 Difference]: Start difference. First operand 34217 states and 40474 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 04:38:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:55,951 INFO L93 Difference]: Finished difference Result 78681 states and 94366 transitions. [2021-12-17 04:38:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 299 [2021-12-17 04:38:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:56,021 INFO L225 Difference]: With dead ends: 78681 [2021-12-17 04:38:56,021 INFO L226 Difference]: Without dead ends: 45253 [2021-12-17 04:38:56,060 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 04:38:56,061 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 959 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:56,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 790 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:38:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45253 states. [2021-12-17 04:38:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45253 to 45241. [2021-12-17 04:38:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45241 states, 45240 states have (on average 1.181498673740053) internal successors, (53451), 45240 states have internal predecessors, (53451), 0 states have call successors, (0), 0 states 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 04:38:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45241 states to 45241 states and 53451 transitions. [2021-12-17 04:38:56,767 INFO L78 Accepts]: Start accepts. Automaton has 45241 states and 53451 transitions. Word has length 299 [2021-12-17 04:38:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:56,768 INFO L470 AbstractCegarLoop]: Abstraction has 45241 states and 53451 transitions. [2021-12-17 04:38:56,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 04:38:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 45241 states and 53451 transitions. [2021-12-17 04:38:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-17 04:38:56,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:56,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 04:38:56,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:38:56,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1112218508, now seen corresponding path program 1 times [2021-12-17 04:38:56,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:56,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046228831] [2021-12-17 04:38:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:56,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 04:38:56,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:56,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046228831] [2021-12-17 04:38:56,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046228831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:56,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:56,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:56,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697822658] [2021-12-17 04:38:56,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:56,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:56,901 INFO L87 Difference]: Start difference. First operand 45241 states and 53451 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 04:38:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:59,987 INFO L93 Difference]: Finished difference Result 89720 states and 106153 transitions. [2021-12-17 04:38:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:59,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 323 [2021-12-17 04:38:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:00,064 INFO L225 Difference]: With dead ends: 89720 [2021-12-17 04:39:00,065 INFO L226 Difference]: Without dead ends: 45268 [2021-12-17 04:39:00,092 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 04:39:00,093 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 768 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:00,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1903 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:39:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45268 states. [2021-12-17 04:39:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45268 to 45242. [2021-12-17 04:39:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45242 states, 45241 states have (on average 1.1768528547114343) internal successors, (53242), 45241 states have internal predecessors, (53242), 0 states have call successors, (0), 0 states 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 04:39:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45242 states to 45242 states and 53242 transitions. [2021-12-17 04:39:00,636 INFO L78 Accepts]: Start accepts. Automaton has 45242 states and 53242 transitions. Word has length 323 [2021-12-17 04:39:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:00,636 INFO L470 AbstractCegarLoop]: Abstraction has 45242 states and 53242 transitions. [2021-12-17 04:39:00,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 04:39:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45242 states and 53242 transitions. [2021-12-17 04:39:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-17 04:39:00,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:00,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:39:00,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:39:00,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash 766090434, now seen corresponding path program 1 times [2021-12-17 04:39:00,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682842459] [2021-12-17 04:39:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:00,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 04:39:00,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682842459] [2021-12-17 04:39:00,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682842459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:00,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:00,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:00,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898171938] [2021-12-17 04:39:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:00,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:39:00,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:39:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:39:00,747 INFO L87 Difference]: Start difference. First operand 45242 states and 53242 transitions. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 04:39:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:07,568 INFO L93 Difference]: Finished difference Result 129254 states and 153605 transitions. [2021-12-17 04:39:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:39:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 324 [2021-12-17 04:39:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:07,667 INFO L225 Difference]: With dead ends: 129254 [2021-12-17 04:39:07,667 INFO L226 Difference]: Without dead ends: 84801 [2021-12-17 04:39:07,699 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 04:39:07,700 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1723 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 6927 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 7953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 6927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:07,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 970 Invalid, 7953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 6927 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-17 04:39:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84801 states. [2021-12-17 04:39:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84801 to 84673. [2021-12-17 04:39:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84673 states, 84672 states have (on average 1.1691704459561603) internal successors, (98996), 84672 states have internal predecessors, (98996), 0 states have call successors, (0), 0 states 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 04:39:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84673 states to 84673 states and 98996 transitions. [2021-12-17 04:39:08,576 INFO L78 Accepts]: Start accepts. Automaton has 84673 states and 98996 transitions. Word has length 324 [2021-12-17 04:39:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:08,577 INFO L470 AbstractCegarLoop]: Abstraction has 84673 states and 98996 transitions. [2021-12-17 04:39:08,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 04:39:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 84673 states and 98996 transitions. [2021-12-17 04:39:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-12-17 04:39:08,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:08,582 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:08,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:39:08,582 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -777913654, now seen corresponding path program 1 times [2021-12-17 04:39:08,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548543139] [2021-12-17 04:39:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:08,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 219 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 04:39:08,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:08,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548543139] [2021-12-17 04:39:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548543139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:39:08,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419719822] [2021-12-17 04:39:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:08,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:39:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:39:08,815 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 04:39:08,816 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 04:39:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:39:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:39:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-17 04:39:09,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:39:09,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419719822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:09,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:39:09,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:39:09,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738620285] [2021-12-17 04:39:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:09,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:09,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:39:09,727 INFO L87 Difference]: Start difference. First operand 84673 states and 98996 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 04:39:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:12,835 INFO L93 Difference]: Finished difference Result 168555 states and 197197 transitions. [2021-12-17 04:39:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 352 [2021-12-17 04:39:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:12,927 INFO L225 Difference]: With dead ends: 168555 [2021-12-17 04:39:12,927 INFO L226 Difference]: Without dead ends: 84671 [2021-12-17 04:39:12,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:39:12,955 INFO L933 BasicCegarLoop]: 1360 mSDtfsCounter, 1127 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:12,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1442 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:39:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84671 states. [2021-12-17 04:39:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84671 to 84670. [2021-12-17 04:39:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84670 states, 84669 states have (on average 1.1299649222265529) internal successors, (95673), 84669 states have internal predecessors, (95673), 0 states have call successors, (0), 0 states 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 04:39:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84670 states to 84670 states and 95673 transitions. [2021-12-17 04:39:13,901 INFO L78 Accepts]: Start accepts. Automaton has 84670 states and 95673 transitions. Word has length 352 [2021-12-17 04:39:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:13,902 INFO L470 AbstractCegarLoop]: Abstraction has 84670 states and 95673 transitions. [2021-12-17 04:39:13,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 04:39:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 84670 states and 95673 transitions. [2021-12-17 04:39:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-17 04:39:13,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:13,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:39:13,929 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 04:39:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 04:39:14,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -223688760, now seen corresponding path program 1 times [2021-12-17 04:39:14,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:14,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350275902] [2021-12-17 04:39:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:14,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:39:14,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:14,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350275902] [2021-12-17 04:39:14,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350275902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:14,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:14,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:14,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46765892] [2021-12-17 04:39:14,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:14,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:14,452 INFO L87 Difference]: Start difference. First operand 84670 states and 95673 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 04:39:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:17,621 INFO L93 Difference]: Finished difference Result 179546 states and 201806 transitions. [2021-12-17 04:39:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 359 [2021-12-17 04:39:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:17,717 INFO L225 Difference]: With dead ends: 179546 [2021-12-17 04:39:17,718 INFO L226 Difference]: Without dead ends: 92512 [2021-12-17 04:39:17,740 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 04:39:17,742 INFO L933 BasicCegarLoop]: 1499 mSDtfsCounter, 1086 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:17,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1635 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:39:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92512 states. [2021-12-17 04:39:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92512 to 84629. [2021-12-17 04:39:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84629 states, 84628 states have (on average 1.0897693434796993) internal successors, (92225), 84628 states have internal predecessors, (92225), 0 states have call successors, (0), 0 states 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 04:39:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84629 states to 84629 states and 92225 transitions. [2021-12-17 04:39:18,621 INFO L78 Accepts]: Start accepts. Automaton has 84629 states and 92225 transitions. Word has length 359 [2021-12-17 04:39:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:18,622 INFO L470 AbstractCegarLoop]: Abstraction has 84629 states and 92225 transitions. [2021-12-17 04:39:18,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 04:39:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 84629 states and 92225 transitions. [2021-12-17 04:39:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-17 04:39:18,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:18,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:18,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:39:18,628 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -122794750, now seen corresponding path program 1 times [2021-12-17 04:39:18,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:18,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8518585] [2021-12-17 04:39:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:18,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 275 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 04:39:18,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:18,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8518585] [2021-12-17 04:39:18,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8518585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:39:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614391869] [2021-12-17 04:39:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:18,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:39:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:39:18,877 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 04:39:18,878 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 04:39:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:39:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:39:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:39:19,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:39:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614391869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:19,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:39:19,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:39:19,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021455086] [2021-12-17 04:39:19,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:19,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:19,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:39:19,807 INFO L87 Difference]: Start difference. First operand 84629 states and 92225 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 04:39:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:22,879 INFO L93 Difference]: Finished difference Result 180253 states and 196787 transitions. [2021-12-17 04:39:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 380 [2021-12-17 04:39:22,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:23,021 INFO L225 Difference]: With dead ends: 180253 [2021-12-17 04:39:23,021 INFO L226 Difference]: Without dead ends: 96413 [2021-12-17 04:39:23,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:39:23,063 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 1215 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:23,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 388 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:39:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96413 states. [2021-12-17 04:39:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96413 to 96413. [2021-12-17 04:39:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96413 states, 96412 states have (on average 1.0799174376633613) internal successors, (104117), 96412 states have internal predecessors, (104117), 0 states have call successors, (0), 0 states 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 04:39:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96413 states to 96413 states and 104117 transitions. [2021-12-17 04:39:24,016 INFO L78 Accepts]: Start accepts. Automaton has 96413 states and 104117 transitions. Word has length 380 [2021-12-17 04:39:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 96413 states and 104117 transitions. [2021-12-17 04:39:24,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 04:39:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 96413 states and 104117 transitions. [2021-12-17 04:39:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-17 04:39:24,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:24,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:39:24,051 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 04:39:24,239 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,SelfDestructingSolverStorable11 [2021-12-17 04:39:24,240 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash 675721545, now seen corresponding path program 1 times [2021-12-17 04:39:24,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:24,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130571750] [2021-12-17 04:39:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:24,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 04:39:24,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:24,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130571750] [2021-12-17 04:39:24,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130571750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:24,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:24,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:24,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152458190] [2021-12-17 04:39:24,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:24,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:24,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:24,633 INFO L87 Difference]: Start difference. First operand 96413 states and 104117 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 04:39:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:28,134 INFO L93 Difference]: Finished difference Result 213292 states and 231162 transitions. [2021-12-17 04:39:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:28,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 405 [2021-12-17 04:39:28,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:28,262 INFO L225 Difference]: With dead ends: 213292 [2021-12-17 04:39:28,262 INFO L226 Difference]: Without dead ends: 117668 [2021-12-17 04:39:28,306 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 04:39:28,306 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 765 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:28,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 1910 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:39:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117668 states. [2021-12-17 04:39:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117668 to 116088. [2021-12-17 04:39:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116088 states, 116087 states have (on average 1.0738497850749869) internal successors, (124660), 116087 states have internal predecessors, (124660), 0 states have call successors, (0), 0 states 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 04:39:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116088 states to 116088 states and 124660 transitions. [2021-12-17 04:39:29,587 INFO L78 Accepts]: Start accepts. Automaton has 116088 states and 124660 transitions. Word has length 405 [2021-12-17 04:39:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:29,588 INFO L470 AbstractCegarLoop]: Abstraction has 116088 states and 124660 transitions. [2021-12-17 04:39:29,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 04:39:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 116088 states and 124660 transitions. [2021-12-17 04:39:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-17 04:39:29,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:29,593 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 04:39:29,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:39:29,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1578591018, now seen corresponding path program 1 times [2021-12-17 04:39:29,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846878545] [2021-12-17 04:39:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:29,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:39:29,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:29,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846878545] [2021-12-17 04:39:29,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846878545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:29,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:29,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:29,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258554899] [2021-12-17 04:39:29,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:29,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:29,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:29,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:29,736 INFO L87 Difference]: Start difference. First operand 116088 states and 124660 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 04:39:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:33,479 INFO L93 Difference]: Finished difference Result 232167 states and 249248 transitions. [2021-12-17 04:39:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 423 [2021-12-17 04:39:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:33,628 INFO L225 Difference]: With dead ends: 232167 [2021-12-17 04:39:33,628 INFO L226 Difference]: Without dead ends: 115294 [2021-12-17 04:39:33,678 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 04:39:33,678 INFO L933 BasicCegarLoop]: 1652 mSDtfsCounter, 785 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:33,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1784 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:39:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115294 states. [2021-12-17 04:39:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115294 to 115280. [2021-12-17 04:39:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115280 states, 115279 states have (on average 1.0551878486107618) internal successors, (121641), 115279 states have internal predecessors, (121641), 0 states have call successors, (0), 0 states 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 04:39:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115280 states to 115280 states and 121641 transitions. [2021-12-17 04:39:34,846 INFO L78 Accepts]: Start accepts. Automaton has 115280 states and 121641 transitions. Word has length 423 [2021-12-17 04:39:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:34,846 INFO L470 AbstractCegarLoop]: Abstraction has 115280 states and 121641 transitions. [2021-12-17 04:39:34,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 04:39:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 115280 states and 121641 transitions. [2021-12-17 04:39:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-12-17 04:39:34,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:34,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 04:39:34,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:39:34,855 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash -869792363, now seen corresponding path program 1 times [2021-12-17 04:39:34,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:34,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863357805] [2021-12-17 04:39:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:34,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2021-12-17 04:39:35,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:35,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863357805] [2021-12-17 04:39:35,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863357805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:35,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:35,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:39:35,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668157963] [2021-12-17 04:39:35,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:35,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:39:35,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:39:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:39:35,331 INFO L87 Difference]: Start difference. First operand 115280 states and 121641 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 04:39:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:41,511 INFO L93 Difference]: Finished difference Result 276305 states and 291446 transitions. [2021-12-17 04:39:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:39:41,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 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 463 [2021-12-17 04:39:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:41,692 INFO L225 Difference]: With dead ends: 276305 [2021-12-17 04:39:41,693 INFO L226 Difference]: Without dead ends: 161814 [2021-12-17 04:39:41,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:39:41,764 INFO L933 BasicCegarLoop]: 1436 mSDtfsCounter, 1731 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 7534 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 8288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 7534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:41,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 1664 Invalid, 8288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 7534 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 04:39:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161814 states. [2021-12-17 04:39:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161814 to 153858. [2021-12-17 04:39:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153858 states, 153857 states have (on average 1.0530362609436035) internal successors, (162017), 153857 states have internal predecessors, (162017), 0 states have call successors, (0), 0 states 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 04:39:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153858 states to 153858 states and 162017 transitions. [2021-12-17 04:39:43,514 INFO L78 Accepts]: Start accepts. Automaton has 153858 states and 162017 transitions. Word has length 463 [2021-12-17 04:39:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:43,514 INFO L470 AbstractCegarLoop]: Abstraction has 153858 states and 162017 transitions. [2021-12-17 04:39:43,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 04:39:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 153858 states and 162017 transitions. [2021-12-17 04:39:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-12-17 04:39:43,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:43,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:43,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:39:43,525 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash -636223155, now seen corresponding path program 1 times [2021-12-17 04:39:43,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:43,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856660624] [2021-12-17 04:39:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:43,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 300 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 04:39:44,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:44,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856660624] [2021-12-17 04:39:44,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856660624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:39:44,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892691036] [2021-12-17 04:39:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:44,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:39:44,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:39:44,236 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 04:39:44,244 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 04:39:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:39:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:39:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-12-17 04:39:44,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:39:44,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892691036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:44,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:39:44,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:39:44,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930774237] [2021-12-17 04:39:44,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:44,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:44,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:39:44,921 INFO L87 Difference]: Start difference. First operand 153858 states and 162017 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 04:39:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:48,655 INFO L93 Difference]: Finished difference Result 337617 states and 355943 transitions. [2021-12-17 04:39:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 495 [2021-12-17 04:39:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:48,870 INFO L225 Difference]: With dead ends: 337617 [2021-12-17 04:39:48,870 INFO L226 Difference]: Without dead ends: 184548 [2021-12-17 04:39:48,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:39:48,948 INFO L933 BasicCegarLoop]: 1678 mSDtfsCounter, 777 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:48,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1824 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:39:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184548 states. [2021-12-17 04:39:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184548 to 182972. [2021-12-17 04:39:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182972 states, 182971 states have (on average 1.0481442414371676) internal successors, (191780), 182971 states have internal predecessors, (191780), 0 states have call successors, (0), 0 states 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 04:39:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182972 states to 182972 states and 191780 transitions. [2021-12-17 04:39:51,045 INFO L78 Accepts]: Start accepts. Automaton has 182972 states and 191780 transitions. Word has length 495 [2021-12-17 04:39:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:51,045 INFO L470 AbstractCegarLoop]: Abstraction has 182972 states and 191780 transitions. [2021-12-17 04:39:51,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 04:39:51,046 INFO L276 IsEmpty]: Start isEmpty. Operand 182972 states and 191780 transitions. [2021-12-17 04:39:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2021-12-17 04:39:51,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:51,078 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:39:51,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:39:51,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:39:51,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1035074661, now seen corresponding path program 1 times [2021-12-17 04:39:51,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869703965] [2021-12-17 04:39:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:51,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 536 proven. 110 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 04:39:52,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869703965] [2021-12-17 04:39:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869703965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:39:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554745779] [2021-12-17 04:39:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:52,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:39:52,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:39:52,098 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 04:39:52,104 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 04:39:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:52,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:39:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:39:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-12-17 04:39:53,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:39:53,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554745779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:53,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:39:53,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:39:53,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426753817] [2021-12-17 04:39:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:53,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:53,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:53,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:39:53,763 INFO L87 Difference]: Start difference. First operand 182972 states and 191780 transitions. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 2 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 04:39:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:57,047 INFO L93 Difference]: Finished difference Result 369892 states and 387734 transitions. [2021-12-17 04:39:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 2 states have internal predecessors, (445), 0 states have call successors, (0), 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 671 [2021-12-17 04:39:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:57,252 INFO L225 Difference]: With dead ends: 369892 [2021-12-17 04:39:57,252 INFO L226 Difference]: Without dead ends: 185345 [2021-12-17 04:39:57,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:39:57,350 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 616 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:57,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1070 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:39:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185345 states. [2021-12-17 04:39:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185345 to 185334. [2021-12-17 04:39:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185334 states, 185333 states have (on average 1.0432896462043997) internal successors, (193356), 185333 states have internal predecessors, (193356), 0 states have call successors, (0), 0 states 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 04:39:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185334 states to 185334 states and 193356 transitions. [2021-12-17 04:39:59,532 INFO L78 Accepts]: Start accepts. Automaton has 185334 states and 193356 transitions. Word has length 671 [2021-12-17 04:39:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:59,532 INFO L470 AbstractCegarLoop]: Abstraction has 185334 states and 193356 transitions. [2021-12-17 04:39:59,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 2 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 04:39:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 185334 states and 193356 transitions. [2021-12-17 04:39:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2021-12-17 04:39:59,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:59,559 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:59,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 04:39:59,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 04:39:59,761 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:59,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1189620861, now seen corresponding path program 1 times [2021-12-17 04:39:59,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:59,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098005783] [2021-12-17 04:39:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:59,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1418 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-12-17 04:40:00,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098005783] [2021-12-17 04:40:00,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098005783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:00,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:00,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:00,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035327459] [2021-12-17 04:40:00,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:00,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:00,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:00,443 INFO L87 Difference]: Start difference. First operand 185334 states and 193356 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 04:40:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:03,172 INFO L93 Difference]: Finished difference Result 368289 states and 384141 transitions. [2021-12-17 04:40:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:03,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 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 684 [2021-12-17 04:40:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:03,444 INFO L225 Difference]: With dead ends: 368289 [2021-12-17 04:40:03,444 INFO L226 Difference]: Without dead ends: 183744 [2021-12-17 04:40:03,552 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 04:40:03,552 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 1527 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:03,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 257 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 04:40:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183744 states.