./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label01.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 92f387aee9179611b681311904b53986764751325111bb2d842a850437b442f7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:29:24,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:29:24,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:29:24,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:29:24,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:29:24,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:29:24,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:29:24,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:29:24,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:29:24,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:29:24,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:29:24,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:29:24,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:29:24,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:29:24,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:29:24,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:29:24,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:29:24,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:29:24,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:29:24,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:29:24,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:29:24,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:29:24,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:29:24,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:29:24,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:29:24,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:29:24,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:29:24,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:29:24,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:29:24,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:29:24,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:29:24,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:29:24,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:29:24,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:29:24,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:29:24,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:29:24,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:29:24,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:29:24,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:29:24,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:29:24,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:29:24,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:29:24,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:29:24,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:29:24,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:29:24,349 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:29:24,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:29:24,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:29:24,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:29:24,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:29:24,351 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:29:24,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:29:24,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:29:24,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:29:24,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:29:24,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:29:24,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:29:24,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:29:24,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:29:24,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:29:24,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:29:24,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:29:24,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:29:24,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:29:24,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:29:24,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:29:24,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:29:24,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:29:24,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:29:24,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:29:24,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:29:24,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:29:24,355 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:29:24,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:29:24,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:29:24,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:29:24,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92f387aee9179611b681311904b53986764751325111bb2d842a850437b442f7 [2021-12-17 03:29:24,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:29:24,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:29:24,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:29:24,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:29:24,594 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:29:24,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label01.c [2021-12-17 03:29:24,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e326a3b/fac4c520449c4104a66d90808668d1a3/FLAG79721c7f1 [2021-12-17 03:29:25,175 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:29:25,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label01.c [2021-12-17 03:29:25,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e326a3b/fac4c520449c4104a66d90808668d1a3/FLAG79721c7f1 [2021-12-17 03:29:25,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e326a3b/fac4c520449c4104a66d90808668d1a3 [2021-12-17 03:29:25,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:29:25,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:29:25,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:29:25,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:29:25,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:29:25,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:29:25" (1/1) ... [2021-12-17 03:29:25,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d35384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:25, skipping insertion in model container [2021-12-17 03:29:25,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:29:25" (1/1) ... [2021-12-17 03:29:25,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:29:25,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:29:25,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label01.c[59340,59353] [2021-12-17 03:29:26,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:29:26,030 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:29:26,209 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label01.c[59340,59353] [2021-12-17 03:29:26,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:29:26,231 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:29:26,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26 WrapperNode [2021-12-17 03:29:26,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:29:26,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:29:26,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:29:26,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:29:26,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,348 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:29:26,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:29:26,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:29:26,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:29:26,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:29:26,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:29:26,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:29:26,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:29:26,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:29:26,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (1/1) ... [2021-12-17 03:29:26,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:29:26,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:26,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:29:26,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:29:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:29:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:29:26,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:29:26,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:29:26,602 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:29:26,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:29:27,893 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:29:27,908 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:29:27,908 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:29:27,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:29:27 BoogieIcfgContainer [2021-12-17 03:29:27,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:29:27,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:29:27,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:29:27,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:29:27,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:29:25" (1/3) ... [2021-12-17 03:29:27,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3254d12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:29:27, skipping insertion in model container [2021-12-17 03:29:27,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:29:26" (2/3) ... [2021-12-17 03:29:27,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3254d12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:29:27, skipping insertion in model container [2021-12-17 03:29:27,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:29:27" (3/3) ... [2021-12-17 03:29:27,920 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label01.c [2021-12-17 03:29:27,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:29:27,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:29:27,970 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:29:27,977 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:29:27,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:29:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-17 03:29:28,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:28,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:28,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2112974262, now seen corresponding path program 1 times [2021-12-17 03:29:28,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:28,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130647504] [2021-12-17 03:29:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:28,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:28,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:28,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130647504] [2021-12-17 03:29:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130647504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:28,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:28,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:28,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011113920] [2021-12-17 03:29:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:28,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:28,544 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:29,549 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2021-12-17 03:29:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2021-12-17 03:29:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:29,570 INFO L225 Difference]: With dead ends: 810 [2021-12-17 03:29:29,571 INFO L226 Difference]: Without dead ends: 444 [2021-12-17 03:29:29,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:29,583 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 68 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:29,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 231 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:29:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-17 03:29:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-12-17 03:29:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4288939051918736) internal successors, (633), 443 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2021-12-17 03:29:29,634 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 186 [2021-12-17 03:29:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:29,635 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2021-12-17 03:29:29,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2021-12-17 03:29:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 03:29:29,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:29,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:29,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:29:29,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1373678807, now seen corresponding path program 1 times [2021-12-17 03:29:29,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:29,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505142011] [2021-12-17 03:29:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:29,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:29,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505142011] [2021-12-17 03:29:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505142011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:29,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:29,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:29,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881785345] [2021-12-17 03:29:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:29,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:29,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:29,779 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:30,457 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2021-12-17 03:29:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-12-17 03:29:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:30,467 INFO L225 Difference]: With dead ends: 1312 [2021-12-17 03:29:30,467 INFO L226 Difference]: Without dead ends: 870 [2021-12-17 03:29:30,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:30,470 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:30,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:29:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-12-17 03:29:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2021-12-17 03:29:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3941520467836257) internal successors, (1192), 855 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1192 transitions. [2021-12-17 03:29:30,497 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1192 transitions. Word has length 194 [2021-12-17 03:29:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:30,498 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1192 transitions. [2021-12-17 03:29:30,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1192 transitions. [2021-12-17 03:29:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-17 03:29:30,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:30,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:30,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:29:30,503 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1976884080, now seen corresponding path program 1 times [2021-12-17 03:29:30,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:30,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938905496] [2021-12-17 03:29:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:30,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 03:29:30,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938905496] [2021-12-17 03:29:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938905496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:30,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:30,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:30,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202614300] [2021-12-17 03:29:30,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:30,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:30,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:30,622 INFO L87 Difference]: Start difference. First operand 856 states and 1192 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:30,858 INFO L93 Difference]: Finished difference Result 2548 states and 3550 transitions. [2021-12-17 03:29:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 206 [2021-12-17 03:29:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:30,864 INFO L225 Difference]: With dead ends: 2548 [2021-12-17 03:29:30,864 INFO L226 Difference]: Without dead ends: 1694 [2021-12-17 03:29:30,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:30,870 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 361 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:30,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 585 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:29:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-12-17 03:29:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1691. [2021-12-17 03:29:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 1.393491124260355) internal successors, (2355), 1690 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2355 transitions. [2021-12-17 03:29:30,910 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2355 transitions. Word has length 206 [2021-12-17 03:29:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:30,911 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 2355 transitions. [2021-12-17 03:29:30,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2355 transitions. [2021-12-17 03:29:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-17 03:29:30,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:30,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:30,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:29:30,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash 57339644, now seen corresponding path program 1 times [2021-12-17 03:29:30,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085013496] [2021-12-17 03:29:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:30,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 03:29:31,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:31,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085013496] [2021-12-17 03:29:31,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085013496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:31,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:31,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:31,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584315951] [2021-12-17 03:29:31,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:31,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:31,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:31,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:31,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:31,021 INFO L87 Difference]: Start difference. First operand 1691 states and 2355 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:31,337 INFO L93 Difference]: Finished difference Result 3347 states and 4662 transitions. [2021-12-17 03:29:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 214 [2021-12-17 03:29:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:31,344 INFO L225 Difference]: With dead ends: 3347 [2021-12-17 03:29:31,344 INFO L226 Difference]: Without dead ends: 1658 [2021-12-17 03:29:31,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:31,354 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 326 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:31,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:29:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-12-17 03:29:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2021-12-17 03:29:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.352444176222088) internal successors, (2241), 1657 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2241 transitions. [2021-12-17 03:29:31,390 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2241 transitions. Word has length 214 [2021-12-17 03:29:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2241 transitions. [2021-12-17 03:29:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2241 transitions. [2021-12-17 03:29:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-17 03:29:31,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:31,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:31,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:29:31,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -502702108, now seen corresponding path program 1 times [2021-12-17 03:29:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507465990] [2021-12-17 03:29:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:31,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 03:29:31,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:31,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507465990] [2021-12-17 03:29:31,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507465990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453291319] [2021-12-17 03:29:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:31,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:31,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:29:31,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:29:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:31,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 03:29:32,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:32,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453291319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:32,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:32,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:29:32,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687369714] [2021-12-17 03:29:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:32,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:32,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:32,091 INFO L87 Difference]: Start difference. First operand 1658 states and 2241 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:32,304 INFO L93 Difference]: Finished difference Result 4969 states and 6718 transitions. [2021-12-17 03:29:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 215 [2021-12-17 03:29:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:32,318 INFO L225 Difference]: With dead ends: 4969 [2021-12-17 03:29:32,318 INFO L226 Difference]: Without dead ends: 3313 [2021-12-17 03:29:32,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:32,321 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 319 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:32,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 550 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:29:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2021-12-17 03:29:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 3311. [2021-12-17 03:29:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3311 states, 3310 states have (on average 1.3483383685800605) internal successors, (4463), 3310 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 4463 transitions. [2021-12-17 03:29:32,404 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 4463 transitions. Word has length 215 [2021-12-17 03:29:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:32,410 INFO L470 AbstractCegarLoop]: Abstraction has 3311 states and 4463 transitions. [2021-12-17 03:29:32,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 4463 transitions. [2021-12-17 03:29:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-17 03:29:32,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:32,417 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:32,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:32,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:32,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1069440014, now seen corresponding path program 1 times [2021-12-17 03:29:32,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:32,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097761713] [2021-12-17 03:29:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:32,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:32,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097761713] [2021-12-17 03:29:32,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097761713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104129070] [2021-12-17 03:29:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:32,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:32,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:29:32,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:29:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 03:29:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:33,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:29:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:33,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104129070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:29:33,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:29:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-17 03:29:33,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95323673] [2021-12-17 03:29:33,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:29:33,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 03:29:33,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 03:29:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:29:33,857 INFO L87 Difference]: Start difference. First operand 3311 states and 4463 transitions. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:36,224 INFO L93 Difference]: Finished difference Result 13672 states and 18981 transitions. [2021-12-17 03:29:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:29:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 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 224 [2021-12-17 03:29:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:36,257 INFO L225 Difference]: With dead ends: 13672 [2021-12-17 03:29:36,257 INFO L226 Difference]: Without dead ends: 10363 [2021-12-17 03:29:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 444 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:29:36,264 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1670 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:36,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 153 Invalid, 3274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:29:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-12-17 03:29:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 4548. [2021-12-17 03:29:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 1.3540796129316033) internal successors, (6157), 4547 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 6157 transitions. [2021-12-17 03:29:36,379 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 6157 transitions. Word has length 224 [2021-12-17 03:29:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:36,380 INFO L470 AbstractCegarLoop]: Abstraction has 4548 states and 6157 transitions. [2021-12-17 03:29:36,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 6157 transitions. [2021-12-17 03:29:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-17 03:29:36,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:36,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:36,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:36,609 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,SelfDestructingSolverStorable5 [2021-12-17 03:29:36,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1021971743, now seen corresponding path program 1 times [2021-12-17 03:29:36,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:36,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481315318] [2021-12-17 03:29:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:36,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:36,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:36,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481315318] [2021-12-17 03:29:36,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481315318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:36,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:36,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:36,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263320680] [2021-12-17 03:29:36,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:36,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:36,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:36,713 INFO L87 Difference]: Start difference. First operand 4548 states and 6157 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:37,356 INFO L93 Difference]: Finished difference Result 11537 states and 16084 transitions. [2021-12-17 03:29:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 227 [2021-12-17 03:29:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:37,374 INFO L225 Difference]: With dead ends: 11537 [2021-12-17 03:29:37,374 INFO L226 Difference]: Without dead ends: 6991 [2021-12-17 03:29:37,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:37,381 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 193 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:37,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 371 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2021-12-17 03:29:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 6984. [2021-12-17 03:29:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6983 states have (on average 1.2719461549477302) internal successors, (8882), 6983 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 8882 transitions. [2021-12-17 03:29:37,506 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 8882 transitions. Word has length 227 [2021-12-17 03:29:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:37,506 INFO L470 AbstractCegarLoop]: Abstraction has 6984 states and 8882 transitions. [2021-12-17 03:29:37,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 8882 transitions. [2021-12-17 03:29:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-17 03:29:37,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:37,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:37,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:29:37,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 161773708, now seen corresponding path program 1 times [2021-12-17 03:29:37,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860167164] [2021-12-17 03:29:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:37,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:37,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:37,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860167164] [2021-12-17 03:29:37,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860167164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:37,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:37,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:37,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774953996] [2021-12-17 03:29:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:37,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:37,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:37,664 INFO L87 Difference]: Start difference. First operand 6984 states and 8882 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:38,315 INFO L93 Difference]: Finished difference Result 20092 states and 25478 transitions. [2021-12-17 03:29:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 264 [2021-12-17 03:29:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:38,340 INFO L225 Difference]: With dead ends: 20092 [2021-12-17 03:29:38,340 INFO L226 Difference]: Without dead ends: 13110 [2021-12-17 03:29:38,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:38,350 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 163 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:38,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 158 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13110 states. [2021-12-17 03:29:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13110 to 13103. [2021-12-17 03:29:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13103 states, 13102 states have (on average 1.2324835902915585) internal successors, (16148), 13102 states have internal predecessors, (16148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13103 states to 13103 states and 16148 transitions. [2021-12-17 03:29:38,583 INFO L78 Accepts]: Start accepts. Automaton has 13103 states and 16148 transitions. Word has length 264 [2021-12-17 03:29:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 13103 states and 16148 transitions. [2021-12-17 03:29:38,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13103 states and 16148 transitions. [2021-12-17 03:29:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-17 03:29:38,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:38,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:38,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:29:38,597 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 317786976, now seen corresponding path program 1 times [2021-12-17 03:29:38,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:38,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085555557] [2021-12-17 03:29:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:38,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:29:38,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:38,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085555557] [2021-12-17 03:29:38,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085555557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:38,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:38,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:38,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335457279] [2021-12-17 03:29:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:38,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:38,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:38,694 INFO L87 Difference]: Start difference. First operand 13103 states and 16148 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:39,373 INFO L93 Difference]: Finished difference Result 32315 states and 39712 transitions. [2021-12-17 03:29:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 275 [2021-12-17 03:29:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:39,406 INFO L225 Difference]: With dead ends: 32315 [2021-12-17 03:29:39,406 INFO L226 Difference]: Without dead ends: 19214 [2021-12-17 03:29:39,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:39,422 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 147 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:39,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 321 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19214 states. [2021-12-17 03:29:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19214 to 19195. [2021-12-17 03:29:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19195 states, 19194 states have (on average 1.1994373241638012) internal successors, (23022), 19194 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19195 states to 19195 states and 23022 transitions. [2021-12-17 03:29:39,710 INFO L78 Accepts]: Start accepts. Automaton has 19195 states and 23022 transitions. Word has length 275 [2021-12-17 03:29:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:39,710 INFO L470 AbstractCegarLoop]: Abstraction has 19195 states and 23022 transitions. [2021-12-17 03:29:39,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 19195 states and 23022 transitions. [2021-12-17 03:29:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-17 03:29:39,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:39,727 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:39,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:29:39,727 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 165507162, now seen corresponding path program 1 times [2021-12-17 03:29:39,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273895533] [2021-12-17 03:29:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:39,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 03:29:39,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273895533] [2021-12-17 03:29:39,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273895533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:39,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:39,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:39,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915910571] [2021-12-17 03:29:39,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:39,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:39,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:39,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:39,818 INFO L87 Difference]: Start difference. First operand 19195 states and 23022 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:40,610 INFO L93 Difference]: Finished difference Result 46544 states and 56169 transitions. [2021-12-17 03:29:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 287 [2021-12-17 03:29:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:40,661 INFO L225 Difference]: With dead ends: 46544 [2021-12-17 03:29:40,661 INFO L226 Difference]: Without dead ends: 27351 [2021-12-17 03:29:40,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:40,683 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:40,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 178 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:29:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27351 states. [2021-12-17 03:29:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27351 to 24484. [2021-12-17 03:29:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24484 states, 24483 states have (on average 1.2226442837887515) internal successors, (29934), 24483 states have internal predecessors, (29934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24484 states to 24484 states and 29934 transitions. [2021-12-17 03:29:41,160 INFO L78 Accepts]: Start accepts. Automaton has 24484 states and 29934 transitions. Word has length 287 [2021-12-17 03:29:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:41,160 INFO L470 AbstractCegarLoop]: Abstraction has 24484 states and 29934 transitions. [2021-12-17 03:29:41,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 24484 states and 29934 transitions. [2021-12-17 03:29:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-12-17 03:29:41,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:41,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:41,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:29:41,179 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:41,180 INFO L85 PathProgramCache]: Analyzing trace with hash -20114843, now seen corresponding path program 1 times [2021-12-17 03:29:41,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:41,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514846674] [2021-12-17 03:29:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:41,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:41,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:41,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514846674] [2021-12-17 03:29:41,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514846674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:41,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:41,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:41,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707847260] [2021-12-17 03:29:41,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:41,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:29:41,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:29:41,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:29:41,296 INFO L87 Difference]: Start difference. First operand 24484 states and 29934 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:42,402 INFO L93 Difference]: Finished difference Result 50620 states and 62056 transitions. [2021-12-17 03:29:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:29:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 291 [2021-12-17 03:29:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:42,445 INFO L225 Difference]: With dead ends: 50620 [2021-12-17 03:29:42,446 INFO L226 Difference]: Without dead ends: 26544 [2021-12-17 03:29:42,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:29:42,470 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 368 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:42,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 76 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:29:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26544 states. [2021-12-17 03:29:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26544 to 24890. [2021-12-17 03:29:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24890 states, 24889 states have (on average 1.227168628711479) internal successors, (30543), 24889 states have internal predecessors, (30543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24890 states to 24890 states and 30543 transitions. [2021-12-17 03:29:42,944 INFO L78 Accepts]: Start accepts. Automaton has 24890 states and 30543 transitions. Word has length 291 [2021-12-17 03:29:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:42,945 INFO L470 AbstractCegarLoop]: Abstraction has 24890 states and 30543 transitions. [2021-12-17 03:29:42,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24890 states and 30543 transitions. [2021-12-17 03:29:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-17 03:29:42,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:42,965 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:42,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:29:42,966 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:42,966 INFO L85 PathProgramCache]: Analyzing trace with hash -716732833, now seen corresponding path program 1 times [2021-12-17 03:29:42,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:42,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500082330] [2021-12-17 03:29:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:42,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 03:29:43,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:43,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500082330] [2021-12-17 03:29:43,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500082330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:43,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:43,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:29:43,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686596464] [2021-12-17 03:29:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:43,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:29:43,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:29:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:29:43,122 INFO L87 Difference]: Start difference. First operand 24890 states and 30543 transitions. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:44,125 INFO L93 Difference]: Finished difference Result 66215 states and 80951 transitions. [2021-12-17 03:29:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:29:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 300 [2021-12-17 03:29:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:44,187 INFO L225 Difference]: With dead ends: 66215 [2021-12-17 03:29:44,188 INFO L226 Difference]: Without dead ends: 41733 [2021-12-17 03:29:44,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:29:44,213 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 431 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:44,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 54 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:29:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41733 states. [2021-12-17 03:29:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41733 to 41124. [2021-12-17 03:29:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41124 states, 41123 states have (on average 1.1617586265593463) internal successors, (47775), 41123 states have internal predecessors, (47775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41124 states to 41124 states and 47775 transitions. [2021-12-17 03:29:44,732 INFO L78 Accepts]: Start accepts. Automaton has 41124 states and 47775 transitions. Word has length 300 [2021-12-17 03:29:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:44,733 INFO L470 AbstractCegarLoop]: Abstraction has 41124 states and 47775 transitions. [2021-12-17 03:29:44,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 41124 states and 47775 transitions. [2021-12-17 03:29:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-17 03:29:44,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:44,756 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:44,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:29:44,757 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2117292182, now seen corresponding path program 1 times [2021-12-17 03:29:44,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:44,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548106512] [2021-12-17 03:29:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:44,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 78 proven. 12 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-17 03:29:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:44,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548106512] [2021-12-17 03:29:44,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548106512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:44,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463740725] [2021-12-17 03:29:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:44,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:44,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:29:44,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:29:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:45,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:45,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-17 03:29:45,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:45,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463740725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:45,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:45,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:29:45,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138775164] [2021-12-17 03:29:45,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:45,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:45,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:45,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:45,424 INFO L87 Difference]: Start difference. First operand 41124 states and 47775 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:46,048 INFO L93 Difference]: Finished difference Result 116024 states and 135087 transitions. [2021-12-17 03:29:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 312 [2021-12-17 03:29:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:46,146 INFO L225 Difference]: With dead ends: 116024 [2021-12-17 03:29:46,146 INFO L226 Difference]: Without dead ends: 75309 [2021-12-17 03:29:46,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:46,192 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 224 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:46,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 807 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:29:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75309 states. [2021-12-17 03:29:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75309 to 75303. [2021-12-17 03:29:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75303 states, 75302 states have (on average 1.1490531459987783) internal successors, (86526), 75302 states have internal predecessors, (86526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75303 states to 75303 states and 86526 transitions. [2021-12-17 03:29:47,364 INFO L78 Accepts]: Start accepts. Automaton has 75303 states and 86526 transitions. Word has length 312 [2021-12-17 03:29:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:47,364 INFO L470 AbstractCegarLoop]: Abstraction has 75303 states and 86526 transitions. [2021-12-17 03:29:47,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 75303 states and 86526 transitions. [2021-12-17 03:29:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-17 03:29:47,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:47,394 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:47,414 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 03:29:47,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:47,603 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash 757238211, now seen corresponding path program 1 times [2021-12-17 03:29:47,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:47,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922726454] [2021-12-17 03:29:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:47,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-17 03:29:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922726454] [2021-12-17 03:29:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922726454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:47,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:47,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567259406] [2021-12-17 03:29:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:47,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:47,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:47,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:47,795 INFO L87 Difference]: Start difference. First operand 75303 states and 86526 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:49,023 INFO L93 Difference]: Finished difference Result 176854 states and 202935 transitions. [2021-12-17 03:29:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 313 [2021-12-17 03:29:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:49,144 INFO L225 Difference]: With dead ends: 176854 [2021-12-17 03:29:49,144 INFO L226 Difference]: Without dead ends: 101960 [2021-12-17 03:29:49,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:49,181 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:49,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 124 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:29:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101960 states. [2021-12-17 03:29:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101960 to 99291. [2021-12-17 03:29:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99291 states, 99290 states have (on average 1.1366099305065969) internal successors, (112854), 99290 states have internal predecessors, (112854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99291 states to 99291 states and 112854 transitions. [2021-12-17 03:29:50,418 INFO L78 Accepts]: Start accepts. Automaton has 99291 states and 112854 transitions. Word has length 313 [2021-12-17 03:29:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:50,418 INFO L470 AbstractCegarLoop]: Abstraction has 99291 states and 112854 transitions. [2021-12-17 03:29:50,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 99291 states and 112854 transitions. [2021-12-17 03:29:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-17 03:29:50,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:50,450 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:50,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:29:50,450 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash 427254838, now seen corresponding path program 1 times [2021-12-17 03:29:50,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:50,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346439395] [2021-12-17 03:29:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:50,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 128 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 03:29:50,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346439395] [2021-12-17 03:29:50,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346439395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337723044] [2021-12-17 03:29:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:50,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:50,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:50,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:29:50,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:29:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 03:29:51,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:51,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337723044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:51,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:51,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:29:51,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070398029] [2021-12-17 03:29:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:51,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:51,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:51,473 INFO L87 Difference]: Start difference. First operand 99291 states and 112854 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:52,626 INFO L93 Difference]: Finished difference Result 196344 states and 223040 transitions. [2021-12-17 03:29:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 314 [2021-12-17 03:29:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:52,737 INFO L225 Difference]: With dead ends: 196344 [2021-12-17 03:29:52,738 INFO L226 Difference]: Without dead ends: 97462 [2021-12-17 03:29:52,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:29:52,765 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 223 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:52,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 91 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:29:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97462 states. [2021-12-17 03:29:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97462 to 97462. [2021-12-17 03:29:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97462 states, 97461 states have (on average 1.116887780753327) internal successors, (108853), 97461 states have internal predecessors, (108853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97462 states to 97462 states and 108853 transitions. [2021-12-17 03:29:53,918 INFO L78 Accepts]: Start accepts. Automaton has 97462 states and 108853 transitions. Word has length 314 [2021-12-17 03:29:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:53,919 INFO L470 AbstractCegarLoop]: Abstraction has 97462 states and 108853 transitions. [2021-12-17 03:29:53,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 97462 states and 108853 transitions. [2021-12-17 03:29:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-17 03:29:53,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:53,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:53,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:54,175 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,SelfDestructingSolverStorable14 [2021-12-17 03:29:54,176 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 621527808, now seen corresponding path program 1 times [2021-12-17 03:29:54,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:54,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098671814] [2021-12-17 03:29:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:54,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 140 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:29:54,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098671814] [2021-12-17 03:29:54,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098671814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:29:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590929954] [2021-12-17 03:29:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:54,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:29:54,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:29:54,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:29:54,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:29:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:29:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:29:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-17 03:29:55,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:29:55,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590929954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:55,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:29:55,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 03:29:55,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693316638] [2021-12-17 03:29:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:55,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:55,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:29:55,188 INFO L87 Difference]: Start difference. First operand 97462 states and 108853 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:29:56,476 INFO L93 Difference]: Finished difference Result 247805 states and 276822 transitions. [2021-12-17 03:29:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:29:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 333 [2021-12-17 03:29:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:29:56,644 INFO L225 Difference]: With dead ends: 247805 [2021-12-17 03:29:56,644 INFO L226 Difference]: Without dead ends: 150752 [2021-12-17 03:29:57,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:29:57,035 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 69 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:29:57,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 117 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:29:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150752 states. [2021-12-17 03:29:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150752 to 149104. [2021-12-17 03:29:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149104 states, 149103 states have (on average 1.104598834362823) internal successors, (164699), 149103 states have internal predecessors, (164699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149104 states to 149104 states and 164699 transitions. [2021-12-17 03:29:58,767 INFO L78 Accepts]: Start accepts. Automaton has 149104 states and 164699 transitions. Word has length 333 [2021-12-17 03:29:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:29:58,767 INFO L470 AbstractCegarLoop]: Abstraction has 149104 states and 164699 transitions. [2021-12-17 03:29:58,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:29:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 149104 states and 164699 transitions. [2021-12-17 03:29:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-17 03:29:58,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:29:58,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:29:58,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:29:59,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 03:29:59,052 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:29:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:29:59,053 INFO L85 PathProgramCache]: Analyzing trace with hash -921620211, now seen corresponding path program 1 times [2021-12-17 03:29:59,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:29:59,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114836065] [2021-12-17 03:29:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:29:59,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:29:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:29:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-12-17 03:29:59,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:29:59,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114836065] [2021-12-17 03:29:59,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114836065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:29:59,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:29:59,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:29:59,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615621106] [2021-12-17 03:29:59,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:29:59,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:29:59,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:29:59,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:29:59,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:29:59,174 INFO L87 Difference]: Start difference. First operand 149104 states and 164699 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:00,590 INFO L93 Difference]: Finished difference Result 297799 states and 328962 transitions. [2021-12-17 03:30:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 444 [2021-12-17 03:30:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:00,762 INFO L225 Difference]: With dead ends: 297799 [2021-12-17 03:30:00,762 INFO L226 Difference]: Without dead ends: 149104 [2021-12-17 03:30:00,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:00,846 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:00,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 160 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149104 states. [2021-12-17 03:30:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149104 to 149104. [2021-12-17 03:30:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149104 states, 149103 states have (on average 1.1045921275896529) internal successors, (164698), 149103 states have internal predecessors, (164698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149104 states to 149104 states and 164698 transitions. [2021-12-17 03:30:02,754 INFO L78 Accepts]: Start accepts. Automaton has 149104 states and 164698 transitions. Word has length 444 [2021-12-17 03:30:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:02,755 INFO L470 AbstractCegarLoop]: Abstraction has 149104 states and 164698 transitions. [2021-12-17 03:30:02,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 149104 states and 164698 transitions. [2021-12-17 03:30:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-17 03:30:02,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:02,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:02,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:30:02,822 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:02,823 INFO L85 PathProgramCache]: Analyzing trace with hash 49532877, now seen corresponding path program 2 times [2021-12-17 03:30:02,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:02,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444795987] [2021-12-17 03:30:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:02,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:30:03,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:03,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444795987] [2021-12-17 03:30:03,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444795987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:03,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:03,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:30:03,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419651612] [2021-12-17 03:30:03,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:03,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:03,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:03,424 INFO L87 Difference]: Start difference. First operand 149104 states and 164698 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:04,645 INFO L93 Difference]: Finished difference Result 271363 states and 299450 transitions. [2021-12-17 03:30:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:04,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 444 [2021-12-17 03:30:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:04,792 INFO L225 Difference]: With dead ends: 271363 [2021-12-17 03:30:04,792 INFO L226 Difference]: Without dead ends: 122668 [2021-12-17 03:30:04,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:04,881 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 218 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:04,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 329 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:30:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122668 states. [2021-12-17 03:30:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122668 to 121834. [2021-12-17 03:30:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121834 states, 121833 states have (on average 1.0893928574359986) internal successors, (132724), 121833 states have internal predecessors, (132724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121834 states to 121834 states and 132724 transitions. [2021-12-17 03:30:06,741 INFO L78 Accepts]: Start accepts. Automaton has 121834 states and 132724 transitions. Word has length 444 [2021-12-17 03:30:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 121834 states and 132724 transitions. [2021-12-17 03:30:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 121834 states and 132724 transitions. [2021-12-17 03:30:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-12-17 03:30:06,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:06,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:06,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:30:06,799 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash 623806828, now seen corresponding path program 1 times [2021-12-17 03:30:06,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:06,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531117607] [2021-12-17 03:30:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:06,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 332 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:07,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531117607] [2021-12-17 03:30:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531117607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367953976] [2021-12-17 03:30:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:07,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:07,048 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:07,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:30:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 03:30:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-17 03:30:09,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:30:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-17 03:30:11,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367953976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:30:11,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:30:11,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2021-12-17 03:30:11,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056872285] [2021-12-17 03:30:11,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:30:11,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:30:11,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:30:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:30:11,295 INFO L87 Difference]: Start difference. First operand 121834 states and 132724 transitions. Second operand has 7 states, 7 states have (on average 112.85714285714286) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:15,668 INFO L93 Difference]: Finished difference Result 453749 states and 495858 transitions. [2021-12-17 03:30:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 03:30:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 112.85714285714286) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 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 466 [2021-12-17 03:30:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:16,175 INFO L225 Difference]: With dead ends: 453749 [2021-12-17 03:30:16,175 INFO L226 Difference]: Without dead ends: 332324 [2021-12-17 03:30:16,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 928 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:30:16,297 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1654 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:16,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 247 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 2924 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 03:30:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332324 states. [2021-12-17 03:30:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332324 to 256075. [2021-12-17 03:30:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256075 states, 256074 states have (on average 1.0882830744237995) internal successors, (278681), 256074 states have internal predecessors, (278681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256075 states to 256075 states and 278681 transitions. [2021-12-17 03:30:20,254 INFO L78 Accepts]: Start accepts. Automaton has 256075 states and 278681 transitions. Word has length 466 [2021-12-17 03:30:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:20,254 INFO L470 AbstractCegarLoop]: Abstraction has 256075 states and 278681 transitions. [2021-12-17 03:30:20,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.85714285714286) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 256075 states and 278681 transitions. [2021-12-17 03:30:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-12-17 03:30:20,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:20,435 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:20,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 03:30:20,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:20,637 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash 763794460, now seen corresponding path program 1 times [2021-12-17 03:30:20,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:20,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563179727] [2021-12-17 03:30:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:20,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-12-17 03:30:20,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:20,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563179727] [2021-12-17 03:30:20,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563179727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:20,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:20,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:20,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949649955] [2021-12-17 03:30:20,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:20,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:20,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:20,848 INFO L87 Difference]: Start difference. First operand 256075 states and 278681 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:23,728 INFO L93 Difference]: Finished difference Result 551624 states and 600163 transitions. [2021-12-17 03:30:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 526 [2021-12-17 03:30:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:24,098 INFO L225 Difference]: With dead ends: 551624 [2021-12-17 03:30:24,098 INFO L226 Difference]: Without dead ends: 296161 [2021-12-17 03:30:24,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:24,179 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 91 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:24,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:30:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296161 states.