./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label33.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/Problem17_label33.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 f1d6c7224567b6057eecb8e0076a48aebc20a409238cb7be9c0543149a96c59f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:03:49,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:03:49,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:03:49,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:03:49,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:03:49,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:03:49,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:03:49,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:03:49,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:03:49,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:03:49,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:03:49,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:03:49,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:03:49,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:03:49,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:03:49,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:03:49,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:03:49,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:03:49,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:03:49,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:03:49,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:03:49,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:03:49,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:03:49,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:03:49,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:03:49,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:03:49,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:03:49,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:03:49,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:03:49,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:03:49,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:03:49,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:03:49,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:03:49,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:03:49,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:03:49,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:03:49,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:03:49,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:03:49,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:03:49,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:03:49,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:03:49,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:03:49,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:03:49,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:03:49,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:03:49,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:03:49,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:03:49,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:03:49,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:03:49,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:03:49,425 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:03:49,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:03:49,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:03:49,426 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:03:49,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:03:49,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:03:49,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:03:49,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:03:49,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:03:49,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:03:49,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:03:49,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:03:49,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:03:49,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:03:49,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:03:49,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:03:49,429 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:03:49,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:03:49,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:03:49,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:03:49,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1d6c7224567b6057eecb8e0076a48aebc20a409238cb7be9c0543149a96c59f [2021-12-17 05:03:49,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:03:49,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:03:49,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:03:49,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:03:49,651 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:03:49,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label33.c [2021-12-17 05:03:49,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/699e03061/0a0086580653409ebd35e7bbfc83a59d/FLAG0184c6d56 [2021-12-17 05:03:50,172 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:03:50,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label33.c [2021-12-17 05:03:50,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/699e03061/0a0086580653409ebd35e7bbfc83a59d/FLAG0184c6d56 [2021-12-17 05:03:50,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/699e03061/0a0086580653409ebd35e7bbfc83a59d [2021-12-17 05:03:50,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:03:50,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:03:50,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:03:50,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:03:50,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:03:50,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:03:50" (1/1) ... [2021-12-17 05:03:50,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dbe685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:50, skipping insertion in model container [2021-12-17 05:03:50,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:03:50" (1/1) ... [2021-12-17 05:03:50,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:03:50,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:03:50,759 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/Problem17_label33.c[2518,2531] [2021-12-17 05:03:51,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:03:51,244 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:03:51,263 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/Problem17_label33.c[2518,2531] [2021-12-17 05:03:51,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:03:51,444 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:03:51,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51 WrapperNode [2021-12-17 05:03:51,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:03:51,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:03:51,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:03:51,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:03:51,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,655 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-17 05:03:51,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:03:51,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:03:51,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:03:51,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:03:51,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:03:51,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:03:51,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:03:51,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:03:51,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (1/1) ... [2021-12-17 05:03:51,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:03:51,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:03:51,963 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 05:03:51,993 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 05:03:52,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:03:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:03:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:03:52,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:03:52,050 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:03:52,051 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:03:54,353 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:03:54,361 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:03:54,361 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:03:54,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:03:54 BoogieIcfgContainer [2021-12-17 05:03:54,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:03:54,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:03:54,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:03:54,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:03:54,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:03:50" (1/3) ... [2021-12-17 05:03:54,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5181bf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:03:54, skipping insertion in model container [2021-12-17 05:03:54,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:03:51" (2/3) ... [2021-12-17 05:03:54,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5181bf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:03:54, skipping insertion in model container [2021-12-17 05:03:54,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:03:54" (3/3) ... [2021-12-17 05:03:54,368 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label33.c [2021-12-17 05:03:54,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:03:54,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:03:54,402 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:03:54,406 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 05:03:54,406 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:03:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 05:03:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 05:03:54,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:03:54,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:03:54,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:03:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:03:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2021-12-17 05:03:54,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:03:54,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134914286] [2021-12-17 05:03:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:03:54,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:03:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:03:54,533 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 05:03:54,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:03:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134914286] [2021-12-17 05:03:54,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134914286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:03:54,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:03:54,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:03:54,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524439191] [2021-12-17 05:03:54,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:03:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:03:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:03:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:03:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:03:54,556 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:03:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:03:56,407 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-17 05:03:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:03:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 05:03:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:03:56,444 INFO L225 Difference]: With dead ends: 1667 [2021-12-17 05:03:56,445 INFO L226 Difference]: Without dead ends: 998 [2021-12-17 05:03:56,452 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 05:03:56,456 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 529 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:03:56,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 05:03:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-17 05:03:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-17 05:03:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states 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 05:03:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-17 05:03:56,586 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 16 [2021-12-17 05:03:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:03:56,587 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-17 05:03:56,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:03:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-17 05:03:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 05:03:56,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:03:56,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:03:56,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:03:56,591 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:03:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:03:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 38833391, now seen corresponding path program 1 times [2021-12-17 05:03:56,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:03:56,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021357517] [2021-12-17 05:03:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:03:56,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:03:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:03:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:03:56,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:03:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021357517] [2021-12-17 05:03:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021357517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:03:56,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:03:56,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:03:56,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631955839] [2021-12-17 05:03:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:03:56,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:03:56,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:03:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:03:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:03:56,818 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 05:03:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:03:58,630 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-12-17 05:03:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:03:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-17 05:03:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:03:58,637 INFO L225 Difference]: With dead ends: 2841 [2021-12-17 05:03:58,637 INFO L226 Difference]: Without dead ends: 1861 [2021-12-17 05:03:58,638 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 05:03:58,641 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:03:58,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 05:03:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-17 05:03:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-12-17 05:03:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states 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 05:03:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-12-17 05:03:58,670 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 81 [2021-12-17 05:03:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:03:58,672 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-12-17 05:03:58,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 05:03:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-12-17 05:03:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 05:03:58,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:03:58,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:03:58,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:03:58,681 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:03:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:03:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1101270044, now seen corresponding path program 1 times [2021-12-17 05:03:58,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:03:58,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757771777] [2021-12-17 05:03:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:03:58,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:03:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:03:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:03:58,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:03:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757771777] [2021-12-17 05:03:58,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757771777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:03:58,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:03:58,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:03:58,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411165586] [2021-12-17 05:03:58,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:03:58,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:03:58,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:03:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:03:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:03:58,826 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 05:04:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:00,985 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-12-17 05:04:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-17 05:04:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:00,996 INFO L225 Difference]: With dead ends: 4591 [2021-12-17 05:04:00,996 INFO L226 Difference]: Without dead ends: 2736 [2021-12-17 05:04:00,998 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 05:04:01,003 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:01,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 05:04:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-12-17 05:04:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-12-17 05:04:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states 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 05:04:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-12-17 05:04:01,036 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 121 [2021-12-17 05:04:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-12-17 05:04:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 05:04:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-12-17 05:04:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 05:04:01,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:01,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:01,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:04:01,044 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash 582217397, now seen corresponding path program 1 times [2021-12-17 05:04:01,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169192151] [2021-12-17 05:04:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:01,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:04:01,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169192151] [2021-12-17 05:04:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169192151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:01,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:01,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:01,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725419453] [2021-12-17 05:04:01,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:01,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:04:01,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:04:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:04:01,207 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 05:04:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:02,969 INFO L93 Difference]: Finished difference Result 5012 states and 6951 transitions. [2021-12-17 05:04:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 05:04:02,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-17 05:04:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:02,976 INFO L225 Difference]: With dead ends: 5012 [2021-12-17 05:04:02,976 INFO L226 Difference]: Without dead ends: 2298 [2021-12-17 05:04:02,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:04:02,980 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:02,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 05:04:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-12-17 05:04:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-12-17 05:04:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.3726435773783427) internal successors, (3131), 2281 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states 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 05:04:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3131 transitions. [2021-12-17 05:04:03,003 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3131 transitions. Word has length 127 [2021-12-17 05:04:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:03,003 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3131 transitions. [2021-12-17 05:04:03,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 05:04:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3131 transitions. [2021-12-17 05:04:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 05:04:03,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:03,005 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:04:03,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:04:03,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash 242275523, now seen corresponding path program 1 times [2021-12-17 05:04:03,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104485233] [2021-12-17 05:04:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:03,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 05:04:03,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:03,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104485233] [2021-12-17 05:04:03,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104485233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:03,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102173596] [2021-12-17 05:04:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:03,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:04:03,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:04:03,116 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 05:04:03,181 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 05:04:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:04:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:04:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 05:04:03,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:04:03,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102173596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:03,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:04:03,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-17 05:04:03,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810792651] [2021-12-17 05:04:03,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:03,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:03,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:03,525 INFO L87 Difference]: Start difference. First operand 2282 states and 3131 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 05:04:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:05,346 INFO L93 Difference]: Finished difference Result 5850 states and 8323 transitions. [2021-12-17 05:04:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 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 151 [2021-12-17 05:04:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:05,360 INFO L225 Difference]: With dead ends: 5850 [2021-12-17 05:04:05,360 INFO L226 Difference]: Without dead ends: 3995 [2021-12-17 05:04:05,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:05,380 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:05,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 05:04:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-12-17 05:04:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-12-17 05:04:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states 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 05:04:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-12-17 05:04:05,465 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 151 [2021-12-17 05:04:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:05,469 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-12-17 05:04:05,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 05:04:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-12-17 05:04:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 05:04:05,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:05,471 INFO L514 BasicCegarLoop]: trace histogram [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, 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 05:04:05,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 05:04:05,690 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 05:04:05,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1582736769, now seen corresponding path program 1 times [2021-12-17 05:04:05,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:05,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330790031] [2021-12-17 05:04:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:05,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:04:05,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:05,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330790031] [2021-12-17 05:04:05,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330790031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:05,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:05,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 05:04:05,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45931258] [2021-12-17 05:04:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:05,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 05:04:05,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 05:04:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:04:05,757 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 05:04:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:07,908 INFO L93 Difference]: Finished difference Result 8024 states and 10527 transitions. [2021-12-17 05:04:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 05:04:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-12-17 05:04:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:07,920 INFO L225 Difference]: With dead ends: 8024 [2021-12-17 05:04:07,920 INFO L226 Difference]: Without dead ends: 4884 [2021-12-17 05:04:07,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:07,924 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1190 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1099 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1099 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:07,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 858 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1099 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 05:04:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-12-17 05:04:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4852. [2021-12-17 05:04:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states 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 05:04:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-12-17 05:04:07,982 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 164 [2021-12-17 05:04:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:07,982 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-12-17 05:04:07,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 05:04:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-12-17 05:04:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 05:04:07,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:07,984 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:04:07,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:04:07,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -387388432, now seen corresponding path program 1 times [2021-12-17 05:04:07,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:07,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578661674] [2021-12-17 05:04:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:07,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 05:04:08,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578661674] [2021-12-17 05:04:08,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578661674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:08,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:08,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:08,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248068503] [2021-12-17 05:04:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:08,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:08,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:08,039 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 05:04:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:09,987 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-12-17 05:04:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:09,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 170 [2021-12-17 05:04:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:10,004 INFO L225 Difference]: With dead ends: 12249 [2021-12-17 05:04:10,004 INFO L226 Difference]: Without dead ends: 7399 [2021-12-17 05:04:10,010 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 05:04:10,011 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 432 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:10,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 05:04:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-12-17 05:04:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-12-17 05:04:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states 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 05:04:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-12-17 05:04:10,132 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 170 [2021-12-17 05:04:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:10,134 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-12-17 05:04:10,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 05:04:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-12-17 05:04:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-17 05:04:10,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:10,136 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 05:04:10,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:04:10,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash 591527748, now seen corresponding path program 1 times [2021-12-17 05:04:10,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:10,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566731087] [2021-12-17 05:04:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:10,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 05:04:10,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566731087] [2021-12-17 05:04:10,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566731087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:10,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:10,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:10,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114404714] [2021-12-17 05:04:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:10,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:10,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:10,207 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 05:04:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:11,792 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2021-12-17 05:04:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:11,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 183 [2021-12-17 05:04:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:11,817 INFO L225 Difference]: With dead ends: 13481 [2021-12-17 05:04:11,818 INFO L226 Difference]: Without dead ends: 8657 [2021-12-17 05:04:11,824 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 05:04:11,825 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 468 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:11,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 05:04:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2021-12-17 05:04:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2021-12-17 05:04:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states 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 05:04:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2021-12-17 05:04:11,972 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 183 [2021-12-17 05:04:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:11,973 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2021-12-17 05:04:11,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 05:04:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2021-12-17 05:04:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-17 05:04:11,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:11,976 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 05:04:11,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 05:04:11,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1880356032, now seen corresponding path program 1 times [2021-12-17 05:04:11,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:11,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968100984] [2021-12-17 05:04:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:11,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:04:12,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968100984] [2021-12-17 05:04:12,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968100984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:12,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:12,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:12,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283739843] [2021-12-17 05:04:12,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:12,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:12,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:12,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:12,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:12,097 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 05:04:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:13,837 INFO L93 Difference]: Finished difference Result 19035 states and 23868 transitions. [2021-12-17 05:04:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-12-17 05:04:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:13,852 INFO L225 Difference]: With dead ends: 19035 [2021-12-17 05:04:13,852 INFO L226 Difference]: Without dead ends: 10807 [2021-12-17 05:04:13,859 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 05:04:13,861 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 370 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:13,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 896 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 05:04:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10807 states. [2021-12-17 05:04:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10807 to 10799. [2021-12-17 05:04:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10799 states, 10798 states have (on average 1.1793850713095018) internal successors, (12735), 10798 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states 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 05:04:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10799 states to 10799 states and 12735 transitions. [2021-12-17 05:04:14,013 INFO L78 Accepts]: Start accepts. Automaton has 10799 states and 12735 transitions. Word has length 232 [2021-12-17 05:04:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:14,013 INFO L470 AbstractCegarLoop]: Abstraction has 10799 states and 12735 transitions. [2021-12-17 05:04:14,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 05:04:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10799 states and 12735 transitions. [2021-12-17 05:04:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-17 05:04:14,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:14,016 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:04:14,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:04:14,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -18097380, now seen corresponding path program 1 times [2021-12-17 05:04:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435192522] [2021-12-17 05:04:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:14,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:14,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435192522] [2021-12-17 05:04:14,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435192522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734494059] [2021-12-17 05:04:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:14,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:04:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:04:14,116 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 05:04:14,117 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 05:04:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 05:04:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:04:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:14,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:04:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:15,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734494059] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:15,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:04:15,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-17 05:04:15,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383673638] [2021-12-17 05:04:15,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:15,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:04:15,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:04:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:15,204 INFO L87 Difference]: Start difference. First operand 10799 states and 12735 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 05:04:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:18,061 INFO L93 Difference]: Finished difference Result 35677 states and 42172 transitions. [2021-12-17 05:04:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:04:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 240 [2021-12-17 05:04:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:18,088 INFO L225 Difference]: With dead ends: 35677 [2021-12-17 05:04:18,088 INFO L226 Difference]: Without dead ends: 24019 [2021-12-17 05:04:18,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 475 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:18,095 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 889 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:18,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 159 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 05:04:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24019 states. [2021-12-17 05:04:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24019 to 22742. [2021-12-17 05:04:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22742 states, 22741 states have (on average 1.1553141902291015) internal successors, (26273), 22741 states have internal predecessors, (26273), 0 states have call successors, (0), 0 states 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 05:04:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22742 states to 22742 states and 26273 transitions. [2021-12-17 05:04:18,316 INFO L78 Accepts]: Start accepts. Automaton has 22742 states and 26273 transitions. Word has length 240 [2021-12-17 05:04:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:18,316 INFO L470 AbstractCegarLoop]: Abstraction has 22742 states and 26273 transitions. [2021-12-17 05:04:18,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 05:04:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 22742 states and 26273 transitions. [2021-12-17 05:04:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-17 05:04:18,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:18,319 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:04:18,348 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 05:04:18,548 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,SelfDestructingSolverStorable9 [2021-12-17 05:04:18,549 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1861634320, now seen corresponding path program 1 times [2021-12-17 05:04:18,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:18,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692663592] [2021-12-17 05:04:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:18,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 05:04:18,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:18,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692663592] [2021-12-17 05:04:18,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692663592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:18,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:18,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:18,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470487052] [2021-12-17 05:04:18,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:18,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:18,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:18,617 INFO L87 Difference]: Start difference. First operand 22742 states and 26273 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 05:04:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:20,205 INFO L93 Difference]: Finished difference Result 50583 states and 58592 transitions. [2021-12-17 05:04:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 253 [2021-12-17 05:04:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:20,244 INFO L225 Difference]: With dead ends: 50583 [2021-12-17 05:04:20,245 INFO L226 Difference]: Without dead ends: 27416 [2021-12-17 05:04:20,265 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 05:04:20,266 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 378 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:20,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 842 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 05:04:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27416 states. [2021-12-17 05:04:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27416 to 27416. [2021-12-17 05:04:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27416 states, 27415 states have (on average 1.1312055444099944) internal successors, (31012), 27415 states have internal predecessors, (31012), 0 states have call successors, (0), 0 states 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 05:04:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27416 states to 27416 states and 31012 transitions. [2021-12-17 05:04:20,671 INFO L78 Accepts]: Start accepts. Automaton has 27416 states and 31012 transitions. Word has length 253 [2021-12-17 05:04:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:20,671 INFO L470 AbstractCegarLoop]: Abstraction has 27416 states and 31012 transitions. [2021-12-17 05:04:20,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 05:04:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27416 states and 31012 transitions. [2021-12-17 05:04:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-17 05:04:20,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:20,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-17 05:04:20,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 05:04:20,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1700470054, now seen corresponding path program 1 times [2021-12-17 05:04:20,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448768073] [2021-12-17 05:04:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:20,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:20,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:20,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448768073] [2021-12-17 05:04:20,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448768073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:20,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720214094] [2021-12-17 05:04:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:20,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:04:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:04:20,763 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 05:04:20,791 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 05:04:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 05:04:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:04:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:21,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:04:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:22,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720214094] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:22,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:04:22,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-17 05:04:22,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053508769] [2021-12-17 05:04:22,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:22,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:04:22,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:04:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:22,127 INFO L87 Difference]: Start difference. First operand 27416 states and 31012 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 05:04:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:25,197 INFO L93 Difference]: Finished difference Result 68481 states and 77437 transitions. [2021-12-17 05:04:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:04:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 311 [2021-12-17 05:04:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:25,259 INFO L225 Difference]: With dead ends: 68481 [2021-12-17 05:04:25,259 INFO L226 Difference]: Without dead ends: 40640 [2021-12-17 05:04:25,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 617 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:04:25,281 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 875 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:25,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 180 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 05:04:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40640 states. [2021-12-17 05:04:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40640 to 38512. [2021-12-17 05:04:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38512 states, 38511 states have (on average 1.1338578587935915) internal successors, (43666), 38511 states have internal predecessors, (43666), 0 states have call successors, (0), 0 states 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 05:04:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38512 states to 38512 states and 43666 transitions. [2021-12-17 05:04:25,652 INFO L78 Accepts]: Start accepts. Automaton has 38512 states and 43666 transitions. Word has length 311 [2021-12-17 05:04:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:25,653 INFO L470 AbstractCegarLoop]: Abstraction has 38512 states and 43666 transitions. [2021-12-17 05:04:25,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 05:04:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38512 states and 43666 transitions. [2021-12-17 05:04:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-17 05:04:25,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:25,678 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:25,713 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 05:04:25,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:04:25,892 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash 873519532, now seen corresponding path program 1 times [2021-12-17 05:04:25,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:25,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105498186] [2021-12-17 05:04:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:25,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-17 05:04:26,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:26,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105498186] [2021-12-17 05:04:26,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105498186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:26,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:26,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:26,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100208695] [2021-12-17 05:04:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:26,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:26,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:26,017 INFO L87 Difference]: Start difference. First operand 38512 states and 43666 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 05:04:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:27,680 INFO L93 Difference]: Finished difference Result 89785 states and 102267 transitions. [2021-12-17 05:04:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 411 [2021-12-17 05:04:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:27,738 INFO L225 Difference]: With dead ends: 89785 [2021-12-17 05:04:27,739 INFO L226 Difference]: Without dead ends: 49573 [2021-12-17 05:04:27,766 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 05:04:27,767 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 338 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:27,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 787 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 05:04:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49573 states. [2021-12-17 05:04:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49573 to 37619. [2021-12-17 05:04:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37619 states, 37618 states have (on average 1.132729012706683) internal successors, (42611), 37618 states have internal predecessors, (42611), 0 states have call successors, (0), 0 states 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 05:04:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37619 states to 37619 states and 42611 transitions. [2021-12-17 05:04:28,211 INFO L78 Accepts]: Start accepts. Automaton has 37619 states and 42611 transitions. Word has length 411 [2021-12-17 05:04:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:28,211 INFO L470 AbstractCegarLoop]: Abstraction has 37619 states and 42611 transitions. [2021-12-17 05:04:28,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 05:04:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37619 states and 42611 transitions. [2021-12-17 05:04:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-12-17 05:04:28,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:28,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:04:28,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 05:04:28,220 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -826212447, now seen corresponding path program 1 times [2021-12-17 05:04:28,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:28,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052537191] [2021-12-17 05:04:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:28,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-12-17 05:04:28,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:28,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052537191] [2021-12-17 05:04:28,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052537191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:28,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:28,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:28,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071224646] [2021-12-17 05:04:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:28,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:28,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:28,427 INFO L87 Difference]: Start difference. First operand 37619 states and 42611 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 05:04:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:30,292 INFO L93 Difference]: Finished difference Result 87614 states and 98821 transitions. [2021-12-17 05:04:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 412 [2021-12-17 05:04:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:30,351 INFO L225 Difference]: With dead ends: 87614 [2021-12-17 05:04:30,351 INFO L226 Difference]: Without dead ends: 49571 [2021-12-17 05:04:30,378 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 05:04:30,378 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 476 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:30,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 348 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:04:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49571 states. [2021-12-17 05:04:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49571 to 38042. [2021-12-17 05:04:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38042 states, 38041 states have (on average 1.1311216844983045) internal successors, (43029), 38041 states have internal predecessors, (43029), 0 states have call successors, (0), 0 states 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 05:04:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38042 states to 38042 states and 43029 transitions. [2021-12-17 05:04:30,965 INFO L78 Accepts]: Start accepts. Automaton has 38042 states and 43029 transitions. Word has length 412 [2021-12-17 05:04:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:30,966 INFO L470 AbstractCegarLoop]: Abstraction has 38042 states and 43029 transitions. [2021-12-17 05:04:30,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 05:04:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 38042 states and 43029 transitions. [2021-12-17 05:04:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-12-17 05:04:30,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:30,975 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:30,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 05:04:30,976 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:30,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1921236114, now seen corresponding path program 1 times [2021-12-17 05:04:30,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:30,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730921883] [2021-12-17 05:04:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:30,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-17 05:04:31,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730921883] [2021-12-17 05:04:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730921883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:31,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:31,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:04:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338445183] [2021-12-17 05:04:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:31,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:04:31,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:04:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:04:31,092 INFO L87 Difference]: Start difference. First operand 38042 states and 43029 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 05:04:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:33,127 INFO L93 Difference]: Finished difference Result 90134 states and 101693 transitions. [2021-12-17 05:04:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:04:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 439 [2021-12-17 05:04:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:33,221 INFO L225 Difference]: With dead ends: 90134 [2021-12-17 05:04:33,221 INFO L226 Difference]: Without dead ends: 51668 [2021-12-17 05:04:33,249 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 05:04:33,249 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 489 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:33,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 299 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 05:04:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2021-12-17 05:04:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 38441. [2021-12-17 05:04:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38441 states, 38440 states have (on average 1.1205515088449531) internal successors, (43074), 38440 states have internal predecessors, (43074), 0 states have call successors, (0), 0 states 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 05:04:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38441 states to 38441 states and 43074 transitions. [2021-12-17 05:04:33,718 INFO L78 Accepts]: Start accepts. Automaton has 38441 states and 43074 transitions. Word has length 439 [2021-12-17 05:04:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:33,718 INFO L470 AbstractCegarLoop]: Abstraction has 38441 states and 43074 transitions. [2021-12-17 05:04:33,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 05:04:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38441 states and 43074 transitions. [2021-12-17 05:04:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-17 05:04:33,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:33,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 05:04:33,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 05:04:33,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1085398361, now seen corresponding path program 1 times [2021-12-17 05:04:33,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919348267] [2021-12-17 05:04:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:33,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 296 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:04:33,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919348267] [2021-12-17 05:04:33,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919348267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996969169] [2021-12-17 05:04:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:33,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:04:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:04:33,916 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 05:04:34,013 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 05:04:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 05:04:34,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:04:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 214 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:35,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:04:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 214 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:36,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996969169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 05:04:36,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 05:04:36,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-17 05:04:36,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111842219] [2021-12-17 05:04:36,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 05:04:36,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 05:04:36,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 05:04:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 05:04:36,499 INFO L87 Difference]: Start difference. First operand 38441 states and 43074 transitions. Second operand has 9 states, 9 states have (on average 119.66666666666667) internal successors, (1077), 9 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states 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 05:04:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:46,940 INFO L93 Difference]: Finished difference Result 135679 states and 151025 transitions. [2021-12-17 05:04:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 05:04:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 119.66666666666667) internal successors, (1077), 9 states have internal predecessors, (1077), 0 states have call successors, (0), 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 451 [2021-12-17 05:04:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:47,065 INFO L225 Difference]: With dead ends: 135679 [2021-12-17 05:04:47,065 INFO L226 Difference]: Without dead ends: 95537 [2021-12-17 05:04:47,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-12-17 05:04:47,099 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 8449 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12382 mSolverCounterSat, 2343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8449 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 14725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2343 IncrementalHoareTripleChecker+Valid, 12382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:47,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8449 Valid, 428 Invalid, 14725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2343 Valid, 12382 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-12-17 05:04:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95537 states. [2021-12-17 05:04:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95537 to 87867. [2021-12-17 05:04:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87867 states, 87866 states have (on average 1.0985136457787996) internal successors, (96522), 87866 states have internal predecessors, (96522), 0 states have call successors, (0), 0 states 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 05:04:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87867 states to 87867 states and 96522 transitions. [2021-12-17 05:04:48,270 INFO L78 Accepts]: Start accepts. Automaton has 87867 states and 96522 transitions. Word has length 451 [2021-12-17 05:04:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:48,271 INFO L470 AbstractCegarLoop]: Abstraction has 87867 states and 96522 transitions. [2021-12-17 05:04:48,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.66666666666667) internal successors, (1077), 9 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states 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 05:04:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 87867 states and 96522 transitions. [2021-12-17 05:04:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-12-17 05:04:48,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:48,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:04:48,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 05:04:48,496 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,SelfDestructingSolverStorable15 [2021-12-17 05:04:48,497 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash 503973094, now seen corresponding path program 1 times [2021-12-17 05:04:48,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:48,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549706183] [2021-12-17 05:04:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:48,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 05:04:48,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:48,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549706183] [2021-12-17 05:04:48,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549706183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:48,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:48,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:04:48,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119990566] [2021-12-17 05:04:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:48,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:04:48,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:04:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:04:48,839 INFO L87 Difference]: Start difference. First operand 87867 states and 96522 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 05:04:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:52,210 INFO L93 Difference]: Finished difference Result 209401 states and 229452 transitions. [2021-12-17 05:04:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:04:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 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 460 [2021-12-17 05:04:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:52,354 INFO L225 Difference]: With dead ends: 209401 [2021-12-17 05:04:52,355 INFO L226 Difference]: Without dead ends: 116425 [2021-12-17 05:04:52,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:04:52,409 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 778 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:52,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 279 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 05:04:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116425 states. [2021-12-17 05:04:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116425 to 110852. [2021-12-17 05:04:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110852 states, 110851 states have (on average 1.0950104193917962) internal successors, (121383), 110851 states have internal predecessors, (121383), 0 states have call successors, (0), 0 states 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 05:04:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110852 states to 110852 states and 121383 transitions. [2021-12-17 05:04:53,900 INFO L78 Accepts]: Start accepts. Automaton has 110852 states and 121383 transitions. Word has length 460 [2021-12-17 05:04:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:53,901 INFO L470 AbstractCegarLoop]: Abstraction has 110852 states and 121383 transitions. [2021-12-17 05:04:53,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 05:04:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 110852 states and 121383 transitions. [2021-12-17 05:04:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-17 05:04:53,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:53,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:04:53,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 05:04:53,912 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 295544723, now seen corresponding path program 1 times [2021-12-17 05:04:53,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908503639] [2021-12-17 05:04:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:53,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 05:04:54,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908503639] [2021-12-17 05:04:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908503639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:04:54,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:04:54,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:04:54,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607717267] [2021-12-17 05:04:54,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:04:54,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:04:54,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:04:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:04:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:04:54,132 INFO L87 Difference]: Start difference. First operand 110852 states and 121383 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 05:04:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:04:57,411 INFO L93 Difference]: Finished difference Result 248113 states and 271708 transitions. [2021-12-17 05:04:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:04:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 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 494 [2021-12-17 05:04:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:04:57,572 INFO L225 Difference]: With dead ends: 248113 [2021-12-17 05:04:57,573 INFO L226 Difference]: Without dead ends: 136411 [2021-12-17 05:04:57,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:04:57,595 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 698 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:04:57,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 295 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 05:04:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136411 states. [2021-12-17 05:04:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136411 to 116810. [2021-12-17 05:04:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116810 states, 116809 states have (on average 1.0999751731459049) internal successors, (128487), 116809 states have internal predecessors, (128487), 0 states have call successors, (0), 0 states 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 05:04:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116810 states to 116810 states and 128487 transitions. [2021-12-17 05:04:59,090 INFO L78 Accepts]: Start accepts. Automaton has 116810 states and 128487 transitions. Word has length 494 [2021-12-17 05:04:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:04:59,090 INFO L470 AbstractCegarLoop]: Abstraction has 116810 states and 128487 transitions. [2021-12-17 05:04:59,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 05:04:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 116810 states and 128487 transitions. [2021-12-17 05:04:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-17 05:04:59,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:04:59,100 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:04:59,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 05:04:59,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:04:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:04:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1617166263, now seen corresponding path program 1 times [2021-12-17 05:04:59,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:04:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083994719] [2021-12-17 05:04:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:59,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:04:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 257 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:04:59,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:04:59,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083994719] [2021-12-17 05:04:59,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083994719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:04:59,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869758078] [2021-12-17 05:04:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:04:59,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:04:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:04:59,271 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 05:04:59,307 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 05:04:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:04:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 05:04:59,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:05:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 05:05:03,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:05:03,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869758078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:05:03,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:05:03,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 05:05:03,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554748562] [2021-12-17 05:05:03,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:03,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:05:03,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:05:03,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:05:03,017 INFO L87 Difference]: Start difference. First operand 116810 states and 128487 transitions. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 05:05:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:05:05,232 INFO L93 Difference]: Finished difference Result 250258 states and 274833 transitions. [2021-12-17 05:05:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:05:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 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 507 [2021-12-17 05:05:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:05:05,714 INFO L225 Difference]: With dead ends: 250258 [2021-12-17 05:05:05,714 INFO L226 Difference]: Without dead ends: 133450 [2021-12-17 05:05:05,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 506 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 05:05:05,734 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 196 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:05:05,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 347 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 05:05:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133450 states. [2021-12-17 05:05:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133450 to 131734. [2021-12-17 05:05:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131734 states, 131733 states have (on average 1.0905923344947734) internal successors, (143667), 131733 states have internal predecessors, (143667), 0 states have call successors, (0), 0 states 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 05:05:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131734 states to 131734 states and 143667 transitions. [2021-12-17 05:05:07,360 INFO L78 Accepts]: Start accepts. Automaton has 131734 states and 143667 transitions. Word has length 507 [2021-12-17 05:05:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:05:07,360 INFO L470 AbstractCegarLoop]: Abstraction has 131734 states and 143667 transitions. [2021-12-17 05:05:07,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 05:05:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 131734 states and 143667 transitions. [2021-12-17 05:05:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-12-17 05:05:07,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:05:07,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:05:07,388 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 05:05:07,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:05:07,589 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:05:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:05:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash -454745803, now seen corresponding path program 1 times [2021-12-17 05:05:07,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:05:07,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614535496] [2021-12-17 05:05:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:07,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:05:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 257 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 05:05:08,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:05:08,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614535496] [2021-12-17 05:05:08,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614535496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:05:08,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512712776] [2021-12-17 05:05:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:08,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:05:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:05:08,024 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 05:05:08,042 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 05:05:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:08,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:05:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:05:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 05:05:08,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:05:08,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512712776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:05:08,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:05:08,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 05:05:08,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230772050] [2021-12-17 05:05:08,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:08,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:05:08,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:08,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:05:08,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:05:08,671 INFO L87 Difference]: Start difference. First operand 131734 states and 143667 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 05:05:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:05:11,103 INFO L93 Difference]: Finished difference Result 275395 states and 300214 transitions. [2021-12-17 05:05:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:05:11,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 515 [2021-12-17 05:05:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:05:11,292 INFO L225 Difference]: With dead ends: 275395 [2021-12-17 05:05:11,293 INFO L226 Difference]: Without dead ends: 143236 [2021-12-17 05:05:11,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 514 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 05:05:11,369 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 442 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:05:11,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 766 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 05:05:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143236 states. [2021-12-17 05:05:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143236 to 138964. [2021-12-17 05:05:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138964 states, 138963 states have (on average 1.0839504040643912) internal successors, (150629), 138963 states have internal predecessors, (150629), 0 states have call successors, (0), 0 states 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 05:05:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138964 states to 138964 states and 150629 transitions. [2021-12-17 05:05:13,087 INFO L78 Accepts]: Start accepts. Automaton has 138964 states and 150629 transitions. Word has length 515 [2021-12-17 05:05:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:05:13,088 INFO L470 AbstractCegarLoop]: Abstraction has 138964 states and 150629 transitions. [2021-12-17 05:05:13,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 05:05:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 138964 states and 150629 transitions. [2021-12-17 05:05:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-12-17 05:05:13,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:05:13,098 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:05:13,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 05:05:13,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:05:13,312 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:05:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:05:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1547645957, now seen corresponding path program 1 times [2021-12-17 05:05:13,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:05:13,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711122396] [2021-12-17 05:05:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:13,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:05:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 617 proven. 0 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-12-17 05:05:13,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:05:13,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711122396] [2021-12-17 05:05:13,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711122396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:05:13,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:05:13,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:05:13,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525498544] [2021-12-17 05:05:13,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:13,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:05:13,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:05:13,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:05:13,896 INFO L87 Difference]: Start difference. First operand 138964 states and 150629 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 05:05:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:05:15,591 INFO L93 Difference]: Finished difference Result 274511 states and 297340 transitions. [2021-12-17 05:05:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:05:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 548 [2021-12-17 05:05:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:05:15,788 INFO L225 Difference]: With dead ends: 274511 [2021-12-17 05:05:15,788 INFO L226 Difference]: Without dead ends: 135549 [2021-12-17 05:05:15,858 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 05:05:15,860 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 629 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:05:15,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 104 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 05:05:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135549 states. [2021-12-17 05:05:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135549 to 131285. [2021-12-17 05:05:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131285 states, 131284 states have (on average 1.0831632186709728) internal successors, (142202), 131284 states have internal predecessors, (142202), 0 states have call successors, (0), 0 states 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 05:05:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131285 states to 131285 states and 142202 transitions. [2021-12-17 05:05:17,781 INFO L78 Accepts]: Start accepts. Automaton has 131285 states and 142202 transitions. Word has length 548 [2021-12-17 05:05:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:05:17,782 INFO L470 AbstractCegarLoop]: Abstraction has 131285 states and 142202 transitions. [2021-12-17 05:05:17,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 05:05:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 131285 states and 142202 transitions. [2021-12-17 05:05:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-12-17 05:05:17,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:05:17,795 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:05:17,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 05:05:17,796 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:05:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:05:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -122313712, now seen corresponding path program 1 times [2021-12-17 05:05:17,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:05:17,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691124350] [2021-12-17 05:05:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:17,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:05:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 389 proven. 14 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-17 05:05:18,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:05:18,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691124350] [2021-12-17 05:05:18,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691124350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:05:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587552191] [2021-12-17 05:05:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:18,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:05:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:05:18,104 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:05:18,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 05:05:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:18,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 05:05:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:05:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 389 proven. 14 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-17 05:05:20,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 05:05:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 403 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-17 05:05:21,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587552191] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 05:05:21,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 05:05:21,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2021-12-17 05:05:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660789968] [2021-12-17 05:05:21,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:05:21,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:05:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-17 05:05:21,338 INFO L87 Difference]: Start difference. First operand 131285 states and 142202 transitions. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 05:05:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:05:24,222 INFO L93 Difference]: Finished difference Result 278757 states and 301527 transitions. [2021-12-17 05:05:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:05:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 548 [2021-12-17 05:05:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:05:24,400 INFO L225 Difference]: With dead ends: 278757 [2021-12-17 05:05:24,400 INFO L226 Difference]: Without dead ends: 147049 [2021-12-17 05:05:24,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1092 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-17 05:05:24,474 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1086 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:05:24,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 112 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 05:05:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147049 states. [2021-12-17 05:05:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147049 to 134689. [2021-12-17 05:05:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134689 states, 134688 states have (on average 1.0823310168686149) internal successors, (145777), 134688 states have internal predecessors, (145777), 0 states have call successors, (0), 0 states 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 05:05:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134689 states to 134689 states and 145777 transitions. [2021-12-17 05:05:26,314 INFO L78 Accepts]: Start accepts. Automaton has 134689 states and 145777 transitions. Word has length 548 [2021-12-17 05:05:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:05:26,314 INFO L470 AbstractCegarLoop]: Abstraction has 134689 states and 145777 transitions. [2021-12-17 05:05:26,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 05:05:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 134689 states and 145777 transitions. [2021-12-17 05:05:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-17 05:05:26,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:05:26,327 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:05:26,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 05:05:26,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:05:26,529 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:05:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:05:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -395830793, now seen corresponding path program 1 times [2021-12-17 05:05:26,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:05:26,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31752478] [2021-12-17 05:05:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:26,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:05:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 05:05:26,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:05:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31752478] [2021-12-17 05:05:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31752478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:05:26,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:05:26,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:05:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088605021] [2021-12-17 05:05:26,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:05:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:05:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:05:26,687 INFO L87 Difference]: Start difference. First operand 134689 states and 145777 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 05:05:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:05:29,041 INFO L93 Difference]: Finished difference Result 285108 states and 307989 transitions. [2021-12-17 05:05:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:05:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 598 [2021-12-17 05:05:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:05:29,209 INFO L225 Difference]: With dead ends: 285108 [2021-12-17 05:05:29,210 INFO L226 Difference]: Without dead ends: 150421 [2021-12-17 05:05:29,291 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 05:05:29,292 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 213 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:05:29,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 335 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 05:05:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150421 states. [2021-12-17 05:05:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150421 to 142339. [2021-12-17 05:05:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142339 states, 142338 states have (on average 1.0778499065604406) internal successors, (153419), 142338 states have internal predecessors, (153419), 0 states have call successors, (0), 0 states 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 05:05:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142339 states to 142339 states and 153419 transitions. [2021-12-17 05:05:31,398 INFO L78 Accepts]: Start accepts. Automaton has 142339 states and 153419 transitions. Word has length 598 [2021-12-17 05:05:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:05:31,398 INFO L470 AbstractCegarLoop]: Abstraction has 142339 states and 153419 transitions. [2021-12-17 05:05:31,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 05:05:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 142339 states and 153419 transitions. [2021-12-17 05:05:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2021-12-17 05:05:31,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:05:31,415 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 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 05:05:31,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 05:05:31,415 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:05:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:05:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1455899814, now seen corresponding path program 1 times [2021-12-17 05:05:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:05:31,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519733619] [2021-12-17 05:05:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:31,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:05:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 403 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-17 05:05:31,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:05:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519733619] [2021-12-17 05:05:31,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519733619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:05:31,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:05:31,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:05:31,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294121091] [2021-12-17 05:05:31,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:31,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:05:31,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:05:31,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:05:31,605 INFO L87 Difference]: Start difference. First operand 142339 states and 153419 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 05:05:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:05:34,929 INFO L93 Difference]: Finished difference Result 294883 states and 317216 transitions. [2021-12-17 05:05:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:05:34,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 627 [2021-12-17 05:05:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:05:35,521 INFO L225 Difference]: With dead ends: 294883 [2021-12-17 05:05:35,522 INFO L226 Difference]: Without dead ends: 152546 [2021-12-17 05:05:35,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:05:35,580 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 640 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:05:35,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 349 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 05:05:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152546 states. [2021-12-17 05:05:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152546 to 142764. [2021-12-17 05:05:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142764 states, 142763 states have (on average 1.0777372288338014) internal successors, (153861), 142763 states have internal predecessors, (153861), 0 states have call successors, (0), 0 states 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 05:05:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142764 states to 142764 states and 153861 transitions. [2021-12-17 05:05:37,188 INFO L78 Accepts]: Start accepts. Automaton has 142764 states and 153861 transitions. Word has length 627 [2021-12-17 05:05:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:05:37,188 INFO L470 AbstractCegarLoop]: Abstraction has 142764 states and 153861 transitions. [2021-12-17 05:05:37,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 05:05:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 142764 states and 153861 transitions. [2021-12-17 05:05:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2021-12-17 05:05:37,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:05:37,204 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:05:37,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 05:05:37,204 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:05:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:05:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -994235214, now seen corresponding path program 1 times [2021-12-17 05:05:37,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:05:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925379406] [2021-12-17 05:05:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:05:37,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:05:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:05:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 05:05:37,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:05:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925379406] [2021-12-17 05:05:37,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925379406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:05:37,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:05:37,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:05:37,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357904770] [2021-12-17 05:05:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:05:37,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:05:37,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:05:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:05:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:05:37,684 INFO L87 Difference]: Start difference. First operand 142764 states and 153861 transitions. Second operand has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)