./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label21.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 14f7b86bfc883455824a54ae68bb832997924960967cf306b251b3f457d9ff4b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:37:47,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:37:47,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:37:47,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:37:47,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:37:47,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:37:47,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:37:47,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:37:47,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:37:47,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:37:47,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:37:47,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:37:47,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:37:47,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:37:47,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:37:47,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:37:47,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:37:47,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:37:47,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:37:47,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:37:47,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:37:47,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:37:47,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:37:47,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:37:47,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:37:47,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:37:47,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:37:47,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:37:47,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:37:47,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:37:47,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:37:47,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:37:47,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:37:47,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:37:47,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:37:47,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:37:47,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:37:47,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:37:47,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:37:47,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:37:47,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:37:47,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:37:47,496 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:37:47,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:37:47,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:37:47,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:37:47,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:37:47,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:37:47,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:37:47,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:37:47,499 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:37:47,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:37:47,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:37:47,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:37:47,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:37:47,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:37:47,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:37:47,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:37:47,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:37:47,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:37:47,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:37:47,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:37:47,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:37:47,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:37:47,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:37:47,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:37:47,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:37:47,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:37:47,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:37:47,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:37:47,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14f7b86bfc883455824a54ae68bb832997924960967cf306b251b3f457d9ff4b [2021-12-17 04:37:47,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:37:47,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:37:47,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:37:47,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:37:47,731 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:37:47,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label21.c [2021-12-17 04:37:47,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8ce9f4e/f1c5ca62e9ec4c0f84d71048b714c262/FLAG2e0422cf5 [2021-12-17 04:37:48,344 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:37:48,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label21.c [2021-12-17 04:37:48,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8ce9f4e/f1c5ca62e9ec4c0f84d71048b714c262/FLAG2e0422cf5 [2021-12-17 04:37:48,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8ce9f4e/f1c5ca62e9ec4c0f84d71048b714c262 [2021-12-17 04:37:48,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:37:48,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:37:48,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:37:48,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:37:48,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:37:48,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:37:48" (1/1) ... [2021-12-17 04:37:48,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5043781e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:48, skipping insertion in model container [2021-12-17 04:37:48,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:37:48" (1/1) ... [2021-12-17 04:37:48,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:37:48,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:37:49,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label21.c[3130,3143] [2021-12-17 04:37:49,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:37:49,897 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:37:49,919 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label21.c[3130,3143] [2021-12-17 04:37:50,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:37:50,291 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:37:50,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50 WrapperNode [2021-12-17 04:37:50,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:37:50,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:37:50,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:37:50,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:37:50,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:50,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:50,698 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:37:50,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:37:50,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:37:50,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:37:50,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:37:50,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:50,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:50,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:50,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:51,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:51,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:51,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:51,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:37:51,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:37:51,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:37:51,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:37:51,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (1/1) ... [2021-12-17 04:37:51,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:37:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:51,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 04:37:51,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 04:37:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:37:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:37:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:37:51,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:37:51,467 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:37:51,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:37:54,800 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:37:54,816 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:37:54,816 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:37:54,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:54 BoogieIcfgContainer [2021-12-17 04:37:54,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:37:54,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:37:54,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:37:54,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:37:54,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:37:48" (1/3) ... [2021-12-17 04:37:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d7c796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:54, skipping insertion in model container [2021-12-17 04:37:54,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:50" (2/3) ... [2021-12-17 04:37:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d7c796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:54, skipping insertion in model container [2021-12-17 04:37:54,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:54" (3/3) ... [2021-12-17 04:37:54,825 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label21.c [2021-12-17 04:37:54,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:37:54,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:37:54,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:37:54,877 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 04:37:54,878 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:37:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 04:37:54,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:54,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:54,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-12-17 04:37:54,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:54,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759080220] [2021-12-17 04:37:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:54,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:55,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759080220] [2021-12-17 04:37:55,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759080220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:55,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:55,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:55,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272675179] [2021-12-17 04:37:55,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:55,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:55,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:55,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:55,128 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:58,522 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-12-17 04:37:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:58,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-17 04:37:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:58,547 INFO L225 Difference]: With dead ends: 3082 [2021-12-17 04:37:58,547 INFO L226 Difference]: Without dead ends: 1899 [2021-12-17 04:37:58,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:58,556 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1019 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:58,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 04:37:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-17 04:37:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-12-17 04:37:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-12-17 04:37:58,654 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 20 [2021-12-17 04:37:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:58,655 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-12-17 04:37:58,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-12-17 04:37:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 04:37:58,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:58,658 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 04:37:58,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:37:58,659 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1306602698, now seen corresponding path program 1 times [2021-12-17 04:37:58,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397793984] [2021-12-17 04:37:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:58,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:58,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397793984] [2021-12-17 04:37:58,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397793984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:58,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:58,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:58,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563441280] [2021-12-17 04:37:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:58,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:37:58,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:37:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:37:58,841 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:03,711 INFO L93 Difference]: Finished difference Result 6175 states and 10777 transitions. [2021-12-17 04:38:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:38:03,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-17 04:38:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:03,723 INFO L225 Difference]: With dead ends: 6175 [2021-12-17 04:38:03,723 INFO L226 Difference]: Without dead ends: 4283 [2021-12-17 04:38:03,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:38:03,726 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2572 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 1314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2572 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 5546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:03,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2572 Valid, 1098 Invalid, 5546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1314 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 04:38:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-12-17 04:38:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 4282. [2021-12-17 04:38:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 4281 states have (on average 1.4882036907264657) internal successors, (6371), 4281 states have internal predecessors, (6371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 6371 transitions. [2021-12-17 04:38:03,782 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 6371 transitions. Word has length 85 [2021-12-17 04:38:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:03,782 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 6371 transitions. [2021-12-17 04:38:03,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 6371 transitions. [2021-12-17 04:38:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 04:38:03,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:03,785 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 04:38:03,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:38:03,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -359016883, now seen corresponding path program 1 times [2021-12-17 04:38:03,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:03,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025040071] [2021-12-17 04:38:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:03,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:38:03,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:03,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025040071] [2021-12-17 04:38:03,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025040071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:03,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:03,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:03,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288970090] [2021-12-17 04:38:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:03,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:03,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:03,896 INFO L87 Difference]: Start difference. First operand 4282 states and 6371 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:06,207 INFO L93 Difference]: Finished difference Result 7762 states and 11936 transitions. [2021-12-17 04:38:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:06,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-17 04:38:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:06,220 INFO L225 Difference]: With dead ends: 7762 [2021-12-17 04:38:06,221 INFO L226 Difference]: Without dead ends: 4269 [2021-12-17 04:38:06,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:06,227 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 1112 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:06,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1678 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:38:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-12-17 04:38:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4267. [2021-12-17 04:38:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 1.3330989217065166) internal successors, (5687), 4266 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 5687 transitions. [2021-12-17 04:38:06,287 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 5687 transitions. Word has length 145 [2021-12-17 04:38:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:06,288 INFO L470 AbstractCegarLoop]: Abstraction has 4267 states and 5687 transitions. [2021-12-17 04:38:06,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 5687 transitions. [2021-12-17 04:38:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-17 04:38:06,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:06,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:06,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:38:06,291 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1220811748, now seen corresponding path program 1 times [2021-12-17 04:38:06,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:06,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783810099] [2021-12-17 04:38:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:06,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:38:06,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:06,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783810099] [2021-12-17 04:38:06,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783810099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:06,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:06,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:06,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947250412] [2021-12-17 04:38:06,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:06,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:06,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:06,365 INFO L87 Difference]: Start difference. First operand 4267 states and 5687 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:09,043 INFO L93 Difference]: Finished difference Result 10915 states and 15072 transitions. [2021-12-17 04:38:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 04:38:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:09,064 INFO L225 Difference]: With dead ends: 10915 [2021-12-17 04:38:09,065 INFO L226 Difference]: Without dead ends: 7437 [2021-12-17 04:38:09,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:09,079 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 896 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:09,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 889 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:38:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2021-12-17 04:38:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7429. [2021-12-17 04:38:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 7428 states have (on average 1.27140549273021) internal successors, (9444), 7428 states have internal predecessors, (9444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 9444 transitions. [2021-12-17 04:38:09,212 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 9444 transitions. Word has length 183 [2021-12-17 04:38:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:09,213 INFO L470 AbstractCegarLoop]: Abstraction has 7429 states and 9444 transitions. [2021-12-17 04:38:09,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 9444 transitions. [2021-12-17 04:38:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-17 04:38:09,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:09,217 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:09,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:38:09,217 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087642, now seen corresponding path program 1 times [2021-12-17 04:38:09,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:09,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692706536] [2021-12-17 04:38:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:09,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-17 04:38:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692706536] [2021-12-17 04:38:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692706536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:09,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:09,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:38:09,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124726544] [2021-12-17 04:38:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:09,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:09,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:09,341 INFO L87 Difference]: Start difference. First operand 7429 states and 9444 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:11,976 INFO L93 Difference]: Finished difference Result 20360 states and 26298 transitions. [2021-12-17 04:38:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 195 [2021-12-17 04:38:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:12,019 INFO L225 Difference]: With dead ends: 20360 [2021-12-17 04:38:12,020 INFO L226 Difference]: Without dead ends: 13720 [2021-12-17 04:38:12,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:12,029 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 859 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 3204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:12,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1024 Invalid, 3204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:38:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13720 states. [2021-12-17 04:38:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13720 to 13719. [2021-12-17 04:38:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13719 states, 13718 states have (on average 1.2019244787869952) internal successors, (16488), 13718 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13719 states to 13719 states and 16488 transitions. [2021-12-17 04:38:12,211 INFO L78 Accepts]: Start accepts. Automaton has 13719 states and 16488 transitions. Word has length 195 [2021-12-17 04:38:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:12,211 INFO L470 AbstractCegarLoop]: Abstraction has 13719 states and 16488 transitions. [2021-12-17 04:38:12,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13719 states and 16488 transitions. [2021-12-17 04:38:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-17 04:38:12,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:12,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:38:12,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:38:12,218 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash 341216135, now seen corresponding path program 1 times [2021-12-17 04:38:12,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:12,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861703273] [2021-12-17 04:38:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:12,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:38:12,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861703273] [2021-12-17 04:38:12,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861703273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:12,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:12,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:12,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612951768] [2021-12-17 04:38:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:12,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:12,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:12,330 INFO L87 Difference]: Start difference. First operand 13719 states and 16488 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 04:38:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:14,937 INFO L93 Difference]: Finished difference Result 32970 states and 39353 transitions. [2021-12-17 04:38:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:14,937 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 04:38:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:14,963 INFO L225 Difference]: With dead ends: 32970 [2021-12-17 04:38:14,963 INFO L226 Difference]: Without dead ends: 20040 [2021-12-17 04:38:14,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:14,972 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 765 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:14,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 1864 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:38:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20040 states. [2021-12-17 04:38:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20040 to 19230. [2021-12-17 04:38:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19230 states, 19229 states have (on average 1.1674554058973425) internal successors, (22449), 19229 states have internal predecessors, (22449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19230 states to 19230 states and 22449 transitions. [2021-12-17 04:38:15,163 INFO L78 Accepts]: Start accepts. Automaton has 19230 states and 22449 transitions. Word has length 232 [2021-12-17 04:38:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:15,164 INFO L470 AbstractCegarLoop]: Abstraction has 19230 states and 22449 transitions. [2021-12-17 04:38:15,164 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 04:38:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 19230 states and 22449 transitions. [2021-12-17 04:38:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-17 04:38:15,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:15,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:15,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:38:15,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781286, now seen corresponding path program 1 times [2021-12-17 04:38:15,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:15,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482426236] [2021-12-17 04:38:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:15,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-17 04:38:15,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482426236] [2021-12-17 04:38:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482426236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:15,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:15,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:38:15,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996969069] [2021-12-17 04:38:15,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:15,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:15,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:15,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:15,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:15,256 INFO L87 Difference]: Start difference. First operand 19230 states and 22449 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:18,173 INFO L93 Difference]: Finished difference Result 51865 states and 60989 transitions. [2021-12-17 04:38:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 272 [2021-12-17 04:38:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:18,224 INFO L225 Difference]: With dead ends: 51865 [2021-12-17 04:38:18,224 INFO L226 Difference]: Without dead ends: 32633 [2021-12-17 04:38:18,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:18,246 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 916 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:18,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 861 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:38:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32633 states. [2021-12-17 04:38:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32633 to 31834. [2021-12-17 04:38:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31834 states, 31833 states have (on average 1.1326610749850783) internal successors, (36056), 31833 states have internal predecessors, (36056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31834 states to 31834 states and 36056 transitions. [2021-12-17 04:38:18,714 INFO L78 Accepts]: Start accepts. Automaton has 31834 states and 36056 transitions. Word has length 272 [2021-12-17 04:38:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:18,715 INFO L470 AbstractCegarLoop]: Abstraction has 31834 states and 36056 transitions. [2021-12-17 04:38:18,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 31834 states and 36056 transitions. [2021-12-17 04:38:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-17 04:38:18,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:18,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:38:18,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:38:18,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash -256343890, now seen corresponding path program 1 times [2021-12-17 04:38:18,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076208692] [2021-12-17 04:38:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:18,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 04:38:18,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076208692] [2021-12-17 04:38:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076208692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:18,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:18,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:18,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450716922] [2021-12-17 04:38:18,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:18,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:18,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:18,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:18,832 INFO L87 Difference]: Start difference. First operand 31834 states and 36056 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:21,857 INFO L93 Difference]: Finished difference Result 74692 states and 85608 transitions. [2021-12-17 04:38:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-12-17 04:38:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:21,918 INFO L225 Difference]: With dead ends: 74692 [2021-12-17 04:38:21,918 INFO L226 Difference]: Without dead ends: 43647 [2021-12-17 04:38:21,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:21,947 INFO L933 BasicCegarLoop]: 1772 mSDtfsCounter, 848 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 1914 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:38:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43647 states. [2021-12-17 04:38:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43647 to 42856. [2021-12-17 04:38:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42856 states, 42855 states have (on average 1.114782405786956) internal successors, (47774), 42855 states have internal predecessors, (47774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42856 states to 42856 states and 47774 transitions. [2021-12-17 04:38:22,380 INFO L78 Accepts]: Start accepts. Automaton has 42856 states and 47774 transitions. Word has length 311 [2021-12-17 04:38:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:22,380 INFO L470 AbstractCegarLoop]: Abstraction has 42856 states and 47774 transitions. [2021-12-17 04:38:22,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42856 states and 47774 transitions. [2021-12-17 04:38:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-17 04:38:22,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:22,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:38:22,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1925416806, now seen corresponding path program 1 times [2021-12-17 04:38:22,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892148350] [2021-12-17 04:38:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:22,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 195 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 04:38:22,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892148350] [2021-12-17 04:38:22,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892148350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:38:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241307739] [2021-12-17 04:38:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:22,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:22,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:22,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:38:22,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:38:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:22,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:38:22,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-17 04:38:23,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:23,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241307739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:23,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:23,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:38:23,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111820943] [2021-12-17 04:38:23,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:23,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:23,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:38:23,274 INFO L87 Difference]: Start difference. First operand 42856 states and 47774 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:25,855 INFO L93 Difference]: Finished difference Result 84921 states and 94753 transitions. [2021-12-17 04:38:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2021-12-17 04:38:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:25,903 INFO L225 Difference]: With dead ends: 84921 [2021-12-17 04:38:25,903 INFO L226 Difference]: Without dead ends: 42854 [2021-12-17 04:38:25,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:38:25,935 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1119 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:25,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 1421 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:38:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42854 states. [2021-12-17 04:38:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42854 to 42853. [2021-12-17 04:38:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42853 states, 42852 states have (on average 1.0876738541958368) internal successors, (46609), 42852 states have internal predecessors, (46609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42853 states to 42853 states and 46609 transitions. [2021-12-17 04:38:26,357 INFO L78 Accepts]: Start accepts. Automaton has 42853 states and 46609 transitions. Word has length 340 [2021-12-17 04:38:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:26,357 INFO L470 AbstractCegarLoop]: Abstraction has 42853 states and 46609 transitions. [2021-12-17 04:38:26,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 42853 states and 46609 transitions. [2021-12-17 04:38:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-17 04:38:26,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:26,363 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:26,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 04:38:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:26,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -22099335, now seen corresponding path program 1 times [2021-12-17 04:38:26,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:26,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781959830] [2021-12-17 04:38:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:26,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-17 04:38:26,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781959830] [2021-12-17 04:38:26,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781959830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:26,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:26,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:26,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461820243] [2021-12-17 04:38:26,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:26,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:38:26,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:38:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:26,662 INFO L87 Difference]: Start difference. First operand 42853 states and 46609 transitions. Second operand has 4 states, 4 states have (on average 71.75) 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 04:38:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:32,610 INFO L93 Difference]: Finished difference Result 147299 states and 160577 transitions. [2021-12-17 04:38:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:38:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) 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 368 [2021-12-17 04:38:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:32,738 INFO L225 Difference]: With dead ends: 147299 [2021-12-17 04:38:32,738 INFO L226 Difference]: Without dead ends: 105235 [2021-12-17 04:38:32,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:32,777 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 1702 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 6630 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 7650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 6630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:32,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 805 Invalid, 7650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1020 Valid, 6630 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 04:38:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105235 states. [2021-12-17 04:38:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105235 to 102742. [2021-12-17 04:38:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102742 states, 102741 states have (on average 1.0797442111717814) internal successors, (110934), 102741 states have internal predecessors, (110934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102742 states to 102742 states and 110934 transitions. [2021-12-17 04:38:33,933 INFO L78 Accepts]: Start accepts. Automaton has 102742 states and 110934 transitions. Word has length 368 [2021-12-17 04:38:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:33,933 INFO L470 AbstractCegarLoop]: Abstraction has 102742 states and 110934 transitions. [2021-12-17 04:38:33,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) 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 04:38:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 102742 states and 110934 transitions. [2021-12-17 04:38:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-17 04:38:33,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:33,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:33,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:38:33,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash -208077102, now seen corresponding path program 1 times [2021-12-17 04:38:33,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682903209] [2021-12-17 04:38:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:33,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 251 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 04:38:34,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682903209] [2021-12-17 04:38:34,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682903209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:38:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124613196] [2021-12-17 04:38:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:34,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:34,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:38:34,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:38:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:38:34,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:38:34,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:34,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124613196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:34,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:34,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:38:34,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954364070] [2021-12-17 04:38:34,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:34,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:34,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:34,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:34,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:34,697 INFO L87 Difference]: Start difference. First operand 102742 states and 110934 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:38,249 INFO L93 Difference]: Finished difference Result 203105 states and 220871 transitions. [2021-12-17 04:38:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 368 [2021-12-17 04:38:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:38,409 INFO L225 Difference]: With dead ends: 203105 [2021-12-17 04:38:38,409 INFO L226 Difference]: Without dead ends: 113754 [2021-12-17 04:38:38,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:38,440 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 1215 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:38,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 402 Invalid, 3185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:38:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113754 states. [2021-12-17 04:38:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113754 to 113754. [2021-12-17 04:38:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113754 states, 113753 states have (on average 1.0813956554991957) internal successors, (123012), 113753 states have internal predecessors, (123012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113754 states to 113754 states and 123012 transitions. [2021-12-17 04:38:39,936 INFO L78 Accepts]: Start accepts. Automaton has 113754 states and 123012 transitions. Word has length 368 [2021-12-17 04:38:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:39,936 INFO L470 AbstractCegarLoop]: Abstraction has 113754 states and 123012 transitions. [2021-12-17 04:38:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 113754 states and 123012 transitions. [2021-12-17 04:38:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-12-17 04:38:39,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:39,943 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:39,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 04:38:40,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 04:38:40,152 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -553457891, now seen corresponding path program 1 times [2021-12-17 04:38:40,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917939708] [2021-12-17 04:38:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:40,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:38:40,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:40,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917939708] [2021-12-17 04:38:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917939708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:40,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:40,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768535875] [2021-12-17 04:38:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:40,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:40,272 INFO L87 Difference]: Start difference. First operand 113754 states and 123012 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:43,299 INFO L93 Difference]: Finished difference Result 228316 states and 246851 transitions. [2021-12-17 04:38:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 401 [2021-12-17 04:38:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:43,583 INFO L225 Difference]: With dead ends: 228316 [2021-12-17 04:38:43,583 INFO L226 Difference]: Without dead ends: 115351 [2021-12-17 04:38:43,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:43,613 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 802 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:43,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1099 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:38:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115351 states. [2021-12-17 04:38:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115351 to 113755. [2021-12-17 04:38:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113755 states, 113754 states have (on average 1.0745732018214744) internal successors, (122237), 113754 states have internal predecessors, (122237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113755 states to 113755 states and 122237 transitions. [2021-12-17 04:38:45,148 INFO L78 Accepts]: Start accepts. Automaton has 113755 states and 122237 transitions. Word has length 401 [2021-12-17 04:38:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:45,159 INFO L470 AbstractCegarLoop]: Abstraction has 113755 states and 122237 transitions. [2021-12-17 04:38:45,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 113755 states and 122237 transitions. [2021-12-17 04:38:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-17 04:38:45,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:45,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:45,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:38:45,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash -426963613, now seen corresponding path program 1 times [2021-12-17 04:38:45,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:45,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182720159] [2021-12-17 04:38:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:45,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 336 proven. 110 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-17 04:38:45,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182720159] [2021-12-17 04:38:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182720159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:38:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794910765] [2021-12-17 04:38:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:45,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:45,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:38:45,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:38:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:45,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:38:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-12-17 04:38:45,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794910765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:45,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:45,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:38:45,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744457652] [2021-12-17 04:38:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:45,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:45,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:45,991 INFO L87 Difference]: Start difference. First operand 113755 states and 122237 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:49,233 INFO L93 Difference]: Finished difference Result 228292 states and 245263 transitions. [2021-12-17 04:38:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 04:38:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:49,402 INFO L225 Difference]: With dead ends: 228292 [2021-12-17 04:38:49,402 INFO L226 Difference]: Without dead ends: 115326 [2021-12-17 04:38:49,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:49,451 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 1018 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:49,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1466 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:38:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115326 states. [2021-12-17 04:38:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115326 to 113738. [2021-12-17 04:38:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113738 states, 113737 states have (on average 1.0608860792881825) internal successors, (120662), 113737 states have internal predecessors, (120662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113738 states to 113738 states and 120662 transitions. [2021-12-17 04:38:50,865 INFO L78 Accepts]: Start accepts. Automaton has 113738 states and 120662 transitions. Word has length 411 [2021-12-17 04:38:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:50,865 INFO L470 AbstractCegarLoop]: Abstraction has 113738 states and 120662 transitions. [2021-12-17 04:38:50,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 113738 states and 120662 transitions. [2021-12-17 04:38:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-17 04:38:50,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:50,882 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:50,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:38:51,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:51,096 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:51,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1720056613, now seen corresponding path program 1 times [2021-12-17 04:38:51,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:51,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689773306] [2021-12-17 04:38:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:51,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2021-12-17 04:38:51,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:51,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689773306] [2021-12-17 04:38:51,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689773306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:51,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:51,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:38:51,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768665394] [2021-12-17 04:38:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:51,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:38:51,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:38:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:51,250 INFO L87 Difference]: Start difference. First operand 113738 states and 120662 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:57,783 INFO L93 Difference]: Finished difference Result 287414 states and 304990 transitions. [2021-12-17 04:38:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:38:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 04:38:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:57,992 INFO L225 Difference]: With dead ends: 287414 [2021-12-17 04:38:57,993 INFO L226 Difference]: Without dead ends: 174465 [2021-12-17 04:38:58,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:58,042 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 1787 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 7905 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 8926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 7905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:58,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1787 Valid, 1666 Invalid, 8926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 7905 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 04:38:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174465 states. [2021-12-17 04:38:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174465 to 168854. [2021-12-17 04:38:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168854 states, 168853 states have (on average 1.0562264217988429) internal successors, (178347), 168853 states have internal predecessors, (178347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168854 states to 168854 states and 178347 transitions. [2021-12-17 04:39:00,138 INFO L78 Accepts]: Start accepts. Automaton has 168854 states and 178347 transitions. Word has length 451 [2021-12-17 04:39:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:00,138 INFO L470 AbstractCegarLoop]: Abstraction has 168854 states and 178347 transitions. [2021-12-17 04:39:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 168854 states and 178347 transitions. [2021-12-17 04:39:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2021-12-17 04:39:00,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:00,443 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:39:00,443 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1505825290, now seen corresponding path program 1 times [2021-12-17 04:39:00,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8607604] [2021-12-17 04:39:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:00,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 827 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-17 04:39:00,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8607604] [2021-12-17 04:39:00,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8607604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:00,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:00,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:00,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714458154] [2021-12-17 04:39:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:00,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:00,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:00,653 INFO L87 Difference]: Start difference. First operand 168854 states and 178347 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 04:39:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:03,999 INFO L93 Difference]: Finished difference Result 360540 states and 381964 transitions. [2021-12-17 04:39:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:04,000 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 635 [2021-12-17 04:39:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:04,420 INFO L225 Difference]: With dead ends: 360540 [2021-12-17 04:39:04,420 INFO L226 Difference]: Without dead ends: 190901 [2021-12-17 04:39:04,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:04,488 INFO L933 BasicCegarLoop]: 1718 mSDtfsCounter, 722 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:04,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1859 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:39:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190901 states. [2021-12-17 04:39:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190901 to 184588. [2021-12-17 04:39:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184588 states, 184587 states have (on average 1.051319973779302) internal successors, (194060), 184587 states have internal predecessors, (194060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184588 states to 184588 states and 194060 transitions. [2021-12-17 04:39:06,860 INFO L78 Accepts]: Start accepts. Automaton has 184588 states and 194060 transitions. Word has length 635 [2021-12-17 04:39:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:06,861 INFO L470 AbstractCegarLoop]: Abstraction has 184588 states and 194060 transitions. [2021-12-17 04:39:06,861 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 04:39:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 184588 states and 194060 transitions. [2021-12-17 04:39:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2021-12-17 04:39:06,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:06,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:06,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:39:06,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1396421287, now seen corresponding path program 1 times [2021-12-17 04:39:06,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:06,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047874410] [2021-12-17 04:39:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:06,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 04:39:07,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:07,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047874410] [2021-12-17 04:39:07,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047874410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:07,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:07,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:07,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627798746] [2021-12-17 04:39:07,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:07,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:07,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:07,046 INFO L87 Difference]: Start difference. First operand 184588 states and 194060 transitions. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:10,289 INFO L93 Difference]: Finished difference Result 367573 states and 386452 transitions. [2021-12-17 04:39:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 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 635 [2021-12-17 04:39:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:10,737 INFO L225 Difference]: With dead ends: 367573 [2021-12-17 04:39:10,737 INFO L226 Difference]: Without dead ends: 183774 [2021-12-17 04:39:10,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:10,805 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 858 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:10,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 625 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:39:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183774 states. [2021-12-17 04:39:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183774 to 182184. [2021-12-17 04:39:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182184 states, 182183 states have (on average 1.0411015297804955) internal successors, (189671), 182183 states have internal predecessors, (189671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182184 states to 182184 states and 189671 transitions. [2021-12-17 04:39:12,828 INFO L78 Accepts]: Start accepts. Automaton has 182184 states and 189671 transitions. Word has length 635 [2021-12-17 04:39:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:12,829 INFO L470 AbstractCegarLoop]: Abstraction has 182184 states and 189671 transitions. [2021-12-17 04:39:12,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 182184 states and 189671 transitions. [2021-12-17 04:39:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2021-12-17 04:39:12,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:12,874 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:12,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:39:12,874 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1258524557, now seen corresponding path program 1 times [2021-12-17 04:39:12,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:12,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380106558] [2021-12-17 04:39:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:12,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-12-17 04:39:13,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380106558] [2021-12-17 04:39:13,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380106558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:13,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:13,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:39:13,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294224457] [2021-12-17 04:39:13,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:13,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:13,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:13,053 INFO L87 Difference]: Start difference. First operand 182184 states and 189671 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:15,792 INFO L93 Difference]: Finished difference Result 344669 states and 359130 transitions. [2021-12-17 04:39:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 672 [2021-12-17 04:39:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:16,027 INFO L225 Difference]: With dead ends: 344669 [2021-12-17 04:39:16,028 INFO L226 Difference]: Without dead ends: 179807 [2021-12-17 04:39:16,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:16,093 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1586 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:16,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 263 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 04:39:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179807 states. [2021-12-17 04:39:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179807 to 179805. [2021-12-17 04:39:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179805 states, 179804 states have (on average 1.0405775177415408) internal successors, (187100), 179804 states have internal predecessors, (187100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179805 states to 179805 states and 187100 transitions. [2021-12-17 04:39:18,188 INFO L78 Accepts]: Start accepts. Automaton has 179805 states and 187100 transitions. Word has length 672 [2021-12-17 04:39:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:18,188 INFO L470 AbstractCegarLoop]: Abstraction has 179805 states and 187100 transitions. [2021-12-17 04:39:18,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 179805 states and 187100 transitions. [2021-12-17 04:39:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2021-12-17 04:39:18,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:18,221 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:18,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:39:18,221 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:18,222 INFO L85 PathProgramCache]: Analyzing trace with hash -346595325, now seen corresponding path program 1 times [2021-12-17 04:39:18,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:18,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688245198] [2021-12-17 04:39:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:18,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 445 proven. 110 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 04:39:18,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688245198] [2021-12-17 04:39:18,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688245198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:39:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577377469] [2021-12-17 04:39:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:18,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:39:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:39:18,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:39:18,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 04:39:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:39:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:39:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-17 04:39:20,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:39:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577377469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:20,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:39:20,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:39:20,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029149424] [2021-12-17 04:39:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:20,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:20,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:39:20,086 INFO L87 Difference]: Start difference. First operand 179805 states and 187100 transitions. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:39:23,209 INFO L93 Difference]: Finished difference Result 345448 states and 359763 transitions. [2021-12-17 04:39:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:39:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 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 680 [2021-12-17 04:39:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:39:23,458 INFO L225 Difference]: With dead ends: 345448 [2021-12-17 04:39:23,458 INFO L226 Difference]: Without dead ends: 180601 [2021-12-17 04:39:23,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:39:23,534 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 682 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:39:23,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1061 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:39:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180601 states. [2021-12-17 04:39:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180601 to 178228. [2021-12-17 04:39:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178228 states, 178227 states have (on average 1.0368855448388852) internal successors, (184801), 178227 states have internal predecessors, (184801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178228 states to 178228 states and 184801 transitions. [2021-12-17 04:39:25,668 INFO L78 Accepts]: Start accepts. Automaton has 178228 states and 184801 transitions. Word has length 680 [2021-12-17 04:39:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:39:25,669 INFO L470 AbstractCegarLoop]: Abstraction has 178228 states and 184801 transitions. [2021-12-17 04:39:25,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:39:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 178228 states and 184801 transitions. [2021-12-17 04:39:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-12-17 04:39:25,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:39:25,691 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:39:25,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 04:39:25,892 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,SelfDestructingSolverStorable17 [2021-12-17 04:39:25,892 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:39:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:39:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash -684953833, now seen corresponding path program 1 times [2021-12-17 04:39:25,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:39:25,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991431289] [2021-12-17 04:39:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:39:25,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:39:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:39:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 864 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-17 04:39:26,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:39:26,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991431289] [2021-12-17 04:39:26,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991431289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:39:26,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:39:26,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:39:26,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018063364] [2021-12-17 04:39:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:39:26,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:39:26,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:39:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:39:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:39:26,068 INFO L87 Difference]: Start difference. First operand 178228 states and 184801 transitions. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)