./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label47.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_label47.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 9caa4030530e2e9671468e08c95e91bac3f6959ea80b1f57c09b5d22d183ce56 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:41:09,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:41:09,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:41:09,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:41:09,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:41:09,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:41:09,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:41:09,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:41:09,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:41:09,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:41:09,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:41:09,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:41:09,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:41:09,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:41:09,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:41:09,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:41:09,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:41:09,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:41:09,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:41:09,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:41:09,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:41:09,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:41:09,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:41:09,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:41:09,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:41:09,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:41:09,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:41:09,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:41:09,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:41:09,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:41:09,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:41:09,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:41:09,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:41:09,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:41:09,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:41:09,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:41:09,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:41:09,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:41:09,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:41:09,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:41:09,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:41:09,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:41:09,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:41:09,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:41:09,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:41:09,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:41:09,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:41:09,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:41:09,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:41:09,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:41:09,715 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:41:09,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:41:09,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:41:09,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:41:09,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:41:09,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:41:09,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:41:09,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:41:09,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:41:09,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:41:09,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:41:09,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:41:09,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:41:09,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:41:09,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:41:09,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:41:09,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:41:09,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:41:09,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:41:09,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:41:09,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:41:09,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:41:09,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:41:09,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:41:09,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:41:09,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:41:09,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9caa4030530e2e9671468e08c95e91bac3f6959ea80b1f57c09b5d22d183ce56 [2021-12-17 04:41:09,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:41:09,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:41:09,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:41:09,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:41:09,980 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:41:09,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label47.c [2021-12-17 04:41:10,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e6d090/ffbf9dabf6db423985f8dd67d36aec9d/FLAG0fd90350b [2021-12-17 04:41:10,743 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:41:10,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label47.c [2021-12-17 04:41:10,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e6d090/ffbf9dabf6db423985f8dd67d36aec9d/FLAG0fd90350b [2021-12-17 04:41:10,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e6d090/ffbf9dabf6db423985f8dd67d36aec9d [2021-12-17 04:41:10,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:41:10,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:41:10,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:41:10,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:41:10,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:41:10,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:41:10" (1/1) ... [2021-12-17 04:41:10,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41563a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:10, skipping insertion in model container [2021-12-17 04:41:10,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:41:10" (1/1) ... [2021-12-17 04:41:10,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:41:11,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:41:11,335 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_label47.c[6189,6202] [2021-12-17 04:41:12,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:41:12,341 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:41:12,371 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_label47.c[6189,6202] [2021-12-17 04:41:12,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:41:12,865 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:41:12,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12 WrapperNode [2021-12-17 04:41:12,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:41:12,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:41:12,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:41:12,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:41:12,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:12,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:13,586 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:41:13,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:41:13,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:41:13,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:41:13,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:41:13,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:13,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:13,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:13,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:14,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:14,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:14,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:14,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:41:14,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:41:14,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:41:14,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:41:14,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (1/1) ... [2021-12-17 04:41:14,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:41:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:41:14,441 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 04:41:14,463 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 04:41:14,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:41:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:41:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:41:14,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:41:14,534 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:41:14,535 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:41:18,860 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:41:18,883 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:41:18,883 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:41:18,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:41:18 BoogieIcfgContainer [2021-12-17 04:41:18,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:41:18,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:41:18,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:41:18,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:41:18,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:41:10" (1/3) ... [2021-12-17 04:41:18,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442cb726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:41:18, skipping insertion in model container [2021-12-17 04:41:18,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:41:12" (2/3) ... [2021-12-17 04:41:18,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442cb726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:41:18, skipping insertion in model container [2021-12-17 04:41:18,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:41:18" (3/3) ... [2021-12-17 04:41:18,895 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label47.c [2021-12-17 04:41:18,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:41:18,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:41:18,945 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:41:18,951 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 04:41:18,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:41:18,981 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 04:41:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 04:41:18,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:18,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:18,989 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-17 04:41:19,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:19,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427832778] [2021-12-17 04:41:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:19,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:19,267 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 04:41:19,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427832778] [2021-12-17 04:41:19,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427832778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:19,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:19,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:41:19,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857618308] [2021-12-17 04:41:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:19,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:19,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:19,310 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:24,032 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-17 04:41:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-17 04:41:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:24,079 INFO L225 Difference]: With dead ends: 3160 [2021-12-17 04:41:24,081 INFO L226 Difference]: Without dead ends: 1983 [2021-12-17 04:41:24,090 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 04:41:24,097 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1060 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:24,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-17 04:41:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-17 04:41:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-17 04:41:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-17 04:41:24,228 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 43 [2021-12-17 04:41:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:24,229 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-17 04:41:24,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-17 04:41:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 04:41:24,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:24,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 04:41:24,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:41:24,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:24,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1763711674, now seen corresponding path program 1 times [2021-12-17 04:41:24,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:24,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315061952] [2021-12-17 04:41:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:24,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:24,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315061952] [2021-12-17 04:41:24,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315061952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:24,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:24,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:24,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812815340] [2021-12-17 04:41:24,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:24,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:24,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:24,475 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:29,962 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-17 04:41:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-17 04:41:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:29,981 INFO L225 Difference]: With dead ends: 6254 [2021-12-17 04:41:29,981 INFO L226 Difference]: Without dead ends: 4326 [2021-12-17 04:41:29,985 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 04:41:29,986 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2617 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4155 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 5589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:29,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2617 Valid, 1037 Invalid, 5589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4155 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 04:41:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-17 04:41:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-17 04:41:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.5293845441925036) internal successors, (6610), 4322 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6610 transitions. [2021-12-17 04:41:30,074 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6610 transitions. Word has length 108 [2021-12-17 04:41:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:30,077 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6610 transitions. [2021-12-17 04:41:30,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6610 transitions. [2021-12-17 04:41:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 04:41:30,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:30,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:41:30,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:41:30,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash 739782231, now seen corresponding path program 1 times [2021-12-17 04:41:30,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:30,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754666363] [2021-12-17 04:41:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:30,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:30,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754666363] [2021-12-17 04:41:30,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754666363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:41:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836705737] [2021-12-17 04:41:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:30,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:41:30,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:41:30,332 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 04:41:30,335 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 04:41:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:41:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:41:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 04:41:30,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:41:30,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836705737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:30,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:41:30,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:41:30,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969352402] [2021-12-17 04:41:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:30,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:30,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:41:30,795 INFO L87 Difference]: Start difference. First operand 4323 states and 6610 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:33,868 INFO L93 Difference]: Finished difference Result 11043 states and 17775 transitions. [2021-12-17 04:41:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 168 [2021-12-17 04:41:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:33,908 INFO L225 Difference]: With dead ends: 11043 [2021-12-17 04:41:33,909 INFO L226 Difference]: Without dead ends: 7509 [2021-12-17 04:41:33,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 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 04:41:33,919 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 743 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:33,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1184 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:41:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-12-17 04:41:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 7489. [2021-12-17 04:41:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7489 states, 7488 states have (on average 1.3767361111111112) internal successors, (10309), 7488 states have internal predecessors, (10309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7489 states to 7489 states and 10309 transitions. [2021-12-17 04:41:34,090 INFO L78 Accepts]: Start accepts. Automaton has 7489 states and 10309 transitions. Word has length 168 [2021-12-17 04:41:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:34,092 INFO L470 AbstractCegarLoop]: Abstraction has 7489 states and 10309 transitions. [2021-12-17 04:41:34,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7489 states and 10309 transitions. [2021-12-17 04:41:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-17 04:41:34,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:34,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 04:41:34,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:41:34,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:41:34,321 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1528917195, now seen corresponding path program 1 times [2021-12-17 04:41:34,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:34,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962701196] [2021-12-17 04:41:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:34,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:41:34,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962701196] [2021-12-17 04:41:34,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962701196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:34,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:34,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:41:34,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498592182] [2021-12-17 04:41:34,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:34,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:34,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:34,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:34,453 INFO L87 Difference]: Start difference. First operand 7489 states and 10309 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:37,451 INFO L93 Difference]: Finished difference Result 20514 states and 28842 transitions. [2021-12-17 04:41:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-12-17 04:41:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:37,495 INFO L225 Difference]: With dead ends: 20514 [2021-12-17 04:41:37,496 INFO L226 Difference]: Without dead ends: 13814 [2021-12-17 04:41:37,508 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 04:41:37,509 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 908 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:37,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 942 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:41:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13814 states. [2021-12-17 04:41:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13814 to 13805. [2021-12-17 04:41:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13805 states, 13804 states have (on average 1.2959287163141118) internal successors, (17889), 13804 states have internal predecessors, (17889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13805 states to 13805 states and 17889 transitions. [2021-12-17 04:41:37,824 INFO L78 Accepts]: Start accepts. Automaton has 13805 states and 17889 transitions. Word has length 210 [2021-12-17 04:41:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:37,825 INFO L470 AbstractCegarLoop]: Abstraction has 13805 states and 17889 transitions. [2021-12-17 04:41:37,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 13805 states and 17889 transitions. [2021-12-17 04:41:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-17 04:41:37,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:37,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:37,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:41:37,830 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1408513717, now seen corresponding path program 1 times [2021-12-17 04:41:37,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032662462] [2021-12-17 04:41:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:37,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:37,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032662462] [2021-12-17 04:41:37,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032662462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:37,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:37,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:37,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185165254] [2021-12-17 04:41:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:37,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:37,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:37,973 INFO L87 Difference]: Start difference. First operand 13805 states and 17889 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:43,555 INFO L93 Difference]: Finished difference Result 38804 states and 51109 transitions. [2021-12-17 04:41:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2021-12-17 04:41:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:43,611 INFO L225 Difference]: With dead ends: 38804 [2021-12-17 04:41:43,611 INFO L226 Difference]: Without dead ends: 25788 [2021-12-17 04:41:43,628 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 04:41:43,629 INFO L933 BasicCegarLoop]: 1077 mSDtfsCounter, 1642 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 5860 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 5860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:43,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1642 Valid, 1248 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 5860 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 04:41:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-12-17 04:41:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 25646. [2021-12-17 04:41:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25646 states, 25645 states have (on average 1.2608305712614545) internal successors, (32334), 25645 states have internal predecessors, (32334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 32334 transitions. [2021-12-17 04:41:43,991 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 32334 transitions. Word has length 240 [2021-12-17 04:41:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:43,992 INFO L470 AbstractCegarLoop]: Abstraction has 25646 states and 32334 transitions. [2021-12-17 04:41:43,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 32334 transitions. [2021-12-17 04:41:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-12-17 04:41:43,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:43,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:43,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:41:43,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:43,999 INFO L85 PathProgramCache]: Analyzing trace with hash -799759290, now seen corresponding path program 1 times [2021-12-17 04:41:44,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:44,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731306405] [2021-12-17 04:41:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:44,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 04:41:44,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:44,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731306405] [2021-12-17 04:41:44,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731306405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:44,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:44,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:41:44,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165214471] [2021-12-17 04:41:44,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:44,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:44,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:44,136 INFO L87 Difference]: Start difference. First operand 25646 states and 32334 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:47,437 INFO L93 Difference]: Finished difference Result 71749 states and 91166 transitions. [2021-12-17 04:41:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 282 [2021-12-17 04:41:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:47,518 INFO L225 Difference]: With dead ends: 71749 [2021-12-17 04:41:47,519 INFO L226 Difference]: Without dead ends: 46892 [2021-12-17 04:41:47,549 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 04:41:47,550 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 853 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:47,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 991 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:41:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46892 states. [2021-12-17 04:41:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46892 to 43740. [2021-12-17 04:41:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43740 states, 43739 states have (on average 1.194608930245319) internal successors, (52251), 43739 states have internal predecessors, (52251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43740 states to 43740 states and 52251 transitions. [2021-12-17 04:41:48,116 INFO L78 Accepts]: Start accepts. Automaton has 43740 states and 52251 transitions. Word has length 282 [2021-12-17 04:41:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:48,117 INFO L470 AbstractCegarLoop]: Abstraction has 43740 states and 52251 transitions. [2021-12-17 04:41:48,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 43740 states and 52251 transitions. [2021-12-17 04:41:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-17 04:41:48,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:48,123 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 04:41:48,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:41:48,123 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1853881210, now seen corresponding path program 1 times [2021-12-17 04:41:48,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334349784] [2021-12-17 04:41:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:48,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 04:41:48,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334349784] [2021-12-17 04:41:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334349784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:48,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:48,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485910655] [2021-12-17 04:41:48,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:48,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:48,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:48,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:48,248 INFO L87 Difference]: Start difference. First operand 43740 states and 52251 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:54,828 INFO L93 Difference]: Finished difference Result 113679 states and 137630 transitions. [2021-12-17 04:41:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2021-12-17 04:41:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:54,941 INFO L225 Difference]: With dead ends: 113679 [2021-12-17 04:41:54,942 INFO L226 Difference]: Without dead ends: 70728 [2021-12-17 04:41:54,990 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 04:41:54,992 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 1762 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6132 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 7261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 6132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:54,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 828 Invalid, 7261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 6132 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-17 04:41:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70728 states. [2021-12-17 04:41:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70728 to 53991. [2021-12-17 04:41:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53991 states, 53990 states have (on average 1.1828116317836637) internal successors, (63860), 53990 states have internal predecessors, (63860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53991 states to 53991 states and 63860 transitions. [2021-12-17 04:41:56,035 INFO L78 Accepts]: Start accepts. Automaton has 53991 states and 63860 transitions. Word has length 283 [2021-12-17 04:41:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:56,036 INFO L470 AbstractCegarLoop]: Abstraction has 53991 states and 63860 transitions. [2021-12-17 04:41:56,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 53991 states and 63860 transitions. [2021-12-17 04:41:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-17 04:41:56,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:56,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:41:56,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:41:56,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:56,049 INFO L85 PathProgramCache]: Analyzing trace with hash 972475612, now seen corresponding path program 1 times [2021-12-17 04:41:56,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:56,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565037968] [2021-12-17 04:41:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:56,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 04:41:56,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:56,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565037968] [2021-12-17 04:41:56,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565037968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:56,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:56,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:56,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478981004] [2021-12-17 04:41:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:56,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:56,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:56,178 INFO L87 Difference]: Start difference. First operand 53991 states and 63860 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:59,767 INFO L93 Difference]: Finished difference Result 131603 states and 158219 transitions. [2021-12-17 04:41:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 341 [2021-12-17 04:41:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:59,880 INFO L225 Difference]: With dead ends: 131603 [2021-12-17 04:41:59,880 INFO L226 Difference]: Without dead ends: 78401 [2021-12-17 04:41:59,915 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 04:41:59,916 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 789 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:59,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 1067 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:41:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78401 states. [2021-12-17 04:42:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78401 to 76028. [2021-12-17 04:42:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 1.1725045049784946) internal successors, (89142), 76027 states have internal predecessors, (89142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 89142 transitions. [2021-12-17 04:42:01,071 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 89142 transitions. Word has length 341 [2021-12-17 04:42:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:01,072 INFO L470 AbstractCegarLoop]: Abstraction has 76028 states and 89142 transitions. [2021-12-17 04:42:01,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 89142 transitions. [2021-12-17 04:42:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-12-17 04:42:01,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:01,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:01,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:42:01,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2021351561, now seen corresponding path program 1 times [2021-12-17 04:42:01,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122822275] [2021-12-17 04:42:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:01,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 04:42:01,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122822275] [2021-12-17 04:42:01,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122822275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:01,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:01,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:01,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024182250] [2021-12-17 04:42:01,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:01,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:01,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:01,198 INFO L87 Difference]: Start difference. First operand 76028 states and 89142 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:04,360 INFO L93 Difference]: Finished difference Result 152091 states and 178353 transitions. [2021-12-17 04:42:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 369 [2021-12-17 04:42:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:04,573 INFO L225 Difference]: With dead ends: 152091 [2021-12-17 04:42:04,573 INFO L226 Difference]: Without dead ends: 76852 [2021-12-17 04:42:04,622 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 04:42:04,626 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:04,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1993 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:42:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76852 states. [2021-12-17 04:42:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76852 to 76816. [2021-12-17 04:42:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76816 states, 76815 states have (on average 1.155568573846254) internal successors, (88765), 76815 states have internal predecessors, (88765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76816 states to 76816 states and 88765 transitions. [2021-12-17 04:42:05,629 INFO L78 Accepts]: Start accepts. Automaton has 76816 states and 88765 transitions. Word has length 369 [2021-12-17 04:42:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:05,630 INFO L470 AbstractCegarLoop]: Abstraction has 76816 states and 88765 transitions. [2021-12-17 04:42:05,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 76816 states and 88765 transitions. [2021-12-17 04:42:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-17 04:42:05,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:05,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 04:42:05,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:42:05,638 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1007739519, now seen corresponding path program 1 times [2021-12-17 04:42:05,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:05,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148611082] [2021-12-17 04:42:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:05,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 307 proven. 110 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 04:42:06,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148611082] [2021-12-17 04:42:06,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148611082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908030389] [2021-12-17 04:42:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:06,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:06,076 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 04:42:06,080 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 04:42:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:42:06,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-17 04:42:06,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:06,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908030389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:06,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:06,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:42:06,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304446877] [2021-12-17 04:42:06,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:06,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:06,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:06,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:06,819 INFO L87 Difference]: Start difference. First operand 76816 states and 88765 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:10,017 INFO L93 Difference]: Finished difference Result 169362 states and 195258 transitions. [2021-12-17 04:42:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 398 [2021-12-17 04:42:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:10,129 INFO L225 Difference]: With dead ends: 169362 [2021-12-17 04:42:10,129 INFO L226 Difference]: Without dead ends: 90177 [2021-12-17 04:42:10,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 397 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 04:42:10,155 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 859 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:10,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1888 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2401 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:42:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90177 states. [2021-12-17 04:42:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90177 to 82296. [2021-12-17 04:42:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82296 states, 82295 states have (on average 1.1472385928671243) internal successors, (94412), 82295 states have internal predecessors, (94412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82296 states to 82296 states and 94412 transitions. [2021-12-17 04:42:11,172 INFO L78 Accepts]: Start accepts. Automaton has 82296 states and 94412 transitions. Word has length 398 [2021-12-17 04:42:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:11,173 INFO L470 AbstractCegarLoop]: Abstraction has 82296 states and 94412 transitions. [2021-12-17 04:42:11,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 82296 states and 94412 transitions. [2021-12-17 04:42:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-12-17 04:42:11,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:11,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 04:42:11,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:42:11,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 04:42:11,400 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1070237854, now seen corresponding path program 1 times [2021-12-17 04:42:11,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768460821] [2021-12-17 04:42:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:11,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 322 proven. 110 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 04:42:11,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768460821] [2021-12-17 04:42:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768460821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:42:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588672020] [2021-12-17 04:42:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:11,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:11,891 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 04:42:11,959 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 04:42:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:12,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:42:12,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:42:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:42:12,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:42:12,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588672020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:12,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:42:12,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:42:12,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49804216] [2021-12-17 04:42:12,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:12,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:12,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:42:12,759 INFO L87 Difference]: Start difference. First operand 82296 states and 94412 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:16,302 INFO L93 Difference]: Finished difference Result 173242 states and 200706 transitions. [2021-12-17 04:42:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 473 [2021-12-17 04:42:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:16,409 INFO L225 Difference]: With dead ends: 173242 [2021-12-17 04:42:16,409 INFO L226 Difference]: Without dead ends: 91735 [2021-12-17 04:42:16,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 472 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 04:42:16,429 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 1138 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:16,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 409 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:42:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91735 states. [2021-12-17 04:42:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91735 to 90948. [2021-12-17 04:42:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90948 states, 90947 states have (on average 1.150318317261702) internal successors, (104618), 90947 states have internal predecessors, (104618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90948 states to 90948 states and 104618 transitions. [2021-12-17 04:42:17,572 INFO L78 Accepts]: Start accepts. Automaton has 90948 states and 104618 transitions. Word has length 473 [2021-12-17 04:42:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 90948 states and 104618 transitions. [2021-12-17 04:42:17,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 90948 states and 104618 transitions. [2021-12-17 04:42:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-12-17 04:42:17,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:17,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:17,600 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 04:42:17,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:42:17,784 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2122528164, now seen corresponding path program 1 times [2021-12-17 04:42:17,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839437858] [2021-12-17 04:42:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:17,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-17 04:42:17,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839437858] [2021-12-17 04:42:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839437858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:17,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:17,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:17,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944058748] [2021-12-17 04:42:17,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:17,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:17,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:17,979 INFO L87 Difference]: Start difference. First operand 90948 states and 104618 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:21,640 INFO L93 Difference]: Finished difference Result 203940 states and 237309 transitions. [2021-12-17 04:42:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 487 [2021-12-17 04:42:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:22,010 INFO L225 Difference]: With dead ends: 203940 [2021-12-17 04:42:22,011 INFO L226 Difference]: Without dead ends: 113781 [2021-12-17 04:42:22,045 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 04:42:22,046 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 807 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:22,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 877 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:42:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113781 states. [2021-12-17 04:42:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113781 to 112190. [2021-12-17 04:42:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112190 states, 112189 states have (on average 1.1510397632566474) internal successors, (129134), 112189 states have internal predecessors, (129134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112190 states to 112190 states and 129134 transitions. [2021-12-17 04:42:23,524 INFO L78 Accepts]: Start accepts. Automaton has 112190 states and 129134 transitions. Word has length 487 [2021-12-17 04:42:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:23,525 INFO L470 AbstractCegarLoop]: Abstraction has 112190 states and 129134 transitions. [2021-12-17 04:42:23,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 112190 states and 129134 transitions. [2021-12-17 04:42:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-17 04:42:23,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:23,537 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:42:23,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -169297695, now seen corresponding path program 1 times [2021-12-17 04:42:23,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79037926] [2021-12-17 04:42:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:23,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:23,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:23,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79037926] [2021-12-17 04:42:23,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79037926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:23,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:23,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:23,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025995624] [2021-12-17 04:42:23,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:23,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:23,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:23,713 INFO L87 Difference]: Start difference. First operand 112190 states and 129134 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:27,552 INFO L93 Difference]: Finished difference Result 244056 states and 282746 transitions. [2021-12-17 04:42:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 491 [2021-12-17 04:42:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:27,704 INFO L225 Difference]: With dead ends: 244056 [2021-12-17 04:42:27,704 INFO L226 Difference]: Without dead ends: 131079 [2021-12-17 04:42:27,759 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 04:42:27,759 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 730 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:27,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1843 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:42:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131079 states. [2021-12-17 04:42:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131079 to 131062. [2021-12-17 04:42:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131062 states, 131061 states have (on average 1.124415348578143) internal successors, (147367), 131061 states have internal predecessors, (147367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131062 states to 131062 states and 147367 transitions. [2021-12-17 04:42:29,369 INFO L78 Accepts]: Start accepts. Automaton has 131062 states and 147367 transitions. Word has length 491 [2021-12-17 04:42:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:29,369 INFO L470 AbstractCegarLoop]: Abstraction has 131062 states and 147367 transitions. [2021-12-17 04:42:29,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 131062 states and 147367 transitions. [2021-12-17 04:42:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-17 04:42:29,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:29,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:29,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:42:29,380 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1723753840, now seen corresponding path program 1 times [2021-12-17 04:42:29,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:29,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292354531] [2021-12-17 04:42:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:29,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 04:42:29,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:29,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292354531] [2021-12-17 04:42:29,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292354531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:29,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:29,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:29,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827672143] [2021-12-17 04:42:29,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:29,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:42:29,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:29,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:42:29,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:29,960 INFO L87 Difference]: Start difference. First operand 131062 states and 147367 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:35,940 INFO L93 Difference]: Finished difference Result 370805 states and 421124 transitions. [2021-12-17 04:42:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 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 491 [2021-12-17 04:42:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:36,278 INFO L225 Difference]: With dead ends: 370805 [2021-12-17 04:42:36,279 INFO L226 Difference]: Without dead ends: 240532 [2021-12-17 04:42:36,355 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 04:42:36,355 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1375 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 5587 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 6230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 5587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:36,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 972 Invalid, 6230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 5587 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 04:42:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240532 states. [2021-12-17 04:42:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240532 to 240511. [2021-12-17 04:42:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240511 states, 240510 states have (on average 1.1247349382562055) internal successors, (270510), 240510 states have internal predecessors, (270510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240511 states to 240511 states and 270510 transitions. [2021-12-17 04:42:39,916 INFO L78 Accepts]: Start accepts. Automaton has 240511 states and 270510 transitions. Word has length 491 [2021-12-17 04:42:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:39,916 INFO L470 AbstractCegarLoop]: Abstraction has 240511 states and 270510 transitions. [2021-12-17 04:42:39,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 240511 states and 270510 transitions. [2021-12-17 04:42:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-17 04:42:39,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:39,941 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:39,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:42:39,941 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1326877998, now seen corresponding path program 1 times [2021-12-17 04:42:39,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:39,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959851312] [2021-12-17 04:42:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:39,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-17 04:42:40,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:40,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959851312] [2021-12-17 04:42:40,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959851312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:40,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:40,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:40,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747260225] [2021-12-17 04:42:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:40,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:40,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:40,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:40,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:40,229 INFO L87 Difference]: Start difference. First operand 240511 states and 270510 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:44,259 INFO L93 Difference]: Finished difference Result 481810 states and 541820 transitions. [2021-12-17 04:42:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 516 [2021-12-17 04:42:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:44,590 INFO L225 Difference]: With dead ends: 481810 [2021-12-17 04:42:44,590 INFO L226 Difference]: Without dead ends: 242088 [2021-12-17 04:42:44,707 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 04:42:44,708 INFO L933 BasicCegarLoop]: 1360 mSDtfsCounter, 923 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:44,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1441 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:42:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242088 states. [2021-12-17 04:42:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242088 to 240496. [2021-12-17 04:42:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240496 states, 240495 states have (on average 1.0927628433023555) internal successors, (262804), 240495 states have internal predecessors, (262804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240496 states to 240496 states and 262804 transitions. [2021-12-17 04:42:48,014 INFO L78 Accepts]: Start accepts. Automaton has 240496 states and 262804 transitions. Word has length 516 [2021-12-17 04:42:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:42:48,015 INFO L470 AbstractCegarLoop]: Abstraction has 240496 states and 262804 transitions. [2021-12-17 04:42:48,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 240496 states and 262804 transitions. [2021-12-17 04:42:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-12-17 04:42:48,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:48,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:42:48,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:42:48,032 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1692421564, now seen corresponding path program 1 times [2021-12-17 04:42:48,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:48,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881599897] [2021-12-17 04:42:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:48,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:42:48,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881599897] [2021-12-17 04:42:48,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881599897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:48,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:48,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:42:48,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447195130] [2021-12-17 04:42:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:48,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:48,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:48,779 INFO L87 Difference]: Start difference. First operand 240496 states and 262804 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:53,117 INFO L93 Difference]: Finished difference Result 479415 states and 523832 transitions. [2021-12-17 04:42:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:42:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 546 [2021-12-17 04:42:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:53,528 INFO L225 Difference]: With dead ends: 479415 [2021-12-17 04:42:53,529 INFO L226 Difference]: Without dead ends: 239708 [2021-12-17 04:42:53,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 04:42:53,667 INFO L933 BasicCegarLoop]: 1325 mSDtfsCounter, 1002 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:53,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 1398 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:42:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239708 states.