./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label02.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/Problem19_label02.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 fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:16:15,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:16:15,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:16:15,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:16:15,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:16:15,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:16:15,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:16:15,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:16:15,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:16:15,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:16:15,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:16:15,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:16:15,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:16:15,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:16:15,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:16:15,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:16:15,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:16:15,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:16:15,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:16:15,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:16:15,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:16:15,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:16:15,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:16:15,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:16:15,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:16:15,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:16:15,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:16:15,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:16:15,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:16:15,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:16:15,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:16:15,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:16:15,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:16:15,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:16:15,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:16:15,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:16:15,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:16:15,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:16:15,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:16:15,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:16:15,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:16:15,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:16:15,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:16:15,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:16:15,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:16:15,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:16:15,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:16:15,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:16:15,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:16:15,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:16:15,717 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:16:15,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:16:15,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:16:15,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:16:15,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:16:15,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:16:15,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:16:15,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:16:15,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:16:15,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:16:15,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:16:15,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:16:15,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:16:15,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:16:15,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:16:15,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:16:15,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:16:15,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:16:15,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:16:15,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:16:15,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:16:15,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:16:15,721 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:16:15,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:16:15,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:16:15,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:16:15,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 [2021-12-17 05:16:15,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:16:15,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:16:15,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:16:15,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:16:15,968 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:16:15,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-12-17 05:16:16,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cdbe0650/df2ac143b8d347699a41d087d7518196/FLAG57872b52a [2021-12-17 05:16:16,623 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:16:16,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-12-17 05:16:16,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cdbe0650/df2ac143b8d347699a41d087d7518196/FLAG57872b52a [2021-12-17 05:16:16,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cdbe0650/df2ac143b8d347699a41d087d7518196 [2021-12-17 05:16:16,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:16:16,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:16:16,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:16:16,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:16:16,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:16:16,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:16:16" (1/1) ... [2021-12-17 05:16:16,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e892b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:16, skipping insertion in model container [2021-12-17 05:16:16,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:16:16" (1/1) ... [2021-12-17 05:16:16,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:16:16,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:16:17,119 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/Problem19_label02.c[8512,8525] [2021-12-17 05:16:17,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:16:17,992 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:16:18,017 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/Problem19_label02.c[8512,8525] [2021-12-17 05:16:18,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:16:18,614 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:16:18,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18 WrapperNode [2021-12-17 05:16:18,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:16:18,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:16:18,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:16:18,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:16:18,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:18,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:19,283 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-17 05:16:19,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:16:19,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:16:19,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:16:19,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:16:19,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:19,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:19,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:19,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:19,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:19,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:20,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:20,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:16:20,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:16:20,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:16:20,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:16:20,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (1/1) ... [2021-12-17 05:16:20,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:16:20,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:16:20,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 05:16:20,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 05:16:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:16:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:16:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:16:20,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:16:20,247 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:16:20,248 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:16:26,062 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:16:26,082 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:16:26,082 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:16:26,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:16:26 BoogieIcfgContainer [2021-12-17 05:16:26,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:16:26,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:16:26,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:16:26,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:16:26,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:16:16" (1/3) ... [2021-12-17 05:16:26,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26de35b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:16:26, skipping insertion in model container [2021-12-17 05:16:26,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:16:18" (2/3) ... [2021-12-17 05:16:26,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26de35b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:16:26, skipping insertion in model container [2021-12-17 05:16:26,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:16:26" (3/3) ... [2021-12-17 05:16:26,094 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label02.c [2021-12-17 05:16:26,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:16:26,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:16:26,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:16:26,141 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 05:16:26,142 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:16:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 05:16:26,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:16:26,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:16:26,260 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:16:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:16:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-12-17 05:16:26,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:16:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657347047] [2021-12-17 05:16:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:16:26,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:16:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:16:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:16:26,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:16:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657347047] [2021-12-17 05:16:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657347047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:16:26,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:16:26,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:16:26,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707204161] [2021-12-17 05:16:26,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:16:26,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:16:26,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:16:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:16:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:16:26,482 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:16:32,549 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2021-12-17 05:16:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:16:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-17 05:16:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:16:32,575 INFO L225 Difference]: With dead ends: 4975 [2021-12-17 05:16:32,577 INFO L226 Difference]: Without dead ends: 3163 [2021-12-17 05:16:32,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:16:32,586 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1480 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:16:32,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 05:16:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-12-17 05:16:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2021-12-17 05:16:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2021-12-17 05:16:32,728 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 66 [2021-12-17 05:16:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:16:32,729 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2021-12-17 05:16:32,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2021-12-17 05:16:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 05:16:32,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:16:32,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:16:32,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:16:32,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:16:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:16:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash -202345467, now seen corresponding path program 1 times [2021-12-17 05:16:32,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:16:32,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564471844] [2021-12-17 05:16:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:16:32,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:16:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:16:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:16:32,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:16:32,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564471844] [2021-12-17 05:16:32,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564471844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:16:32,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:16:32,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:16:32,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289638750] [2021-12-17 05:16:32,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:16:32,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:16:32,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:16:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:16:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:16:32,861 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:16:38,448 INFO L93 Difference]: Finished difference Result 9175 states and 14984 transitions. [2021-12-17 05:16:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:16:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-12-17 05:16:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:16:38,469 INFO L225 Difference]: With dead ends: 9175 [2021-12-17 05:16:38,470 INFO L226 Difference]: Without dead ends: 6054 [2021-12-17 05:16:38,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:16:38,474 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1776 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:16:38,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1617 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4196 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 05:16:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2021-12-17 05:16:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 6040. [2021-12-17 05:16:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 6039 states have (on average 1.4207650273224044) internal successors, (8580), 6039 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 8580 transitions. [2021-12-17 05:16:38,571 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 8580 transitions. Word has length 137 [2021-12-17 05:16:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:16:38,574 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 8580 transitions. [2021-12-17 05:16:38,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 8580 transitions. [2021-12-17 05:16:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-17 05:16:38,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:16:38,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:16:38,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:16:38,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:16:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:16:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2020164790, now seen corresponding path program 1 times [2021-12-17 05:16:38,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:16:38,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176440658] [2021-12-17 05:16:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:16:38,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:16:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:16:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:16:38,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:16:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176440658] [2021-12-17 05:16:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176440658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:16:38,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:16:38,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:16:38,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540877451] [2021-12-17 05:16:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:16:38,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:16:38,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:16:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:16:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:16:38,721 INFO L87 Difference]: Start difference. First operand 6040 states and 8580 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:16:48,207 INFO L93 Difference]: Finished difference Result 20364 states and 28349 transitions. [2021-12-17 05:16:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:16:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-12-17 05:16:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:16:48,247 INFO L225 Difference]: With dead ends: 20364 [2021-12-17 05:16:48,248 INFO L226 Difference]: Without dead ends: 14326 [2021-12-17 05:16:48,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 05:16:48,259 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 4032 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 9665 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4032 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 10959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 9665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:16:48,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4032 Valid, 2178 Invalid, 10959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 9665 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-12-17 05:16:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14326 states. [2021-12-17 05:16:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14326 to 14285. [2021-12-17 05:16:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14285 states, 14284 states have (on average 1.2220666479977598) internal successors, (17456), 14284 states have internal predecessors, (17456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 17456 transitions. [2021-12-17 05:16:48,506 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 17456 transitions. Word has length 148 [2021-12-17 05:16:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:16:48,507 INFO L470 AbstractCegarLoop]: Abstraction has 14285 states and 17456 transitions. [2021-12-17 05:16:48,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 17456 transitions. [2021-12-17 05:16:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-17 05:16:48,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:16:48,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:16:48,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:16:48,511 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:16:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:16:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash -379973805, now seen corresponding path program 1 times [2021-12-17 05:16:48,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:16:48,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449945348] [2021-12-17 05:16:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:16:48,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:16:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:16:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:16:48,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:16:48,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449945348] [2021-12-17 05:16:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449945348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:16:48,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:16:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:16:48,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501632285] [2021-12-17 05:16:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:16:48,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:16:48,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:16:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:16:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:16:48,736 INFO L87 Difference]: Start difference. First operand 14285 states and 17456 transitions. Second operand has 4 states, 4 states have (on average 75.25) 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 05:16:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:16:54,147 INFO L93 Difference]: Finished difference Result 25869 states and 32193 transitions. [2021-12-17 05:16:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:16:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) 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 301 [2021-12-17 05:16:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:16:54,181 INFO L225 Difference]: With dead ends: 25869 [2021-12-17 05:16:54,181 INFO L226 Difference]: Without dead ends: 14285 [2021-12-17 05:16:54,194 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 05:16:54,195 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:16:54,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1955 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 05:16:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14285 states. [2021-12-17 05:16:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14285 to 14285. [2021-12-17 05:16:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14285 states, 14284 states have (on average 1.2211565387846541) internal successors, (17443), 14284 states have internal predecessors, (17443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:16:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 17443 transitions. [2021-12-17 05:16:54,394 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 17443 transitions. Word has length 301 [2021-12-17 05:16:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:16:54,395 INFO L470 AbstractCegarLoop]: Abstraction has 14285 states and 17443 transitions. [2021-12-17 05:16:54,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) 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 05:16:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 17443 transitions. [2021-12-17 05:16:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2021-12-17 05:16:54,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:16:54,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:16:54,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:16:54,402 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:16:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:16:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash 827914636, now seen corresponding path program 1 times [2021-12-17 05:16:54,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:16:54,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954074623] [2021-12-17 05:16:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:16:54,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:16:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:16:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:16:54,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:16:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954074623] [2021-12-17 05:16:54,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954074623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:16:54,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:16:54,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:16:54,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933481131] [2021-12-17 05:16:54,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:16:54,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:16:54,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:16:54,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:16:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:16:54,621 INFO L87 Difference]: Start difference. First operand 14285 states and 17443 transitions. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:00,153 INFO L93 Difference]: Finished difference Result 28670 states and 36725 transitions. [2021-12-17 05:17:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:17:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 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 553 [2021-12-17 05:17:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:00,186 INFO L225 Difference]: With dead ends: 28670 [2021-12-17 05:17:00,186 INFO L226 Difference]: Without dead ends: 17117 [2021-12-17 05:17:00,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:00,196 INFO L933 BasicCegarLoop]: 3073 mSDtfsCounter, 1428 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 5806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:00,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1428 Valid, 3252 Invalid, 5806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 05:17:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17117 states. [2021-12-17 05:17:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17117 to 17050. [2021-12-17 05:17:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 17049 states have (on average 1.2225937005102938) internal successors, (20844), 17049 states have internal predecessors, (20844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 20844 transitions. [2021-12-17 05:17:00,395 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 20844 transitions. Word has length 553 [2021-12-17 05:17:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:00,397 INFO L470 AbstractCegarLoop]: Abstraction has 17050 states and 20844 transitions. [2021-12-17 05:17:00,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 20844 transitions. [2021-12-17 05:17:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-17 05:17:00,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:00,412 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:17:00,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 05:17:00,412 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 49262056, now seen corresponding path program 1 times [2021-12-17 05:17:00,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:00,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175888012] [2021-12-17 05:17:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:00,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-17 05:17:00,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:00,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175888012] [2021-12-17 05:17:00,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175888012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:17:00,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:17:00,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:17:00,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585580074] [2021-12-17 05:17:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:17:00,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:17:00,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:17:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:17:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:00,656 INFO L87 Difference]: Start difference. First operand 17050 states and 20844 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:07,210 INFO L93 Difference]: Finished difference Result 45220 states and 56430 transitions. [2021-12-17 05:17:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:17:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 621 [2021-12-17 05:17:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:07,271 INFO L225 Difference]: With dead ends: 45220 [2021-12-17 05:17:07,271 INFO L226 Difference]: Without dead ends: 30902 [2021-12-17 05:17:07,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:07,293 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 2113 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:07,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 994 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-17 05:17:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30902 states. [2021-12-17 05:17:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30902 to 30899. [2021-12-17 05:17:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30899 states, 30898 states have (on average 1.205579649168231) internal successors, (37250), 30898 states have internal predecessors, (37250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30899 states to 30899 states and 37250 transitions. [2021-12-17 05:17:07,610 INFO L78 Accepts]: Start accepts. Automaton has 30899 states and 37250 transitions. Word has length 621 [2021-12-17 05:17:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:07,611 INFO L470 AbstractCegarLoop]: Abstraction has 30899 states and 37250 transitions. [2021-12-17 05:17:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30899 states and 37250 transitions. [2021-12-17 05:17:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2021-12-17 05:17:07,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:07,617 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:17:07,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:17:07,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash 703861188, now seen corresponding path program 1 times [2021-12-17 05:17:07,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:07,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869427915] [2021-12-17 05:17:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:07,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-17 05:17:07,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:07,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869427915] [2021-12-17 05:17:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869427915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:17:07,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:17:07,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:17:07,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491171864] [2021-12-17 05:17:07,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:17:07,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:17:07,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:17:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:17:07,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:07,829 INFO L87 Difference]: Start difference. First operand 30899 states and 37250 transitions. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:14,431 INFO L93 Difference]: Finished difference Result 70128 states and 86490 transitions. [2021-12-17 05:17:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:17:14,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 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 765 [2021-12-17 05:17:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:14,487 INFO L225 Difference]: With dead ends: 70128 [2021-12-17 05:17:14,487 INFO L226 Difference]: Without dead ends: 41961 [2021-12-17 05:17:14,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:14,514 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 1410 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 5099 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 5099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:14,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 3374 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 5099 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-17 05:17:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41961 states. [2021-12-17 05:17:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41961 to 41873. [2021-12-17 05:17:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41873 states, 41872 states have (on average 1.1846102407336645) internal successors, (49602), 41872 states have internal predecessors, (49602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41873 states to 41873 states and 49602 transitions. [2021-12-17 05:17:14,917 INFO L78 Accepts]: Start accepts. Automaton has 41873 states and 49602 transitions. Word has length 765 [2021-12-17 05:17:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:14,918 INFO L470 AbstractCegarLoop]: Abstraction has 41873 states and 49602 transitions. [2021-12-17 05:17:14,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 41873 states and 49602 transitions. [2021-12-17 05:17:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-12-17 05:17:14,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:14,924 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:17:14,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:17:14,925 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash -534372599, now seen corresponding path program 1 times [2021-12-17 05:17:14,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:14,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271652556] [2021-12-17 05:17:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:14,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 149 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:17:15,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271652556] [2021-12-17 05:17:15,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271652556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:17:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320413680] [2021-12-17 05:17:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:15,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:17:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:17:15,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:17:15,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 05:17:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:17:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:17:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-17 05:17:16,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:17:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320413680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:17:16,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:17:16,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:17:16,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740715454] [2021-12-17 05:17:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:17:16,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:17:16,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:17:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:17:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:17:16,351 INFO L87 Difference]: Start difference. First operand 41873 states and 49602 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:22,527 INFO L93 Difference]: Finished difference Result 92060 states and 111190 transitions. [2021-12-17 05:17:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:17:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 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 772 [2021-12-17 05:17:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:22,606 INFO L225 Difference]: With dead ends: 92060 [2021-12-17 05:17:22,606 INFO L226 Difference]: Without dead ends: 52919 [2021-12-17 05:17:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:17:22,630 INFO L933 BasicCegarLoop]: 3068 mSDtfsCounter, 1420 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4987 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 5993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 4987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:22,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 3243 Invalid, 5993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 4987 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 05:17:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52919 states. [2021-12-17 05:17:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52919 to 52803. [2021-12-17 05:17:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52803 states, 52802 states have (on average 1.1731373811598045) internal successors, (61944), 52802 states have internal predecessors, (61944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52803 states to 52803 states and 61944 transitions. [2021-12-17 05:17:23,131 INFO L78 Accepts]: Start accepts. Automaton has 52803 states and 61944 transitions. Word has length 772 [2021-12-17 05:17:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:23,132 INFO L470 AbstractCegarLoop]: Abstraction has 52803 states and 61944 transitions. [2021-12-17 05:17:23,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 52803 states and 61944 transitions. [2021-12-17 05:17:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2021-12-17 05:17:23,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:23,144 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:17:23,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 05:17:23,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:17:23,348 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash 445409118, now seen corresponding path program 1 times [2021-12-17 05:17:23,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:23,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848123725] [2021-12-17 05:17:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:23,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-17 05:17:23,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848123725] [2021-12-17 05:17:23,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848123725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:17:23,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:17:23,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:17:23,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578001638] [2021-12-17 05:17:23,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:17:23,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:17:23,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:17:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:17:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:17:23,607 INFO L87 Difference]: Start difference. First operand 52803 states and 61944 transitions. Second operand has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:33,765 INFO L93 Difference]: Finished difference Result 176840 states and 211330 transitions. [2021-12-17 05:17:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:17:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 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 973 [2021-12-17 05:17:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:33,909 INFO L225 Difference]: With dead ends: 176840 [2021-12-17 05:17:33,910 INFO L226 Difference]: Without dead ends: 126769 [2021-12-17 05:17:33,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:17:33,953 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 3390 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 8746 mSolverCounterSat, 3036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 11782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3036 IncrementalHoareTripleChecker+Valid, 8746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:33,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3390 Valid, 1223 Invalid, 11782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3036 Valid, 8746 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-12-17 05:17:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126769 states. [2021-12-17 05:17:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126769 to 126624. [2021-12-17 05:17:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126624 states, 126623 states have (on average 1.1490961357731218) internal successors, (145502), 126623 states have internal predecessors, (145502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126624 states to 126624 states and 145502 transitions. [2021-12-17 05:17:35,306 INFO L78 Accepts]: Start accepts. Automaton has 126624 states and 145502 transitions. Word has length 973 [2021-12-17 05:17:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:35,307 INFO L470 AbstractCegarLoop]: Abstraction has 126624 states and 145502 transitions. [2021-12-17 05:17:35,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 126624 states and 145502 transitions. [2021-12-17 05:17:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2021-12-17 05:17:35,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:35,320 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:17:35,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:17:35,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1949210563, now seen corresponding path program 1 times [2021-12-17 05:17:35,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496678137] [2021-12-17 05:17:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:35,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 649 proven. 196 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-12-17 05:17:36,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496678137] [2021-12-17 05:17:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496678137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:17:36,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387239917] [2021-12-17 05:17:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:36,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:17:36,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:17:36,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:17:36,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 05:17:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:17:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:17:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2021-12-17 05:17:37,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:17:37,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387239917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:17:37,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:17:37,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:17:37,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735861131] [2021-12-17 05:17:37,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:17:37,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:17:37,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:17:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:17:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:17:37,484 INFO L87 Difference]: Start difference. First operand 126624 states and 145502 transitions. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:44,618 INFO L93 Difference]: Finished difference Result 302439 states and 353243 transitions. [2021-12-17 05:17:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:17:44,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 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 1023 [2021-12-17 05:17:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:44,850 INFO L225 Difference]: With dead ends: 302439 [2021-12-17 05:17:44,850 INFO L226 Difference]: Without dead ends: 178547 [2021-12-17 05:17:44,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 1022 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:17:44,876 INFO L933 BasicCegarLoop]: 2417 mSDtfsCounter, 1589 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 5183 mSolverCounterSat, 1029 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 6212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1029 IncrementalHoareTripleChecker+Valid, 5183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:44,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 2526 Invalid, 6212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1029 Valid, 5183 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-17 05:17:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178547 states. [2021-12-17 05:17:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178547 to 175777. [2021-12-17 05:17:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175777 states, 175776 states have (on average 1.1654492080830148) internal successors, (204858), 175776 states have internal predecessors, (204858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175777 states to 175777 states and 204858 transitions. [2021-12-17 05:17:46,966 INFO L78 Accepts]: Start accepts. Automaton has 175777 states and 204858 transitions. Word has length 1023 [2021-12-17 05:17:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:46,987 INFO L470 AbstractCegarLoop]: Abstraction has 175777 states and 204858 transitions. [2021-12-17 05:17:46,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 175777 states and 204858 transitions. [2021-12-17 05:17:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2021-12-17 05:17:47,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:47,018 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:17:47,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 05:17:47,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 05:17:47,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1081932580, now seen corresponding path program 1 times [2021-12-17 05:17:47,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:47,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050199747] [2021-12-17 05:17:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:47,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-12-17 05:17:47,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:47,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050199747] [2021-12-17 05:17:47,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050199747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:17:47,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:17:47,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:17:47,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599560728] [2021-12-17 05:17:47,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:17:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:17:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:17:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:17:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:47,628 INFO L87 Difference]: Start difference. First operand 175777 states and 204858 transitions. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:17:54,892 INFO L93 Difference]: Finished difference Result 468954 states and 551375 transitions. [2021-12-17 05:17:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:17:54,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 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 1062 [2021-12-17 05:17:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:17:55,324 INFO L225 Difference]: With dead ends: 468954 [2021-12-17 05:17:55,325 INFO L226 Difference]: Without dead ends: 295909 [2021-12-17 05:17:55,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:17:55,390 INFO L933 BasicCegarLoop]: 3093 mSDtfsCounter, 1354 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 5767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:17:55,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 3290 Invalid, 5767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 4607 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 05:17:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295909 states. [2021-12-17 05:17:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295909 to 295895. [2021-12-17 05:17:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295895 states, 295894 states have (on average 1.117224411444639) internal successors, (330580), 295894 states have internal predecessors, (330580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295895 states to 295895 states and 330580 transitions. [2021-12-17 05:17:59,058 INFO L78 Accepts]: Start accepts. Automaton has 295895 states and 330580 transitions. Word has length 1062 [2021-12-17 05:17:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:17:59,058 INFO L470 AbstractCegarLoop]: Abstraction has 295895 states and 330580 transitions. [2021-12-17 05:17:59,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:17:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 295895 states and 330580 transitions. [2021-12-17 05:17:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2021-12-17 05:17:59,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:17:59,076 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:17:59,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 05:17:59,076 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:17:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:17:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 380885665, now seen corresponding path program 1 times [2021-12-17 05:17:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:17:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178963733] [2021-12-17 05:17:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:59,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:17:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 828 proven. 196 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-12-17 05:17:59,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:17:59,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178963733] [2021-12-17 05:17:59,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178963733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:17:59,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048775092] [2021-12-17 05:17:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:17:59,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:17:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:17:59,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:17:59,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 05:17:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:17:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:17:59,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:18:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 1051 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-12-17 05:18:00,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:18:00,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048775092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:18:00,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:18:00,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:18:00,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770675030] [2021-12-17 05:18:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:18:00,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:18:00,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:18:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:18:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:18:00,929 INFO L87 Difference]: Start difference. First operand 295895 states and 330580 transitions. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:18:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:18:08,449 INFO L93 Difference]: Finished difference Result 699599 states and 790553 transitions. [2021-12-17 05:18:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:18:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 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 1113 [2021-12-17 05:18:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:18:09,235 INFO L225 Difference]: With dead ends: 699599 [2021-12-17 05:18:09,235 INFO L226 Difference]: Without dead ends: 390047 [2021-12-17 05:18:09,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:18:09,333 INFO L933 BasicCegarLoop]: 2613 mSDtfsCounter, 1544 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 2105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 5902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2105 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:18:09,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 2707 Invalid, 5902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2105 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 05:18:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390047 states. [2021-12-17 05:18:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390047 to 376384. [2021-12-17 05:18:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376384 states, 376383 states have (on average 1.1126698070848047) internal successors, (418790), 376383 states have internal predecessors, (418790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:18:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376384 states to 376384 states and 418790 transitions. [2021-12-17 05:18:13,945 INFO L78 Accepts]: Start accepts. Automaton has 376384 states and 418790 transitions. Word has length 1113 [2021-12-17 05:18:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:18:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 376384 states and 418790 transitions. [2021-12-17 05:18:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:18:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 376384 states and 418790 transitions. [2021-12-17 05:18:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2021-12-17 05:18:13,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:18:13,963 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:18:13,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 05:18:14,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:18:14,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:18:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:18:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2086193835, now seen corresponding path program 1 times [2021-12-17 05:18:14,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:18:14,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487030811] [2021-12-17 05:18:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:18:14,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:18:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:18:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 1044 proven. 539 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-17 05:18:14,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:18:14,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487030811] [2021-12-17 05:18:14,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487030811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:18:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334783319] [2021-12-17 05:18:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:18:14,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:18:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:18:14,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 05:18:14,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 05:18:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:18:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:18:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:18:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 1217 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-12-17 05:18:16,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:18:16,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334783319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:18:16,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:18:16,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 05:18:16,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783773066] [2021-12-17 05:18:16,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:18:16,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:18:16,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:18:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:18:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:18:16,440 INFO L87 Difference]: Start difference. First operand 376384 states and 418790 transitions. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:18:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:18:23,897 INFO L93 Difference]: Finished difference Result 853791 states and 951494 transitions. [2021-12-17 05:18:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:18:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 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 1182 [2021-12-17 05:18:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:18:24,650 INFO L225 Difference]: With dead ends: 853791 [2021-12-17 05:18:24,650 INFO L226 Difference]: Without dead ends: 480139 [2021-12-17 05:18:24,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:18:24,775 INFO L933 BasicCegarLoop]: 2793 mSDtfsCounter, 1448 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 3752 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 5186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 3752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:18:24,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 2936 Invalid, 5186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 3752 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 05:18:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480139 states. [2021-12-17 05:18:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480139 to 474662. [2021-12-17 05:18:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474662 states, 474661 states have (on average 1.106966866879731) internal successors, (525434), 474661 states have internal predecessors, (525434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:18:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474662 states to 474662 states and 525434 transitions. [2021-12-17 05:18:31,471 INFO L78 Accepts]: Start accepts. Automaton has 474662 states and 525434 transitions. Word has length 1182 [2021-12-17 05:18:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:18:31,472 INFO L470 AbstractCegarLoop]: Abstraction has 474662 states and 525434 transitions. [2021-12-17 05:18:31,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:18:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 474662 states and 525434 transitions. [2021-12-17 05:18:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1221 [2021-12-17 05:18:31,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:18:31,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 05:18:31,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 05:18:31,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:18:31,701 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:18:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:18:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash 262927371, now seen corresponding path program 1 times [2021-12-17 05:18:31,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:18:31,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112336533] [2021-12-17 05:18:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:18:31,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:18:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:18:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1087 backedges. 791 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-17 05:18:31,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:18:31,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112336533] [2021-12-17 05:18:31,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112336533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:18:31,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:18:31,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:18:31,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386782778] [2021-12-17 05:18:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:18:31,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:18:31,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:18:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:18:31,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:18:31,991 INFO L87 Difference]: Start difference. First operand 474662 states and 525434 transitions. Second operand has 3 states, 3 states have (on average 308.6666666666667) internal successors, (926), 2 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)