./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.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 dd1724e619d2e8fc18a4dc8aa6c726656a51fc7e14f993d511c4c773ed4748f3 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:59:18,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:59:18,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:59:18,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:59:18,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:59:18,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:59:18,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:59:18,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:59:18,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:59:18,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:59:18,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:59:18,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:59:18,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:59:18,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:59:18,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:59:18,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:59:18,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:59:18,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:59:18,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:59:18,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:59:18,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:59:18,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:59:18,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:59:18,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:59:18,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:59:18,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:59:18,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:59:18,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:59:18,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:59:18,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:59:18,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:59:18,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:59:18,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:59:18,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:59:18,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:59:18,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:59:18,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:59:18,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:59:18,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:59:18,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:59:18,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:59:18,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:59:19,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:59:19,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:59:19,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:59:19,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:59:19,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:59:19,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:59:19,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:59:19,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:59:19,004 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:59:19,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:59:19,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:59:19,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:59:19,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:59:19,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:59:19,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:59:19,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:59:19,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:59:19,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:59:19,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:59:19,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:59:19,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:59:19,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:59:19,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:59:19,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:59:19,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:59:19,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:59:19,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:59:19,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:59:19,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:59:19,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:59:19,009 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:59:19,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:59:19,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:59:19,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:59:19,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd1724e619d2e8fc18a4dc8aa6c726656a51fc7e14f993d511c4c773ed4748f3 [2021-12-14 14:59:19,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:59:19,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:59:19,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:59:19,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:59:19,213 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:59:19,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c [2021-12-14 14:59:19,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/764ebf18d/f006fcb526d24d98baf7fd99f0b8ebf4/FLAG6ad34d51a [2021-12-14 14:59:19,637 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:59:19,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c [2021-12-14 14:59:19,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/764ebf18d/f006fcb526d24d98baf7fd99f0b8ebf4/FLAG6ad34d51a [2021-12-14 14:59:19,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/764ebf18d/f006fcb526d24d98baf7fd99f0b8ebf4 [2021-12-14 14:59:19,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:59:19,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:59:19,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:59:19,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:59:19,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:59:19,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fe2354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19, skipping insertion in model container [2021-12-14 14:59:19,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:59:19,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:59:19,873 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/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c[17005,17018] [2021-12-14 14:59:19,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:59:19,880 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:59:19,922 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/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c[17005,17018] [2021-12-14 14:59:19,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:59:19,939 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:59:19,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19 WrapperNode [2021-12-14 14:59:19,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:59:19,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:59:19,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:59:19,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:59:19,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,979 INFO L137 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 460 [2021-12-14 14:59:19,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:59:19,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:59:19,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:59:19,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:59:19,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:19,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:20,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:20,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:20,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:59:20,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:59:20,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:59:20,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:59:20,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (1/1) ... [2021-12-14 14:59:20,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:59:20,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:59:20,040 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) [2021-12-14 14:59:20,073 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 [2021-12-14 14:59:20,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:59:20,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:59:20,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:59:20,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:59:20,163 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:59:20,164 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:59:20,624 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:59:20,631 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:59:20,633 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:59:20,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:59:20 BoogieIcfgContainer [2021-12-14 14:59:20,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:59:20,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:59:20,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:59:20,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:59:20,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:59:19" (1/3) ... [2021-12-14 14:59:20,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e092d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:59:20, skipping insertion in model container [2021-12-14 14:59:20,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:19" (2/3) ... [2021-12-14 14:59:20,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e092d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:59:20, skipping insertion in model container [2021-12-14 14:59:20,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:59:20" (3/3) ... [2021-12-14 14:59:20,654 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c [2021-12-14 14:59:20,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:59:20,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:59:20,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:59:20,712 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 [2021-12-14 14:59:20,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:59:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.717241379310345) internal successors, (249), 146 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 14:59:20,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:20,739 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] [2021-12-14 14:59:20,740 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1143199986, now seen corresponding path program 1 times [2021-12-14 14:59:20,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984216032] [2021-12-14 14:59:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:20,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:20,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984216032] [2021-12-14 14:59:20,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984216032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:20,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:20,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:59:20,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623535557] [2021-12-14 14:59:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:59:21,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:59:21,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:59:21,028 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.717241379310345) internal successors, (249), 146 states have internal predecessors, (249), 0 states have call successors, (0), 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 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:21,120 INFO L93 Difference]: Finished difference Result 247 states and 411 transitions. [2021-12-14 14:59:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:59:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-14 14:59:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:21,130 INFO L225 Difference]: With dead ends: 247 [2021-12-14 14:59:21,130 INFO L226 Difference]: Without dead ends: 143 [2021-12-14 14:59:21,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:59:21,135 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 3 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:21,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 916 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-14 14:59:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-12-14 14:59:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4154929577464788) internal successors, (201), 142 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 201 transitions. [2021-12-14 14:59:21,166 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 201 transitions. Word has length 38 [2021-12-14 14:59:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:21,166 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 201 transitions. [2021-12-14 14:59:21,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 201 transitions. [2021-12-14 14:59:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 14:59:21,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:21,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:21,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:59:21,169 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1334845828, now seen corresponding path program 1 times [2021-12-14 14:59:21,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:21,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043823229] [2021-12-14 14:59:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:21,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:21,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043823229] [2021-12-14 14:59:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043823229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:21,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:21,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:21,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491364774] [2021-12-14 14:59:21,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:21,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:21,243 INFO L87 Difference]: Start difference. First operand 143 states and 201 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:21,262 INFO L93 Difference]: Finished difference Result 323 states and 489 transitions. [2021-12-14 14:59:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-14 14:59:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:21,264 INFO L225 Difference]: With dead ends: 323 [2021-12-14 14:59:21,264 INFO L226 Difference]: Without dead ends: 227 [2021-12-14 14:59:21,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:21,266 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 137 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:21,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 454 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-14 14:59:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-12-14 14:59:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 333 transitions. [2021-12-14 14:59:21,282 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 333 transitions. Word has length 78 [2021-12-14 14:59:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:21,282 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 333 transitions. [2021-12-14 14:59:21,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 333 transitions. [2021-12-14 14:59:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 14:59:21,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:21,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:21,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:59:21,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:21,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1690434603, now seen corresponding path program 1 times [2021-12-14 14:59:21,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477746949] [2021-12-14 14:59:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:21,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:21,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477746949] [2021-12-14 14:59:21,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477746949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:21,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:21,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439856678] [2021-12-14 14:59:21,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:21,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:21,355 INFO L87 Difference]: Start difference. First operand 225 states and 333 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:21,388 INFO L93 Difference]: Finished difference Result 557 states and 865 transitions. [2021-12-14 14:59:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-14 14:59:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:21,391 INFO L225 Difference]: With dead ends: 557 [2021-12-14 14:59:21,391 INFO L226 Difference]: Without dead ends: 379 [2021-12-14 14:59:21,392 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 [2021-12-14 14:59:21,393 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 132 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:21,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 445 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-14 14:59:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2021-12-14 14:59:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.5319148936170213) internal successors, (576), 376 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 576 transitions. [2021-12-14 14:59:21,417 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 576 transitions. Word has length 79 [2021-12-14 14:59:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:21,417 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 576 transitions. [2021-12-14 14:59:21,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 576 transitions. [2021-12-14 14:59:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 14:59:21,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:21,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:21,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:59:21,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1185859852, now seen corresponding path program 1 times [2021-12-14 14:59:21,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:21,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096251898] [2021-12-14 14:59:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:21,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:21,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096251898] [2021-12-14 14:59:21,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096251898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:21,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:21,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:21,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809145176] [2021-12-14 14:59:21,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:21,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:21,501 INFO L87 Difference]: Start difference. First operand 377 states and 576 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:21,527 INFO L93 Difference]: Finished difference Result 989 states and 1554 transitions. [2021-12-14 14:59:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-14 14:59:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:21,531 INFO L225 Difference]: With dead ends: 989 [2021-12-14 14:59:21,531 INFO L226 Difference]: Without dead ends: 659 [2021-12-14 14:59:21,533 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 [2021-12-14 14:59:21,534 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 127 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:21,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 436 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-12-14 14:59:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 657. [2021-12-14 14:59:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.5548780487804879) internal successors, (1020), 656 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1020 transitions. [2021-12-14 14:59:21,561 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1020 transitions. Word has length 80 [2021-12-14 14:59:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:21,561 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1020 transitions. [2021-12-14 14:59:21,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1020 transitions. [2021-12-14 14:59:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 14:59:21,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:21,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:21,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:59:21,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash 600169947, now seen corresponding path program 1 times [2021-12-14 14:59:21,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442672403] [2021-12-14 14:59:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:21,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:21,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442672403] [2021-12-14 14:59:21,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442672403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:21,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:21,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:21,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685121757] [2021-12-14 14:59:21,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:21,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:21,626 INFO L87 Difference]: Start difference. First operand 657 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:21,659 INFO L93 Difference]: Finished difference Result 1781 states and 2806 transitions. [2021-12-14 14:59:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-14 14:59:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:21,664 INFO L225 Difference]: With dead ends: 1781 [2021-12-14 14:59:21,664 INFO L226 Difference]: Without dead ends: 1171 [2021-12-14 14:59:21,666 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 [2021-12-14 14:59:21,667 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 122 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:21,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 427 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-12-14 14:59:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1169. [2021-12-14 14:59:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.5616438356164384) internal successors, (1824), 1168 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1824 transitions. [2021-12-14 14:59:21,692 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1824 transitions. Word has length 81 [2021-12-14 14:59:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:21,693 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 1824 transitions. [2021-12-14 14:59:21,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1824 transitions. [2021-12-14 14:59:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 14:59:21,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:21,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:21,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:59:21,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1228760164, now seen corresponding path program 1 times [2021-12-14 14:59:21,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:21,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736424753] [2021-12-14 14:59:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:21,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:21,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736424753] [2021-12-14 14:59:21,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736424753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:21,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:21,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:21,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11019560] [2021-12-14 14:59:21,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:21,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:21,733 INFO L87 Difference]: Start difference. First operand 1169 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:21,765 INFO L93 Difference]: Finished difference Result 3221 states and 5058 transitions. [2021-12-14 14:59:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-14 14:59:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:21,772 INFO L225 Difference]: With dead ends: 3221 [2021-12-14 14:59:21,772 INFO L226 Difference]: Without dead ends: 2099 [2021-12-14 14:59:21,774 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 [2021-12-14 14:59:21,775 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 117 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:21,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 418 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-12-14 14:59:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2097. [2021-12-14 14:59:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 1.5572519083969465) internal successors, (3264), 2096 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 3264 transitions. [2021-12-14 14:59:21,829 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 3264 transitions. Word has length 82 [2021-12-14 14:59:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:21,830 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 3264 transitions. [2021-12-14 14:59:21,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 3264 transitions. [2021-12-14 14:59:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 14:59:21,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:21,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:21,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:59:21,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash -991115381, now seen corresponding path program 1 times [2021-12-14 14:59:21,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:21,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923893421] [2021-12-14 14:59:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:21,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:21,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:21,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923893421] [2021-12-14 14:59:21,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923893421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:21,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:21,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:59:21,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787369674] [2021-12-14 14:59:21,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:21,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:59:21,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:21,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:59:21,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:59:21,910 INFO L87 Difference]: Start difference. First operand 2097 states and 3264 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:22,281 INFO L93 Difference]: Finished difference Result 16447 states and 25783 transitions. [2021-12-14 14:59:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 14:59:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-14 14:59:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:22,332 INFO L225 Difference]: With dead ends: 16447 [2021-12-14 14:59:22,332 INFO L226 Difference]: Without dead ends: 14397 [2021-12-14 14:59:22,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:59:22,346 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1801 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:22,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 3241 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:59:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-12-14 14:59:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 4145. [2021-12-14 14:59:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 1.5482625482625483) internal successors, (6416), 4144 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 6416 transitions. [2021-12-14 14:59:22,587 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 6416 transitions. Word has length 83 [2021-12-14 14:59:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:22,588 INFO L470 AbstractCegarLoop]: Abstraction has 4145 states and 6416 transitions. [2021-12-14 14:59:22,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 6416 transitions. [2021-12-14 14:59:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 14:59:22,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:22,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:22,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:59:22,591 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1043128834, now seen corresponding path program 1 times [2021-12-14 14:59:22,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:22,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889762158] [2021-12-14 14:59:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:22,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:22,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:22,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889762158] [2021-12-14 14:59:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889762158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:22,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:59:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832131225] [2021-12-14 14:59:22,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:59:22,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:59:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:59:22,702 INFO L87 Difference]: Start difference. First operand 4145 states and 6416 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:23,381 INFO L93 Difference]: Finished difference Result 26141 states and 40150 transitions. [2021-12-14 14:59:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 14:59:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-14 14:59:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:23,427 INFO L225 Difference]: With dead ends: 26141 [2021-12-14 14:59:23,427 INFO L226 Difference]: Without dead ends: 22043 [2021-12-14 14:59:23,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:59:23,437 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 898 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:23,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1580 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:59:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22043 states. [2021-12-14 14:59:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22043 to 22033. [2021-12-14 14:59:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22033 states, 22032 states have (on average 1.5301379811183733) internal successors, (33712), 22032 states have internal predecessors, (33712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22033 states to 22033 states and 33712 transitions. [2021-12-14 14:59:24,194 INFO L78 Accepts]: Start accepts. Automaton has 22033 states and 33712 transitions. Word has length 84 [2021-12-14 14:59:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:24,195 INFO L470 AbstractCegarLoop]: Abstraction has 22033 states and 33712 transitions. [2021-12-14 14:59:24,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22033 states and 33712 transitions. [2021-12-14 14:59:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 14:59:24,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:24,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:24,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:59:24,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -954880174, now seen corresponding path program 1 times [2021-12-14 14:59:24,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:24,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374929736] [2021-12-14 14:59:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:24,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:24,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374929736] [2021-12-14 14:59:24,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374929736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:24,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:24,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:24,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853491210] [2021-12-14 14:59:24,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:24,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:24,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:24,231 INFO L87 Difference]: Start difference. First operand 22033 states and 33712 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:25,227 INFO L93 Difference]: Finished difference Result 60821 states and 92530 transitions. [2021-12-14 14:59:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-14 14:59:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:25,309 INFO L225 Difference]: With dead ends: 60821 [2021-12-14 14:59:25,310 INFO L226 Difference]: Without dead ends: 38835 [2021-12-14 14:59:25,338 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 [2021-12-14 14:59:25,339 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 139 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:25,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 473 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38835 states. [2021-12-14 14:59:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38835 to 38833. [2021-12-14 14:59:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38833 states, 38832 states have (on average 1.5059744540585085) internal successors, (58480), 38832 states have internal predecessors, (58480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38833 states to 38833 states and 58480 transitions. [2021-12-14 14:59:26,528 INFO L78 Accepts]: Start accepts. Automaton has 38833 states and 58480 transitions. Word has length 85 [2021-12-14 14:59:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:26,529 INFO L470 AbstractCegarLoop]: Abstraction has 38833 states and 58480 transitions. [2021-12-14 14:59:26,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 38833 states and 58480 transitions. [2021-12-14 14:59:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 14:59:26,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:26,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:26,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:59:26,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1112242464, now seen corresponding path program 1 times [2021-12-14 14:59:26,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474202268] [2021-12-14 14:59:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:26,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:26,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474202268] [2021-12-14 14:59:26,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474202268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:26,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:26,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:59:26,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589512509] [2021-12-14 14:59:26,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:26,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:59:26,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:59:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:59:26,603 INFO L87 Difference]: Start difference. First operand 38833 states and 58480 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:28,432 INFO L93 Difference]: Finished difference Result 80691 states and 119985 transitions. [2021-12-14 14:59:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:59:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-14 14:59:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:28,600 INFO L225 Difference]: With dead ends: 80691 [2021-12-14 14:59:28,600 INFO L226 Difference]: Without dead ends: 80689 [2021-12-14 14:59:28,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:59:28,620 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1119 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:28,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 992 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80689 states. [2021-12-14 14:59:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80689 to 41137. [2021-12-14 14:59:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41137 states, 41136 states have (on average 1.4776351614157914) internal successors, (60784), 41136 states have internal predecessors, (60784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41137 states to 41137 states and 60784 transitions. [2021-12-14 14:59:30,282 INFO L78 Accepts]: Start accepts. Automaton has 41137 states and 60784 transitions. Word has length 85 [2021-12-14 14:59:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:30,282 INFO L470 AbstractCegarLoop]: Abstraction has 41137 states and 60784 transitions. [2021-12-14 14:59:30,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 41137 states and 60784 transitions. [2021-12-14 14:59:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 14:59:30,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:30,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:30,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:59:30,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:30,285 INFO L85 PathProgramCache]: Analyzing trace with hash 172356833, now seen corresponding path program 1 times [2021-12-14 14:59:30,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:30,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255128468] [2021-12-14 14:59:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:30,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:30,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:30,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255128468] [2021-12-14 14:59:30,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255128468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:30,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:30,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:30,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385675587] [2021-12-14 14:59:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:30,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:30,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:30,327 INFO L87 Difference]: Start difference. First operand 41137 states and 60784 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:31,847 INFO L93 Difference]: Finished difference Result 100951 states and 149300 transitions. [2021-12-14 14:59:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:31,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-12-14 14:59:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:31,956 INFO L225 Difference]: With dead ends: 100951 [2021-12-14 14:59:31,957 INFO L226 Difference]: Without dead ends: 59861 [2021-12-14 14:59:32,001 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 [2021-12-14 14:59:32,001 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 107 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:32,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 349 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59861 states. [2021-12-14 14:59:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59861 to 59507. [2021-12-14 14:59:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59507 states, 59506 states have (on average 1.4705407858031123) internal successors, (87506), 59506 states have internal predecessors, (87506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59507 states to 59507 states and 87506 transitions. [2021-12-14 14:59:34,041 INFO L78 Accepts]: Start accepts. Automaton has 59507 states and 87506 transitions. Word has length 86 [2021-12-14 14:59:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:34,042 INFO L470 AbstractCegarLoop]: Abstraction has 59507 states and 87506 transitions. [2021-12-14 14:59:34,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:59:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 59507 states and 87506 transitions. [2021-12-14 14:59:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-14 14:59:34,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:34,074 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 14:59:34,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:59:34,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash 182856268, now seen corresponding path program 1 times [2021-12-14 14:59:34,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:34,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581800498] [2021-12-14 14:59:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:34,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:34,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581800498] [2021-12-14 14:59:34,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581800498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:59:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474774873] [2021-12-14 14:59:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:34,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:59:34,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:59:34,268 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) [2021-12-14 14:59:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:59:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 14:59:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:59:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:59:34,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:59:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:59:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474774873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:59:35,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:59:35,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-14 14:59:35,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238830352] [2021-12-14 14:59:35,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:59:35,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 14:59:35,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 14:59:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:59:35,095 INFO L87 Difference]: Start difference. First operand 59507 states and 87506 transitions. Second operand has 14 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)