./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.09.cil-1.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/systemc/token_ring.09.cil-1.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 834ccc2d6e5ce947bfece9c1e11f57131346eaac8927553a9495d7568350ac6e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:53:20,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:53:20,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:53:20,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:53:20,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:53:20,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:53:20,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:53:20,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:53:20,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:53:20,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:53:20,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:53:20,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:53:20,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:53:20,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:53:20,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:53:20,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:53:20,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:53:20,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:53:20,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:53:20,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:53:20,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:53:20,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:53:20,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:53:20,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:53:20,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:53:20,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:53:20,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:53:20,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:53:20,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:53:20,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:53:20,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:53:20,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:53:20,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:53:20,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:53:20,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:53:20,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:53:20,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:53:20,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:53:20,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:53:20,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:53:20,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:53:20,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:53:20,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:53:20,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:53:20,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:53:20,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:53:20,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:53:20,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:53:20,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:53:20,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:53:20,988 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:53:20,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:53:20,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:53:20,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:53:20,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:53:20,990 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:53:20,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:53:20,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:53:20,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:53:20,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:53:20,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:53:20,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:53:20,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:53:20,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:53:20,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:53:20,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:53:20,991 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:53:20,991 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:53:20,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:53:20,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:53:20,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834ccc2d6e5ce947bfece9c1e11f57131346eaac8927553a9495d7568350ac6e [2021-12-14 14:53:21,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:53:21,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:53:21,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:53:21,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:53:21,224 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:53:21,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2021-12-14 14:53:21,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5386a8d5a/d193a4e578ea4de7a0d93aae5197ec05/FLAGb863a8aba [2021-12-14 14:53:21,612 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:53:21,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2021-12-14 14:53:21,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5386a8d5a/d193a4e578ea4de7a0d93aae5197ec05/FLAGb863a8aba [2021-12-14 14:53:22,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5386a8d5a/d193a4e578ea4de7a0d93aae5197ec05 [2021-12-14 14:53:22,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:53:22,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:53:22,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:53:22,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:53:22,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:53:22,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58806cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22, skipping insertion in model container [2021-12-14 14:53:22,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:53:22,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:53:22,197 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/systemc/token_ring.09.cil-1.c[671,684] [2021-12-14 14:53:22,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:53:22,288 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:53:22,295 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/systemc/token_ring.09.cil-1.c[671,684] [2021-12-14 14:53:22,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:53:22,372 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:53:22,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22 WrapperNode [2021-12-14 14:53:22,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:53:22,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:53:22,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:53:22,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:53:22,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,442 INFO L137 Inliner]: procedures = 46, calls = 58, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 679 [2021-12-14 14:53:22,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:53:22,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:53:22,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:53:22,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:53:22,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:53:22,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:53:22,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:53:22,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:53:22,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (1/1) ... [2021-12-14 14:53:22,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:53:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:22,519 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 14:53:22,527 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 14:53:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:53:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 14:53:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 14:53:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 14:53:22,553 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 14:53:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 14:53:22,553 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 14:53:22,554 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 14:53:22,554 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 14:53:22,554 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 14:53:22,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 14:53:22,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:53:22,555 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 14:53:22,555 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 14:53:22,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:53:22,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:53:22,658 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:53:22,661 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:53:23,139 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:53:23,154 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:53:23,155 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-14 14:53:23,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:53:23 BoogieIcfgContainer [2021-12-14 14:53:23,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:53:23,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:53:23,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:53:23,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:53:23,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:53:22" (1/3) ... [2021-12-14 14:53:23,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2a18fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:53:23, skipping insertion in model container [2021-12-14 14:53:23,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:22" (2/3) ... [2021-12-14 14:53:23,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2a18fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:53:23, skipping insertion in model container [2021-12-14 14:53:23,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:53:23" (3/3) ... [2021-12-14 14:53:23,201 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-1.c [2021-12-14 14:53:23,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:53:23,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:53:23,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:53:23,254 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 14:53:23,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:53:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 276 states have (on average 1.6521739130434783) internal successors, (456), 278 states have internal predecessors, (456), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-14 14:53:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:23,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:23,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:23,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1628036766, now seen corresponding path program 1 times [2021-12-14 14:53:23,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:23,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360880518] [2021-12-14 14:53:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:23,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:23,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:23,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:23,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:23,717 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 14:53:23,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360880518] [2021-12-14 14:53:23,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360880518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:23,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:23,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:53:23,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568219154] [2021-12-14 14:53:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:23,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:23,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:53:23,759 INFO L87 Difference]: Start difference. First operand has 307 states, 276 states have (on average 1.6521739130434783) internal successors, (456), 278 states have internal predecessors, (456), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:24,734 INFO L93 Difference]: Finished difference Result 710 states and 1171 transitions. [2021-12-14 14:53:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:24,761 INFO L225 Difference]: With dead ends: 710 [2021-12-14 14:53:24,762 INFO L226 Difference]: Without dead ends: 411 [2021-12-14 14:53:24,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:24,778 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 803 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:24,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 858 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 14:53:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-12-14 14:53:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 302. [2021-12-14 14:53:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.5625) internal successors, (425), 273 states have internal predecessors, (425), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-14 14:53:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 471 transitions. [2021-12-14 14:53:24,869 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 471 transitions. Word has length 144 [2021-12-14 14:53:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:24,870 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 471 transitions. [2021-12-14 14:53:24,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 471 transitions. [2021-12-14 14:53:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:24,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:24,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:24,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:53:24,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2122057956, now seen corresponding path program 1 times [2021-12-14 14:53:24,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:24,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784732078] [2021-12-14 14:53:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:24,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:24,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:24,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:25,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:25,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:25,057 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 14:53:25,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784732078] [2021-12-14 14:53:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784732078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:25,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:25,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:53:25,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486945576] [2021-12-14 14:53:25,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:25,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:53:25,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:53:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:53:25,061 INFO L87 Difference]: Start difference. First operand 302 states and 471 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:26,681 INFO L93 Difference]: Finished difference Result 1102 states and 1758 transitions. [2021-12-14 14:53:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:53:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:26,685 INFO L225 Difference]: With dead ends: 1102 [2021-12-14 14:53:26,685 INFO L226 Difference]: Without dead ends: 817 [2021-12-14 14:53:26,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:53:26,687 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1208 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:26,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1366 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 14:53:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-14 14:53:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 600. [2021-12-14 14:53:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 545 states have (on average 1.5743119266055046) internal successors, (858), 547 states have internal predecessors, (858), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (44), 41 states have call predecessors, (44), 41 states have call successors, (44) [2021-12-14 14:53:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 943 transitions. [2021-12-14 14:53:26,740 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 943 transitions. Word has length 144 [2021-12-14 14:53:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 943 transitions. [2021-12-14 14:53:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 943 transitions. [2021-12-14 14:53:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:26,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:26,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:26,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:53:26,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash -379054432, now seen corresponding path program 1 times [2021-12-14 14:53:26,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:26,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526390682] [2021-12-14 14:53:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:26,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:26,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:26,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:26,854 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 14:53:26,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:26,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526390682] [2021-12-14 14:53:26,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526390682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:26,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:26,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:26,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703019976] [2021-12-14 14:53:26,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:26,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:26,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:26,857 INFO L87 Difference]: Start difference. First operand 600 states and 943 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:29,139 INFO L93 Difference]: Finished difference Result 1820 states and 2905 transitions. [2021-12-14 14:53:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:29,146 INFO L225 Difference]: With dead ends: 1820 [2021-12-14 14:53:29,146 INFO L226 Difference]: Without dead ends: 1237 [2021-12-14 14:53:29,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:29,149 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1225 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:29,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 2339 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 14:53:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-12-14 14:53:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 877. [2021-12-14 14:53:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 797 states have (on average 1.5671267252195733) internal successors, (1249), 800 states have internal predecessors, (1249), 59 states have call successors, (59), 18 states have call predecessors, (59), 20 states have return successors, (64), 60 states have call predecessors, (64), 59 states have call successors, (64) [2021-12-14 14:53:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1372 transitions. [2021-12-14 14:53:29,201 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1372 transitions. Word has length 144 [2021-12-14 14:53:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:29,203 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1372 transitions. [2021-12-14 14:53:29,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1372 transitions. [2021-12-14 14:53:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:29,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:29,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:29,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:53:29,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:29,213 INFO L85 PathProgramCache]: Analyzing trace with hash 567983454, now seen corresponding path program 1 times [2021-12-14 14:53:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:29,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447120249] [2021-12-14 14:53:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:29,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,349 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 14:53:29,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:29,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447120249] [2021-12-14 14:53:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447120249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:29,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:29,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:29,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101027698] [2021-12-14 14:53:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:29,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:29,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:29,352 INFO L87 Difference]: Start difference. First operand 877 states and 1372 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:31,457 INFO L93 Difference]: Finished difference Result 2878 states and 4582 transitions. [2021-12-14 14:53:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:31,471 INFO L225 Difference]: With dead ends: 2878 [2021-12-14 14:53:31,471 INFO L226 Difference]: Without dead ends: 2018 [2021-12-14 14:53:31,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:31,483 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 1222 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:31,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 2327 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 14:53:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-12-14 14:53:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1432. [2021-12-14 14:53:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1302 states have (on average 1.5606758832565284) internal successors, (2032), 1307 states have internal predecessors, (2032), 95 states have call successors, (95), 30 states have call predecessors, (95), 34 states have return successors, (108), 98 states have call predecessors, (108), 95 states have call successors, (108) [2021-12-14 14:53:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2235 transitions. [2021-12-14 14:53:31,580 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2235 transitions. Word has length 144 [2021-12-14 14:53:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:31,581 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2235 transitions. [2021-12-14 14:53:31,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2235 transitions. [2021-12-14 14:53:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:31,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:31,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:31,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:53:31,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1429817056, now seen corresponding path program 1 times [2021-12-14 14:53:31,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:31,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846133289] [2021-12-14 14:53:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:31,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,727 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 14:53:31,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846133289] [2021-12-14 14:53:31,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846133289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:31,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:31,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:31,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755042272] [2021-12-14 14:53:31,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:31,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:31,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:31,730 INFO L87 Difference]: Start difference. First operand 1432 states and 2235 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:33,941 INFO L93 Difference]: Finished difference Result 4913 states and 7789 transitions. [2021-12-14 14:53:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:33,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:33,953 INFO L225 Difference]: With dead ends: 4913 [2021-12-14 14:53:33,953 INFO L226 Difference]: Without dead ends: 3498 [2021-12-14 14:53:33,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:33,956 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1218 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:33,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 2323 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 14:53:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-12-14 14:53:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2543. [2021-12-14 14:53:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2313 states have (on average 1.5555555555555556) internal successors, (3598), 2322 states have internal predecessors, (3598), 167 states have call successors, (167), 54 states have call predecessors, (167), 62 states have return successors, (202), 174 states have call predecessors, (202), 167 states have call successors, (202) [2021-12-14 14:53:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3967 transitions. [2021-12-14 14:53:34,062 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3967 transitions. Word has length 144 [2021-12-14 14:53:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:34,063 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 3967 transitions. [2021-12-14 14:53:34,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3967 transitions. [2021-12-14 14:53:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:34,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:34,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:34,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:53:34,066 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash -620591842, now seen corresponding path program 1 times [2021-12-14 14:53:34,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253597442] [2021-12-14 14:53:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:34,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,183 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 14:53:34,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253597442] [2021-12-14 14:53:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253597442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:34,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:34,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:34,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011191220] [2021-12-14 14:53:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:34,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:34,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:34,185 INFO L87 Difference]: Start difference. First operand 2543 states and 3967 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:36,379 INFO L93 Difference]: Finished difference Result 8982 states and 14219 transitions. [2021-12-14 14:53:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:36,405 INFO L225 Difference]: With dead ends: 8982 [2021-12-14 14:53:36,405 INFO L226 Difference]: Without dead ends: 6456 [2021-12-14 14:53:36,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:36,414 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1217 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:36,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 2317 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 14:53:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2021-12-14 14:53:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 4770. [2021-12-14 14:53:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4340 states have (on average 1.552073732718894) internal successors, (6736), 4357 states have internal predecessors, (6736), 311 states have call successors, (311), 102 states have call predecessors, (311), 118 states have return successors, (408), 326 states have call predecessors, (408), 311 states have call successors, (408) [2021-12-14 14:53:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 7455 transitions. [2021-12-14 14:53:36,673 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 7455 transitions. Word has length 144 [2021-12-14 14:53:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:36,674 INFO L470 AbstractCegarLoop]: Abstraction has 4770 states and 7455 transitions. [2021-12-14 14:53:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 7455 transitions. [2021-12-14 14:53:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:36,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:36,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:36,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:53:36,678 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash -132544736, now seen corresponding path program 1 times [2021-12-14 14:53:36,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:36,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99711788] [2021-12-14 14:53:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:36,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:36,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:36,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:36,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:36,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:36,784 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 14:53:36,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:36,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99711788] [2021-12-14 14:53:36,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99711788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:36,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:36,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:36,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003045764] [2021-12-14 14:53:36,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:36,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:36,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:36,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:36,787 INFO L87 Difference]: Start difference. First operand 4770 states and 7455 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:39,131 INFO L93 Difference]: Finished difference Result 17104 states and 27109 transitions. [2021-12-14 14:53:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:39,189 INFO L225 Difference]: With dead ends: 17104 [2021-12-14 14:53:39,189 INFO L226 Difference]: Without dead ends: 12351 [2021-12-14 14:53:39,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:39,204 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 1299 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:39,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 1616 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 14:53:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12351 states. [2021-12-14 14:53:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12351 to 9254. [2021-12-14 14:53:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9254 states, 8424 states have (on average 1.550807217473884) internal successors, (13064), 8457 states have internal predecessors, (13064), 599 states have call successors, (599), 198 states have call predecessors, (599), 230 states have return successors, (874), 630 states have call predecessors, (874), 599 states have call successors, (874) [2021-12-14 14:53:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9254 states to 9254 states and 14537 transitions. [2021-12-14 14:53:39,625 INFO L78 Accepts]: Start accepts. Automaton has 9254 states and 14537 transitions. Word has length 144 [2021-12-14 14:53:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:39,625 INFO L470 AbstractCegarLoop]: Abstraction has 9254 states and 14537 transitions. [2021-12-14 14:53:39,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 9254 states and 14537 transitions. [2021-12-14 14:53:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:39,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:39,632 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:39,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:53:39,633 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1414717022, now seen corresponding path program 1 times [2021-12-14 14:53:39,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:39,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549333180] [2021-12-14 14:53:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:39,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:39,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:39,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:39,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:39,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:39,725 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 14:53:39,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:39,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549333180] [2021-12-14 14:53:39,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549333180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:39,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:39,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:39,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138607778] [2021-12-14 14:53:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:39,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:39,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:39,747 INFO L87 Difference]: Start difference. First operand 9254 states and 14537 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:42,516 INFO L93 Difference]: Finished difference Result 33382 states and 53145 transitions. [2021-12-14 14:53:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:42,601 INFO L225 Difference]: With dead ends: 33382 [2021-12-14 14:53:42,601 INFO L226 Difference]: Without dead ends: 24145 [2021-12-14 14:53:42,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:42,631 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1211 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2304 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:42,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 2304 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 14:53:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24145 states. [2021-12-14 14:53:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24145 to 18251. [2021-12-14 14:53:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 16621 states have (on average 1.5499669093315684) internal successors, (25762), 16686 states have internal predecessors, (25762), 1175 states have call successors, (1175), 390 states have call predecessors, (1175), 454 states have return successors, (1968), 1238 states have call predecessors, (1968), 1175 states have call successors, (1968) [2021-12-14 14:53:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 28905 transitions. [2021-12-14 14:53:43,648 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 28905 transitions. Word has length 144 [2021-12-14 14:53:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:43,649 INFO L470 AbstractCegarLoop]: Abstraction has 18251 states and 28905 transitions. [2021-12-14 14:53:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 28905 transitions. [2021-12-14 14:53:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:43,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:43,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:43,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:53:43,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1037774560, now seen corresponding path program 1 times [2021-12-14 14:53:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:43,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267128207] [2021-12-14 14:53:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:43,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,795 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 14:53:43,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:43,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267128207] [2021-12-14 14:53:43,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267128207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:43,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:43,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:43,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018890901] [2021-12-14 14:53:43,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:43,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:43,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:43,798 INFO L87 Difference]: Start difference. First operand 18251 states and 28905 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:47,561 INFO L93 Difference]: Finished difference Result 65937 states and 105815 transitions. [2021-12-14 14:53:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:47,746 INFO L225 Difference]: With dead ends: 65937 [2021-12-14 14:53:47,746 INFO L226 Difference]: Without dead ends: 47703 [2021-12-14 14:53:47,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:47,814 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 1210 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:47,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 2299 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 14:53:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47703 states. [2021-12-14 14:53:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47703 to 36308. [2021-12-14 14:53:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 33078 states have (on average 1.5494286232541266) internal successors, (51252), 33207 states have internal predecessors, (51252), 2327 states have call successors, (2327), 774 states have call predecessors, (2327), 902 states have return successors, (4642), 2454 states have call predecessors, (4642), 2327 states have call successors, (4642) [2021-12-14 14:53:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 58221 transitions. [2021-12-14 14:53:49,698 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 58221 transitions. Word has length 144 [2021-12-14 14:53:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:49,698 INFO L470 AbstractCegarLoop]: Abstraction has 36308 states and 58221 transitions. [2021-12-14 14:53:49,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 58221 transitions. [2021-12-14 14:53:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:53:49,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:49,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:53:49,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:53:49,718 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -684228126, now seen corresponding path program 1 times [2021-12-14 14:53:49,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:49,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542285119] [2021-12-14 14:53:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:49,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:49,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:53:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:49,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:49,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:53:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:53:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:49,827 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 14:53:49,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:49,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542285119] [2021-12-14 14:53:49,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542285119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:49,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:49,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:49,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324322856] [2021-12-14 14:53:49,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:49,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:49,829 INFO L87 Difference]: Start difference. First operand 36308 states and 58221 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:55,729 INFO L93 Difference]: Finished difference Result 131048 states and 213005 transitions. [2021-12-14 14:53:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:53:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:56,101 INFO L225 Difference]: With dead ends: 131048 [2021-12-14 14:53:56,101 INFO L226 Difference]: Without dead ends: 94757 [2021-12-14 14:53:56,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:56,203 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1209 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:56,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 2294 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 14:53:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94757 states. [2021-12-14 14:53:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94757 to 72549. [2021-12-14 14:53:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72549 states, 66119 states have (on average 1.5490554908573935) internal successors, (102422), 66376 states have internal predecessors, (102422), 4631 states have call successors, (4631), 1542 states have call predecessors, (4631), 1798 states have return successors, (11448), 4886 states have call predecessors, (11448), 4631 states have call successors, (11448) [2021-12-14 14:54:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72549 states to 72549 states and 118501 transitions. [2021-12-14 14:54:00,126 INFO L78 Accepts]: Start accepts. Automaton has 72549 states and 118501 transitions. Word has length 144 [2021-12-14 14:54:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:54:00,126 INFO L470 AbstractCegarLoop]: Abstraction has 72549 states and 118501 transitions. [2021-12-14 14:54:00,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:54:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 72549 states and 118501 transitions. [2021-12-14 14:54:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-14 14:54:00,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:54:00,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:54:00,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:54:00,167 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:54:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:54:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1016871264, now seen corresponding path program 1 times [2021-12-14 14:54:00,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:54:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583186330] [2021-12-14 14:54:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:54:00,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:54:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:54:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 14:54:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:54:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:00,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 14:54:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:00,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 14:54:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:00,281 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 14:54:00,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:54:00,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583186330] [2021-12-14 14:54:00,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583186330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:54:00,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:54:00,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:54:00,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741312524] [2021-12-14 14:54:00,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:54:00,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:54:00,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:54:00,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:54:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:54:00,283 INFO L87 Difference]: Start difference. First operand 72549 states and 118501 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:54:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:54:13,421 INFO L93 Difference]: Finished difference Result 295831 states and 485765 transitions. [2021-12-14 14:54:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:54:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2021-12-14 14:54:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:54:14,635 INFO L225 Difference]: With dead ends: 295831 [2021-12-14 14:54:14,635 INFO L226 Difference]: Without dead ends: 223299 [2021-12-14 14:54:15,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:54:15,040 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 1577 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:54:15,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 2279 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2327 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 14:54:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223299 states.