./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:57:16,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:57:16,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:57:16,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:57:16,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:57:16,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:57:16,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:57:16,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:57:16,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:57:16,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:57:16,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:57:16,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:57:16,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:57:16,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:57:16,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:57:16,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:57:16,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:57:16,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:57:16,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:57:16,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:57:16,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:57:16,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:57:16,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:57:16,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:57:16,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:57:16,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:57:16,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:57:16,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:57:16,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:57:16,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:57:16,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:57:16,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:57:16,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:57:16,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:57:16,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:57:16,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:57:16,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:57:16,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:57:16,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:57:16,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:57:16,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:57:16,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:57:16,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:57:16,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:57:16,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:57:16,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:57:16,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:57:16,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:57:16,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:57:16,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:57:16,885 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:57:16,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:57:16,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:57:16,886 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:57:16,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:57:16,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:57:16,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:57:16,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:57:16,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:57:16,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:57:16,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:57:16,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:57:16,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:57:16,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:57:16,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:57:16,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:57:16,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:57:16,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2021-12-15 13:57:17,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:57:17,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:57:17,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:57:17,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:57:17,113 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:57:17,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2021-12-15 13:57:17,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ae67a7f/f215455382ea4b118905743e85b61846/FLAG316a1f8cd [2021-12-15 13:57:17,492 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:57:17,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2021-12-15 13:57:17,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ae67a7f/f215455382ea4b118905743e85b61846/FLAG316a1f8cd [2021-12-15 13:57:17,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ae67a7f/f215455382ea4b118905743e85b61846 [2021-12-15 13:57:17,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:57:17,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:57:17,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:57:17,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:57:17,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:57:17,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:57:17" (1/1) ... [2021-12-15 13:57:17,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c58fd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:17, skipping insertion in model container [2021-12-15 13:57:17,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:57:17" (1/1) ... [2021-12-15 13:57:17,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:57:17,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:57:18,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:57:18,126 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:57:18,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:57:18,165 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:57:18,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18 WrapperNode [2021-12-15 13:57:18,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:57:18,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:57:18,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:57:18,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:57:18,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,217 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2021-12-15 13:57:18,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:57:18,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:57:18,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:57:18,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:57:18,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:57:18,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:57:18,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:57:18,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:57:18,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (1/1) ... [2021-12-15 13:57:18,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:57:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:18,288 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) [2021-12-15 13:57:18,312 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 [2021-12-15 13:57:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:57:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:57:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:57:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:57:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:57:18,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:57:18,413 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:57:18,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:57:18,597 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:57:18,601 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:57:18,601 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 13:57:18,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:57:18 BoogieIcfgContainer [2021-12-15 13:57:18,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:57:18,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:57:18,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:57:18,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:57:18,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:57:17" (1/3) ... [2021-12-15 13:57:18,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd54cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:57:18, skipping insertion in model container [2021-12-15 13:57:18,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:18" (2/3) ... [2021-12-15 13:57:18,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd54cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:57:18, skipping insertion in model container [2021-12-15 13:57:18,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:57:18" (3/3) ... [2021-12-15 13:57:18,608 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2021-12-15 13:57:18,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:57:18,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-15 13:57:18,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:57:18,664 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-15 13:57:18,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-15 13:57:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:18,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:18,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:18,687 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-15 13:57:18,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:18,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374535808] [2021-12-15 13:57:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:18,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:18,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:18,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374535808] [2021-12-15 13:57:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374535808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:18,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:18,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096849689] [2021-12-15 13:57:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:18,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:18,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:18,883 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:18,921 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-12-15 13:57:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 13:57:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:18,928 INFO L225 Difference]: With dead ends: 76 [2021-12-15 13:57:18,929 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 13:57:18,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:18,935 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:18,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 13:57:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2021-12-15 13:57:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-15 13:57:18,960 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2021-12-15 13:57:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:18,961 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-15 13:57:18,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-15 13:57:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:18,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:18,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:18,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:57:18,965 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-15 13:57:18,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244719288] [2021-12-15 13:57:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:18,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244719288] [2021-12-15 13:57:19,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244719288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:57:19,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666120536] [2021-12-15 13:57:19,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:57:19,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:57:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:19,019 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,050 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-15 13:57:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:57:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 13:57:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,051 INFO L225 Difference]: With dead ends: 41 [2021-12-15 13:57:19,052 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 13:57:19,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:19,054 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 13:57:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-15 13:57:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-15 13:57:19,096 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2021-12-15 13:57:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-15 13:57:19,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-15 13:57:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:19,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:57:19,097 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-15 13:57:19,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636878656] [2021-12-15 13:57:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636878656] [2021-12-15 13:57:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636878656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:19,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456209494] [2021-12-15 13:57:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:19,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,176 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,225 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-12-15 13:57:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 13:57:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,226 INFO L225 Difference]: With dead ends: 73 [2021-12-15 13:57:19,226 INFO L226 Difference]: Without dead ends: 73 [2021-12-15 13:57:19,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:19,227 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-15 13:57:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2021-12-15 13:57:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.5625) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-15 13:57:19,231 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2021-12-15 13:57:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,232 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-15 13:57:19,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-15 13:57:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:57:19,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:57:19,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-15 13:57:19,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230239837] [2021-12-15 13:57:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230239837] [2021-12-15 13:57:19,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230239837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:19,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652146558] [2021-12-15 13:57:19,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:19,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,275 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,295 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-15 13:57:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:57:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,296 INFO L225 Difference]: With dead ends: 42 [2021-12-15 13:57:19,296 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 13:57:19,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,297 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 13:57:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-15 13:57:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.53125) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-15 13:57:19,301 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 9 [2021-12-15 13:57:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,301 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-15 13:57:19,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-15 13:57:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:57:19,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:57:19,302 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-15 13:57:19,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190343149] [2021-12-15 13:57:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190343149] [2021-12-15 13:57:19,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190343149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:19,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25007315] [2021-12-15 13:57:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:19,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,335 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,368 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-15 13:57:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:57:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,369 INFO L225 Difference]: With dead ends: 74 [2021-12-15 13:57:19,369 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 13:57:19,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,370 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 13:57:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-12-15 13:57:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-15 13:57:19,375 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 9 [2021-12-15 13:57:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,375 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-15 13:57:19,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-15 13:57:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:57:19,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 13:57:19,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-15 13:57:19,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595165609] [2021-12-15 13:57:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595165609] [2021-12-15 13:57:19,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595165609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:57:19,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117343226] [2021-12-15 13:57:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:57:19,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:57:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:19,407 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,429 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-12-15 13:57:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:57:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:57:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,433 INFO L225 Difference]: With dead ends: 51 [2021-12-15 13:57:19,433 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 13:57:19,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:19,434 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 13:57:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-15 13:57:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-12-15 13:57:19,444 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 9 [2021-12-15 13:57:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,445 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-12-15 13:57:19,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-12-15 13:57:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:57:19,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 13:57:19,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-15 13:57:19,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187357363] [2021-12-15 13:57:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187357363] [2021-12-15 13:57:19,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187357363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:19,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431379662] [2021-12-15 13:57:19,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:19,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:19,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:19,501 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,554 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-12-15 13:57:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:57:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,555 INFO L225 Difference]: With dead ends: 74 [2021-12-15 13:57:19,556 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 13:57:19,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:57:19,557 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 67 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 13:57:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-12-15 13:57:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-15 13:57:19,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 9 [2021-12-15 13:57:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,566 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-15 13:57:19,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-15 13:57:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:57:19,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 13:57:19,568 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-15 13:57:19,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792578113] [2021-12-15 13:57:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792578113] [2021-12-15 13:57:19,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792578113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:19,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:19,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:19,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008400467] [2021-12-15 13:57:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:19,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,635 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:19,663 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-15 13:57:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:19,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 13:57:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:19,664 INFO L225 Difference]: With dead ends: 52 [2021-12-15 13:57:19,664 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 13:57:19,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:19,665 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:19,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 13:57:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-15 13:57:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-15 13:57:19,669 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2021-12-15 13:57:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:19,669 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-15 13:57:19,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-15 13:57:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:19,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:19,671 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:19,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 13:57:19,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-15 13:57:19,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35431331] [2021-12-15 13:57:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35431331] [2021-12-15 13:57:19,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35431331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929132795] [2021-12-15 13:57:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:19,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:19,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:19,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 13:57:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 13:57:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:19,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:20,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929132795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:20,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:20,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-15 13:57:20,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460549446] [2021-12-15 13:57:20,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:20,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:20,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:20,083 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:20,215 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2021-12-15 13:57:20,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:57:20,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:20,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:20,218 INFO L225 Difference]: With dead ends: 113 [2021-12-15 13:57:20,218 INFO L226 Difference]: Without dead ends: 113 [2021-12-15 13:57:20,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:20,222 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 164 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:20,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 209 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-15 13:57:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2021-12-15 13:57:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-15 13:57:20,238 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2021-12-15 13:57:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:20,238 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-15 13:57:20,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-15 13:57:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:20,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:20,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:20,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 13:57:20,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:20,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2021-12-15 13:57:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:20,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58388351] [2021-12-15 13:57:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:20,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58388351] [2021-12-15 13:57:20,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58388351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:20,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:20,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:20,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568504457] [2021-12-15 13:57:20,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:20,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:20,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:20,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:20,487 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:20,548 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-15 13:57:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:57:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:20,549 INFO L225 Difference]: With dead ends: 46 [2021-12-15 13:57:20,549 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 13:57:20,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:20,552 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:20,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 13:57:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-15 13:57:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-15 13:57:20,563 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 13 [2021-12-15 13:57:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:20,564 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-15 13:57:20,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-15 13:57:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:20,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:20,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:20,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 13:57:20,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2021-12-15 13:57:20,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:20,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157292973] [2021-12-15 13:57:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:20,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157292973] [2021-12-15 13:57:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157292973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:20,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:20,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:57:20,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039655137] [2021-12-15 13:57:20,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:20,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:57:20,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:57:20,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:20,641 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:20,696 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-15 13:57:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:57:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:20,702 INFO L225 Difference]: With dead ends: 49 [2021-12-15 13:57:20,702 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 13:57:20,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:20,703 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:20,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 13:57:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-12-15 13:57:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-15 13:57:20,711 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2021-12-15 13:57:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:20,711 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-15 13:57:20,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-15 13:57:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:20,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:20,712 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:20,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 13:57:20,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-15 13:57:20,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:20,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088242926] [2021-12-15 13:57:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:20,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088242926] [2021-12-15 13:57:20,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088242926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020617658] [2021-12-15 13:57:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:20,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:20,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 13:57:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:57:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:20,907 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020617658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:21,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:21,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-15 13:57:21,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5281682] [2021-12-15 13:57:21,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:21,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 13:57:21,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 13:57:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:21,165 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:21,260 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-12-15 13:57:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:57:21,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:57:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:21,261 INFO L225 Difference]: With dead ends: 88 [2021-12-15 13:57:21,261 INFO L226 Difference]: Without dead ends: 88 [2021-12-15 13:57:21,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:57:21,262 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:21,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 160 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-15 13:57:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 45. [2021-12-15 13:57:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-15 13:57:21,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2021-12-15 13:57:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:21,263 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-15 13:57:21,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-15 13:57:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:57:21,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:21,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:21,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:21,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 13:57:21,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2021-12-15 13:57:21,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:21,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519353144] [2021-12-15 13:57:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:21,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519353144] [2021-12-15 13:57:21,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519353144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:21,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:21,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:57:21,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473307127] [2021-12-15 13:57:21,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:21,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:57:21,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:57:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:57:21,499 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:21,560 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-15 13:57:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:57:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:21,561 INFO L225 Difference]: With dead ends: 45 [2021-12-15 13:57:21,561 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 13:57:21,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:21,561 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:21,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 13:57:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-15 13:57:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-15 13:57:21,576 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2021-12-15 13:57:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:21,576 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-15 13:57:21,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-15 13:57:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:57:21,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:21,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:21,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 13:57:21,577 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2021-12-15 13:57:21,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:21,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759135406] [2021-12-15 13:57:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:21,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759135406] [2021-12-15 13:57:21,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759135406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:21,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:21,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 13:57:21,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845355243] [2021-12-15 13:57:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:21,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:57:21,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:57:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:57:21,691 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:21,768 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-12-15 13:57:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:57:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:57:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:21,768 INFO L225 Difference]: With dead ends: 48 [2021-12-15 13:57:21,769 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 13:57:21,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:57:21,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:21,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 13:57:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-15 13:57:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-15 13:57:21,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2021-12-15 13:57:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:21,771 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-15 13:57:21,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-15 13:57:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 13:57:21,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:21,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:21,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 13:57:21,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2021-12-15 13:57:21,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:21,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887200726] [2021-12-15 13:57:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:21,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:21,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887200726] [2021-12-15 13:57:21,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887200726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:21,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:21,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:21,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138706771] [2021-12-15 13:57:21,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:21,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:21,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:21,883 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:21,897 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-15 13:57:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:21,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 13:57:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:21,898 INFO L225 Difference]: With dead ends: 45 [2021-12-15 13:57:21,898 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 13:57:21,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:21,899 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:21,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 13:57:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-15 13:57:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-15 13:57:21,900 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2021-12-15 13:57:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:21,901 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-15 13:57:21,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-15 13:57:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:57:21,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:21,901 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:21,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 13:57:21,902 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2021-12-15 13:57:21,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:21,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613216179] [2021-12-15 13:57:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:21,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:22,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:22,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613216179] [2021-12-15 13:57:22,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613216179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:22,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:22,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-15 13:57:22,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198785265] [2021-12-15 13:57:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:22,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:22,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:22,009 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:22,120 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-12-15 13:57:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:57:22,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 13:57:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:22,120 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:57:22,121 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:57:22,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:57:22,121 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:22,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 203 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:57:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-12-15 13:57:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-12-15 13:57:22,123 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2021-12-15 13:57:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:22,123 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-12-15 13:57:22,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-12-15 13:57:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:57:22,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:22,124 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:22,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 13:57:22,124 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2021-12-15 13:57:22,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:22,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262748566] [2021-12-15 13:57:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:22,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:22,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262748566] [2021-12-15 13:57:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262748566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:22,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:22,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-15 13:57:22,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884217248] [2021-12-15 13:57:22,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:22,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:22,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:22,204 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:22,356 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-12-15 13:57:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:57:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 13:57:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:22,357 INFO L225 Difference]: With dead ends: 96 [2021-12-15 13:57:22,357 INFO L226 Difference]: Without dead ends: 81 [2021-12-15 13:57:22,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-12-15 13:57:22,357 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:22,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 213 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-15 13:57:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-12-15 13:57:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-12-15 13:57:22,359 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2021-12-15 13:57:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:22,359 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-12-15 13:57:22,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-12-15 13:57:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:57:22,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:22,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:22,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 13:57:22,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2021-12-15 13:57:22,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:22,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435620502] [2021-12-15 13:57:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:22,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:22,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:22,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435620502] [2021-12-15 13:57:22,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435620502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:22,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:22,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-15 13:57:22,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107825224] [2021-12-15 13:57:22,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:22,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 13:57:22,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 13:57:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:22,503 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:22,669 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-12-15 13:57:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 13:57:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 13:57:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:22,670 INFO L225 Difference]: With dead ends: 117 [2021-12-15 13:57:22,670 INFO L226 Difference]: Without dead ends: 106 [2021-12-15 13:57:22,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:57:22,671 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:22,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 188 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-15 13:57:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2021-12-15 13:57:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-12-15 13:57:22,673 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2021-12-15 13:57:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:22,673 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-12-15 13:57:22,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-12-15 13:57:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:57:22,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:22,673 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:22,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 13:57:22,674 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2021-12-15 13:57:22,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:22,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730323923] [2021-12-15 13:57:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:22,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:22,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730323923] [2021-12-15 13:57:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730323923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:22,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:22,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 13:57:22,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873984267] [2021-12-15 13:57:22,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:22,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 13:57:22,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 13:57:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:57:22,811 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:22,927 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2021-12-15 13:57:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 13:57:22,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 13:57:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:22,928 INFO L225 Difference]: With dead ends: 118 [2021-12-15 13:57:22,928 INFO L226 Difference]: Without dead ends: 105 [2021-12-15 13:57:22,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-15 13:57:22,929 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:22,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 179 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-15 13:57:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2021-12-15 13:57:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-12-15 13:57:22,930 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2021-12-15 13:57:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:22,931 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-12-15 13:57:22,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-12-15 13:57:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 13:57:22,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:22,931 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:22,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 13:57:22,931 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2021-12-15 13:57:22,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:22,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085471686] [2021-12-15 13:57:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:22,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:23,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085471686] [2021-12-15 13:57:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085471686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013211793] [2021-12-15 13:57:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:23,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:23,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:23,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 13:57:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:23,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 13:57:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:23,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:23,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 13:57:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:23,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013211793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:23,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:23,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2021-12-15 13:57:23,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176292891] [2021-12-15 13:57:23,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:23,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 13:57:23,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 13:57:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:57:23,385 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:23,683 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-12-15 13:57:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 13:57:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 13:57:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:23,684 INFO L225 Difference]: With dead ends: 101 [2021-12-15 13:57:23,684 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 13:57:23,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-12-15 13:57:23,684 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 238 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:23,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 196 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 13:57:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-12-15 13:57:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-12-15 13:57:23,686 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2021-12-15 13:57:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-12-15 13:57:23,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-12-15 13:57:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 13:57:23,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:23,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:23,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 13:57:23,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:23,895 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2021-12-15 13:57:23,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:23,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540342891] [2021-12-15 13:57:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:23,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:24,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540342891] [2021-12-15 13:57:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540342891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018661450] [2021-12-15 13:57:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:24,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:24,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:24,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 13:57:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:24,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 13:57:24,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:24,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:24,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:24,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:24,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018661450] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:24,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:24,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-15 13:57:24,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505949430] [2021-12-15 13:57:24,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:24,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 13:57:24,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 13:57:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:57:24,439 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:24,737 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-12-15 13:57:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:57:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 13:57:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:24,738 INFO L225 Difference]: With dead ends: 119 [2021-12-15 13:57:24,738 INFO L226 Difference]: Without dead ends: 119 [2021-12-15 13:57:24,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:57:24,738 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 160 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:24,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 334 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-15 13:57:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-12-15 13:57:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.158878504672897) internal successors, (124), 108 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-12-15 13:57:24,741 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2021-12-15 13:57:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:24,741 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-12-15 13:57:24,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-12-15 13:57:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 13:57:24,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:24,741 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:24,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:24,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:24,948 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2021-12-15 13:57:24,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:24,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119938568] [2021-12-15 13:57:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:24,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:25,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119938568] [2021-12-15 13:57:25,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119938568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774532201] [2021-12-15 13:57:25,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:25,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:25,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:25,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:25,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 13:57:25,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:25,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 13:57:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:25,784 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-15 13:57:25,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 14 [2021-12-15 13:57:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:25,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:25,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-15 13:57:25,980 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-15 13:57:25,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-12-15 13:57:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:26,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774532201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:26,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2021-12-15 13:57:26,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024080616] [2021-12-15 13:57:26,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:26,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:57:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:57:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:57:26,131 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:26,928 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2021-12-15 13:57:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 13:57:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 13:57:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:26,931 INFO L225 Difference]: With dead ends: 207 [2021-12-15 13:57:26,931 INFO L226 Difference]: Without dead ends: 183 [2021-12-15 13:57:26,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=459, Invalid=3201, Unknown=0, NotChecked=0, Total=3660 [2021-12-15 13:57:26,933 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 239 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:26,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 431 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 446 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2021-12-15 13:57:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-15 13:57:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 133. [2021-12-15 13:57:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 132 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2021-12-15 13:57:26,936 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 30 [2021-12-15 13:57:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:26,936 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2021-12-15 13:57:26,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2021-12-15 13:57:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 13:57:26,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:26,937 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:26,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 13:57:27,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2021-12-15 13:57:27,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:27,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036776392] [2021-12-15 13:57:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:27,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:27,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036776392] [2021-12-15 13:57:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036776392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563172169] [2021-12-15 13:57:27,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:27,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:27,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:27,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 13:57:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-15 13:57:27,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:27,781 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:27,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-15 13:57:27,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-15 13:57:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:28,454 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 13:57:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 21 [2021-12-15 13:57:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:28,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:29,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:29,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2021-12-15 13:57:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:29,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:29,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 65 [2021-12-15 13:57:29,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:29,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-12-15 13:57:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:29,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563172169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:29,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:29,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 57 [2021-12-15 13:57:29,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383566187] [2021-12-15 13:57:29,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:29,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-15 13:57:29,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-15 13:57:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2962, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 13:57:29,396 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand has 57 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 57 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:29,940 INFO L93 Difference]: Finished difference Result 207 states and 228 transitions. [2021-12-15 13:57:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 13:57:29,941 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 57 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 13:57:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:29,941 INFO L225 Difference]: With dead ends: 207 [2021-12-15 13:57:29,941 INFO L226 Difference]: Without dead ends: 180 [2021-12-15 13:57:29,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=372, Invalid=4740, Unknown=0, NotChecked=0, Total=5112 [2021-12-15 13:57:29,943 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 681 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 393 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2021-12-15 13:57:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-15 13:57:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-12-15 13:57:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.128654970760234) internal successors, (193), 172 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 193 transitions. [2021-12-15 13:57:29,946 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 193 transitions. Word has length 33 [2021-12-15 13:57:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:29,946 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 193 transitions. [2021-12-15 13:57:29,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 57 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 193 transitions. [2021-12-15 13:57:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 13:57:29,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:29,946 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:29,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:30,155 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -740881566, now seen corresponding path program 3 times [2021-12-15 13:57:30,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:30,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819352323] [2021-12-15 13:57:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:30,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:30,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:30,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819352323] [2021-12-15 13:57:30,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819352323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:30,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531221291] [2021-12-15 13:57:30,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:30,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:30,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:30,278 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:30,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 13:57:30,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 13:57:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 13:57:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:30,353 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:30,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:30,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:30,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531221291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:30,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:30,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2021-12-15 13:57:30,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393408056] [2021-12-15 13:57:30,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:30,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:57:30,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:57:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:57:30,885 INFO L87 Difference]: Start difference. First operand 173 states and 193 transitions. Second operand has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:31,298 INFO L93 Difference]: Finished difference Result 226 states and 249 transitions. [2021-12-15 13:57:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 13:57:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 13:57:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:31,299 INFO L225 Difference]: With dead ends: 226 [2021-12-15 13:57:31,300 INFO L226 Difference]: Without dead ends: 226 [2021-12-15 13:57:31,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 13:57:31,300 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 286 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:31,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 441 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-15 13:57:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 205. [2021-12-15 13:57:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 204 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 231 transitions. [2021-12-15 13:57:31,303 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 231 transitions. Word has length 34 [2021-12-15 13:57:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:31,303 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 231 transitions. [2021-12-15 13:57:31,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 231 transitions. [2021-12-15 13:57:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 13:57:31,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:31,304 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:31,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:31,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:31,521 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2021-12-15 13:57:31,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:31,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957448707] [2021-12-15 13:57:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:31,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:31,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:31,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957448707] [2021-12-15 13:57:31,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957448707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:31,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139041777] [2021-12-15 13:57:31,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:31,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:31,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 13:57:31,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 13:57:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:31,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 13:57:31,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:31,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:31,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-15 13:57:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:32,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139041777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:32,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:32,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-15 13:57:32,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481494269] [2021-12-15 13:57:32,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:32,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 13:57:32,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:32,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 13:57:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-12-15 13:57:32,099 INFO L87 Difference]: Start difference. First operand 205 states and 231 transitions. Second operand has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:32,416 INFO L93 Difference]: Finished difference Result 312 states and 352 transitions. [2021-12-15 13:57:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:57:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 13:57:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:32,422 INFO L225 Difference]: With dead ends: 312 [2021-12-15 13:57:32,422 INFO L226 Difference]: Without dead ends: 312 [2021-12-15 13:57:32,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:57:32,423 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 242 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:32,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 501 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-15 13:57:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 253. [2021-12-15 13:57:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.1394422310756973) internal successors, (286), 252 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 286 transitions. [2021-12-15 13:57:32,438 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 286 transitions. Word has length 37 [2021-12-15 13:57:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:32,438 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 286 transitions. [2021-12-15 13:57:32,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 286 transitions. [2021-12-15 13:57:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 13:57:32,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:32,439 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:32,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-15 13:57:32,640 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1745665110, now seen corresponding path program 4 times [2021-12-15 13:57:32,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:32,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098787884] [2021-12-15 13:57:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:32,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:32,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098787884] [2021-12-15 13:57:32,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098787884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391634434] [2021-12-15 13:57:32,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:32,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:32,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:32,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 13:57:32,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:32,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:32,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 13:57:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:32,857 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:32,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:32,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 13:57:33,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:33,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-15 13:57:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:33,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:33,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-15 13:57:33,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 13:57:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:33,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391634434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:33,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:33,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2021-12-15 13:57:33,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234318444] [2021-12-15 13:57:33,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 13:57:33,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 13:57:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 13:57:33,870 INFO L87 Difference]: Start difference. First operand 253 states and 286 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:34,441 INFO L93 Difference]: Finished difference Result 351 states and 389 transitions. [2021-12-15 13:57:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 13:57:34,442 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 13:57:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:34,443 INFO L225 Difference]: With dead ends: 351 [2021-12-15 13:57:34,443 INFO L226 Difference]: Without dead ends: 330 [2021-12-15 13:57:34,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=3725, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 13:57:34,444 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:34,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 706 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 316 Invalid, 0 Unknown, 281 Unchecked, 0.1s Time] [2021-12-15 13:57:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-15 13:57:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 307. [2021-12-15 13:57:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 305 states have (on average 1.1311475409836065) internal successors, (345), 306 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 345 transitions. [2021-12-15 13:57:34,448 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 345 transitions. Word has length 39 [2021-12-15 13:57:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:34,448 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 345 transitions. [2021-12-15 13:57:34,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 345 transitions. [2021-12-15 13:57:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 13:57:34,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:34,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:34,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:34,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 13:57:34,666 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2029158230, now seen corresponding path program 1 times [2021-12-15 13:57:34,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:34,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951171404] [2021-12-15 13:57:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:34,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:34,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951171404] [2021-12-15 13:57:34,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951171404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:34,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052346046] [2021-12-15 13:57:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:34,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:34,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:34,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 13:57:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-15 13:57:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:57:35,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-15 13:57:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:35,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052346046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:35,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:35,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2021-12-15 13:57:35,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824854116] [2021-12-15 13:57:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:35,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 13:57:35,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:35,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 13:57:35,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-15 13:57:35,159 INFO L87 Difference]: Start difference. First operand 307 states and 345 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:35,429 INFO L93 Difference]: Finished difference Result 346 states and 385 transitions. [2021-12-15 13:57:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 13:57:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-15 13:57:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:35,430 INFO L225 Difference]: With dead ends: 346 [2021-12-15 13:57:35,430 INFO L226 Difference]: Without dead ends: 346 [2021-12-15 13:57:35,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:57:35,431 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:35,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 336 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-15 13:57:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 335. [2021-12-15 13:57:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 333 states have (on average 1.1261261261261262) internal successors, (375), 334 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2021-12-15 13:57:35,435 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 42 [2021-12-15 13:57:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:35,435 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2021-12-15 13:57:35,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2021-12-15 13:57:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 13:57:35,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:35,436 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:35,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:35,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 13:57:35,644 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1633943257, now seen corresponding path program 5 times [2021-12-15 13:57:35,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:35,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504201617] [2021-12-15 13:57:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:35,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:35,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:35,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504201617] [2021-12-15 13:57:35,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504201617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:35,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303344521] [2021-12-15 13:57:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:35,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:35,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:35,816 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 13:57:35,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 13:57:35,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:35,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 13:57:35,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:35,912 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:35,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:36,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303344521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:36,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:36,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-15 13:57:36,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89196462] [2021-12-15 13:57:36,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:36,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 13:57:36,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 13:57:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-12-15 13:57:36,481 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:36,960 INFO L93 Difference]: Finished difference Result 447 states and 494 transitions. [2021-12-15 13:57:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 13:57:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-15 13:57:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:36,962 INFO L225 Difference]: With dead ends: 447 [2021-12-15 13:57:36,962 INFO L226 Difference]: Without dead ends: 447 [2021-12-15 13:57:36,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 13:57:36,963 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 335 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:36,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 531 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:57:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-15 13:57:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 415. [2021-12-15 13:57:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 413 states have (on average 1.1331719128329298) internal successors, (468), 414 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 468 transitions. [2021-12-15 13:57:36,975 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 468 transitions. Word has length 43 [2021-12-15 13:57:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:36,976 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 468 transitions. [2021-12-15 13:57:36,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 468 transitions. [2021-12-15 13:57:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 13:57:36,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:36,977 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:37,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:37,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-15 13:57:37,195 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2021-12-15 13:57:37,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883530971] [2021-12-15 13:57:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:37,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:37,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883530971] [2021-12-15 13:57:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883530971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247729927] [2021-12-15 13:57:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:37,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:37,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:37,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 13:57:37,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-15 13:57:37,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:37,453 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:37,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:37,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:37,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:38,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-15 13:57:38,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:38,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:38,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:38,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-15 13:57:38,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:38,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-15 13:57:38,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-15 13:57:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247729927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:38,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2021-12-15 13:57:38,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540905602] [2021-12-15 13:57:38,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:38,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-15 13:57:38,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-15 13:57:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1150, Unknown=1, NotChecked=0, Total=1260 [2021-12-15 13:57:38,980 INFO L87 Difference]: Start difference. First operand 415 states and 468 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:41,700 INFO L93 Difference]: Finished difference Result 796 states and 893 transitions. [2021-12-15 13:57:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 13:57:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 13:57:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:41,702 INFO L225 Difference]: With dead ends: 796 [2021-12-15 13:57:41,702 INFO L226 Difference]: Without dead ends: 767 [2021-12-15 13:57:41,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=329, Invalid=2750, Unknown=1, NotChecked=0, Total=3080 [2021-12-15 13:57:41,703 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:41,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 833 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 321 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2021-12-15 13:57:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-15 13:57:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 683. [2021-12-15 13:57:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 681 states have (on average 1.1395007342143906) internal successors, (776), 682 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 776 transitions. [2021-12-15 13:57:41,715 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 776 transitions. Word has length 45 [2021-12-15 13:57:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:41,715 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 776 transitions. [2021-12-15 13:57:41,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 776 transitions. [2021-12-15 13:57:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 13:57:41,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:41,716 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:41,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-15 13:57:41,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 13:57:41,931 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1868812785, now seen corresponding path program 1 times [2021-12-15 13:57:41,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78996911] [2021-12-15 13:57:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:41,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:41,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:41,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78996911] [2021-12-15 13:57:41,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78996911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:41,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352383783] [2021-12-15 13:57:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:41,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:41,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:42,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:42,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 13:57:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 13:57:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:42,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:42,467 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-15 13:57:42,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 14 [2021-12-15 13:57:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:42,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-15 13:57:42,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-15 13:57:42,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-12-15 13:57:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:42,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352383783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:42,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:42,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 33 [2021-12-15 13:57:42,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230406122] [2021-12-15 13:57:42,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:42,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:57:42,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:57:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:57:42,784 INFO L87 Difference]: Start difference. First operand 683 states and 776 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:43,406 INFO L93 Difference]: Finished difference Result 732 states and 811 transitions. [2021-12-15 13:57:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 13:57:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-15 13:57:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:43,416 INFO L225 Difference]: With dead ends: 732 [2021-12-15 13:57:43,417 INFO L226 Difference]: Without dead ends: 684 [2021-12-15 13:57:43,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=2932, Unknown=0, NotChecked=0, Total=3306 [2021-12-15 13:57:43,418 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:43,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 362 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 286 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2021-12-15 13:57:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-12-15 13:57:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 605. [2021-12-15 13:57:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 603 states have (on average 1.1326699834162521) internal successors, (683), 604 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 683 transitions. [2021-12-15 13:57:43,426 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 683 transitions. Word has length 46 [2021-12-15 13:57:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:43,426 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 683 transitions. [2021-12-15 13:57:43,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 683 transitions. [2021-12-15 13:57:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 13:57:43,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:43,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:43,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:43,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:43,643 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -317766582, now seen corresponding path program 2 times [2021-12-15 13:57:43,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239914307] [2021-12-15 13:57:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:43,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 13:57:43,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239914307] [2021-12-15 13:57:43,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239914307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929842967] [2021-12-15 13:57:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:43,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:43,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:43,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 13:57:43,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:43,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 13:57:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:43,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:44,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:44,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:44,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:44,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-15 13:57:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 13:57:44,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:44,683 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_58| Int) (v_ArrVal_494 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_58| 0) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_494) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_58| 1))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_58|))) is different from false [2021-12-15 13:57:44,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:44,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:44,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 13:57:44,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929842967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:44,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:44,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 32 [2021-12-15 13:57:44,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219305936] [2021-12-15 13:57:44,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:44,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 13:57:44,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 13:57:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=833, Unknown=1, NotChecked=58, Total=992 [2021-12-15 13:57:44,913 INFO L87 Difference]: Start difference. First operand 605 states and 683 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:45,236 INFO L93 Difference]: Finished difference Result 627 states and 694 transitions. [2021-12-15 13:57:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 13:57:45,236 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 13:57:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:45,237 INFO L225 Difference]: With dead ends: 627 [2021-12-15 13:57:45,238 INFO L226 Difference]: Without dead ends: 627 [2021-12-15 13:57:45,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=1388, Unknown=1, NotChecked=76, Total=1640 [2021-12-15 13:57:45,238 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 99 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:45,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 743 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2021-12-15 13:57:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-12-15 13:57:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 514. [2021-12-15 13:57:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 512 states have (on average 1.125) internal successors, (576), 513 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 576 transitions. [2021-12-15 13:57:45,261 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 576 transitions. Word has length 47 [2021-12-15 13:57:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:45,261 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 576 transitions. [2021-12-15 13:57:45,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 576 transitions. [2021-12-15 13:57:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 13:57:45,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:45,262 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:45,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:45,471 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash -317764404, now seen corresponding path program 2 times [2021-12-15 13:57:45,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654899508] [2021-12-15 13:57:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:45,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:45,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654899508] [2021-12-15 13:57:45,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654899508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029848451] [2021-12-15 13:57:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:45,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:45,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:45,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:45,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 13:57:45,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 13:57:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:45,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:46,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:46,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:46,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:57:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:57:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:46,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029848451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:46,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:46,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2021-12-15 13:57:46,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836862051] [2021-12-15 13:57:46,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:46,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 13:57:46,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:46,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 13:57:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 13:57:46,491 INFO L87 Difference]: Start difference. First operand 514 states and 576 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:47,055 INFO L93 Difference]: Finished difference Result 572 states and 626 transitions. [2021-12-15 13:57:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 13:57:47,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 13:57:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:47,056 INFO L225 Difference]: With dead ends: 572 [2021-12-15 13:57:47,056 INFO L226 Difference]: Without dead ends: 514 [2021-12-15 13:57:47,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=2272, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 13:57:47,057 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 239 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:47,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 439 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2021-12-15 13:57:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-15 13:57:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 460. [2021-12-15 13:57:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 458 states have (on average 1.1222707423580787) internal successors, (514), 459 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 514 transitions. [2021-12-15 13:57:47,064 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 514 transitions. Word has length 47 [2021-12-15 13:57:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:47,064 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 514 transitions. [2021-12-15 13:57:47,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 514 transitions. [2021-12-15 13:57:47,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 13:57:47,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:47,066 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:47,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:47,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:47,267 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:47,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash -424649921, now seen corresponding path program 6 times [2021-12-15 13:57:47,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:47,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632914797] [2021-12-15 13:57:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:47,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:47,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632914797] [2021-12-15 13:57:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632914797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992468970] [2021-12-15 13:57:47,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:57:47,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:47,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:47,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 13:57:47,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 13:57:47,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:47,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 13:57:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:47,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:47,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:57:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:57:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:48,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992468970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:48,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:48,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-12-15 13:57:48,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794161038] [2021-12-15 13:57:48,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:48,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:57:48,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:57:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:57:48,006 INFO L87 Difference]: Start difference. First operand 460 states and 514 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:48,806 INFO L93 Difference]: Finished difference Result 819 states and 896 transitions. [2021-12-15 13:57:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 13:57:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 13:57:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:48,808 INFO L225 Difference]: With dead ends: 819 [2021-12-15 13:57:48,808 INFO L226 Difference]: Without dead ends: 793 [2021-12-15 13:57:48,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 13:57:48,809 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 565 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:48,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 959 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 708 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2021-12-15 13:57:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-12-15 13:57:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 554. [2021-12-15 13:57:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 552 states have (on average 1.1195652173913044) internal successors, (618), 553 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 618 transitions. [2021-12-15 13:57:48,816 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 618 transitions. Word has length 48 [2021-12-15 13:57:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:48,816 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 618 transitions. [2021-12-15 13:57:48,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 618 transitions. [2021-12-15 13:57:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 13:57:48,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:48,823 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:48,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-15 13:57:49,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-15 13:57:49,037 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash 589899187, now seen corresponding path program 5 times [2021-12-15 13:57:49,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:49,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958556970] [2021-12-15 13:57:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:49,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:49,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958556970] [2021-12-15 13:57:49,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958556970] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746697269] [2021-12-15 13:57:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:49,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:49,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:49,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 13:57:49,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 13:57:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-15 13:57:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:49,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:49,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:49,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:49,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:50,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746697269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:50,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:50,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2021-12-15 13:57:50,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556976527] [2021-12-15 13:57:50,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:50,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:57:50,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:57:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:57:50,009 INFO L87 Difference]: Start difference. First operand 554 states and 618 transitions. Second operand has 33 states, 32 states have (on average 4.34375) internal successors, (139), 33 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:50,766 INFO L93 Difference]: Finished difference Result 708 states and 779 transitions. [2021-12-15 13:57:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:57:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.34375) internal successors, (139), 33 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 13:57:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:50,768 INFO L225 Difference]: With dead ends: 708 [2021-12-15 13:57:50,768 INFO L226 Difference]: Without dead ends: 708 [2021-12-15 13:57:50,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:57:50,769 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 370 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:50,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 868 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:57:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-15 13:57:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 620. [2021-12-15 13:57:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 618 states have (on average 1.1181229773462784) internal successors, (691), 619 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 691 transitions. [2021-12-15 13:57:50,776 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 691 transitions. Word has length 49 [2021-12-15 13:57:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:50,776 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 691 transitions. [2021-12-15 13:57:50,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.34375) internal successors, (139), 33 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 691 transitions. [2021-12-15 13:57:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 13:57:50,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:50,777 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:50,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:50,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:50,977 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1878539292, now seen corresponding path program 7 times [2021-12-15 13:57:50,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044092780] [2021-12-15 13:57:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:50,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:51,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:51,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044092780] [2021-12-15 13:57:51,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044092780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:51,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463604366] [2021-12-15 13:57:51,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:57:51,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:51,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:51,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:51,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 13:57:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-15 13:57:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:51,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 13:57:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:51,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463604366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:51,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:51,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-15 13:57:51,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978260119] [2021-12-15 13:57:51,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:51,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 13:57:51,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 13:57:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:57:51,671 INFO L87 Difference]: Start difference. First operand 620 states and 691 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:52,374 INFO L93 Difference]: Finished difference Result 978 states and 1071 transitions. [2021-12-15 13:57:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:57:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 13:57:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:52,376 INFO L225 Difference]: With dead ends: 978 [2021-12-15 13:57:52,376 INFO L226 Difference]: Without dead ends: 978 [2021-12-15 13:57:52,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 13:57:52,379 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 355 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:52,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 840 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:57:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-12-15 13:57:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 760. [2021-12-15 13:57:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 758 states have (on average 1.1266490765171504) internal successors, (854), 759 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 854 transitions. [2021-12-15 13:57:52,387 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 854 transitions. Word has length 52 [2021-12-15 13:57:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:52,387 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 854 transitions. [2021-12-15 13:57:52,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 854 transitions. [2021-12-15 13:57:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 13:57:52,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:52,388 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:52,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:52,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:52,605 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash 52758665, now seen corresponding path program 3 times [2021-12-15 13:57:52,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:52,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383743701] [2021-12-15 13:57:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:52,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:52,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383743701] [2021-12-15 13:57:52,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383743701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039335962] [2021-12-15 13:57:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:52,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:52,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:52,769 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:52,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 13:57:52,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:57:52,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 13:57:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:52,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:53,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:53,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:53,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:57:53,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:57:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 13:57:53,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039335962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:53,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:53,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 32 [2021-12-15 13:57:53,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96363408] [2021-12-15 13:57:53,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:53,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 13:57:53,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 13:57:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-12-15 13:57:53,403 INFO L87 Difference]: Start difference. First operand 760 states and 854 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:55,323 INFO L93 Difference]: Finished difference Result 1079 states and 1159 transitions. [2021-12-15 13:57:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-15 13:57:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-15 13:57:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:55,325 INFO L225 Difference]: With dead ends: 1079 [2021-12-15 13:57:55,325 INFO L226 Difference]: Without dead ends: 923 [2021-12-15 13:57:55,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 3456 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1027, Invalid=10745, Unknown=0, NotChecked=0, Total=11772 [2021-12-15 13:57:55,327 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 256 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:55,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1043 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1558 Invalid, 0 Unknown, 254 Unchecked, 0.5s Time] [2021-12-15 13:57:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-12-15 13:57:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 689. [2021-12-15 13:57:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 687 states have (on average 1.1135371179039302) internal successors, (765), 688 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 765 transitions. [2021-12-15 13:57:55,335 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 765 transitions. Word has length 56 [2021-12-15 13:57:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 765 transitions. [2021-12-15 13:57:55,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 765 transitions. [2021-12-15 13:57:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 13:57:55,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:55,336 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:55,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:55,553 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1586425820, now seen corresponding path program 8 times [2021-12-15 13:57:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:55,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204914807] [2021-12-15 13:57:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:55,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:55,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204914807] [2021-12-15 13:57:55,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204914807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601273032] [2021-12-15 13:57:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:55,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:55,775 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:55,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 13:57:55,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:55,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-15 13:57:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:56,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:56,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-15 13:57:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:56,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:57,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:57:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 13:57:57,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:57:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:57,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601273032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:57,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:57,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 52 [2021-12-15 13:57:57,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117517171] [2021-12-15 13:57:57,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:57,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-15 13:57:57,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-15 13:57:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2463, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 13:57:57,623 INFO L87 Difference]: Start difference. First operand 689 states and 765 transitions. Second operand has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:59,357 INFO L93 Difference]: Finished difference Result 1229 states and 1324 transitions. [2021-12-15 13:57:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-15 13:57:59,357 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 13:57:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:59,360 INFO L225 Difference]: With dead ends: 1229 [2021-12-15 13:57:59,360 INFO L226 Difference]: Without dead ends: 1198 [2021-12-15 13:57:59,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=586, Invalid=7786, Unknown=0, NotChecked=0, Total=8372 [2021-12-15 13:57:59,361 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 373 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:59,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2301 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1506 Invalid, 0 Unknown, 584 Unchecked, 0.5s Time] [2021-12-15 13:57:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-12-15 13:57:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 834. [2021-12-15 13:57:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 832 states have (on average 1.1105769230769231) internal successors, (924), 833 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 924 transitions. [2021-12-15 13:57:59,370 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 924 transitions. Word has length 57 [2021-12-15 13:57:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:59,370 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 924 transitions. [2021-12-15 13:57:59,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 924 transitions. [2021-12-15 13:57:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 13:57:59,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:59,372 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:59,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:59,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-15 13:57:59,589 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:57:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -377019521, now seen corresponding path program 6 times [2021-12-15 13:57:59,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:59,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068144897] [2021-12-15 13:57:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:59,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:59,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068144897] [2021-12-15 13:57:59,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068144897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476346130] [2021-12-15 13:57:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:57:59,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:59,985 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:59,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 13:58:00,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 13:58:00,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-15 13:58:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:00,104 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:00,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:58:00,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:00,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:58:00,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:58:02,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:58:02,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-15 13:58:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:02,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:03,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:03,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-15 13:58:03,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:03,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-15 13:58:03,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-15 13:58:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:03,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476346130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:03,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:03,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 17] total 48 [2021-12-15 13:58:03,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701886380] [2021-12-15 13:58:03,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:03,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-15 13:58:03,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-15 13:58:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2094, Unknown=1, NotChecked=0, Total=2256 [2021-12-15 13:58:03,551 INFO L87 Difference]: Start difference. First operand 834 states and 924 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:04,859 INFO L93 Difference]: Finished difference Result 1468 states and 1636 transitions. [2021-12-15 13:58:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-15 13:58:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 13:58:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:04,862 INFO L225 Difference]: With dead ends: 1468 [2021-12-15 13:58:04,862 INFO L226 Difference]: Without dead ends: 1431 [2021-12-15 13:58:04,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=542, Invalid=6939, Unknown=1, NotChecked=0, Total=7482 [2021-12-15 13:58:04,864 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:04,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1055 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 557 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2021-12-15 13:58:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-12-15 13:58:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 919. [2021-12-15 13:58:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 917 states have (on average 1.1068702290076335) internal successors, (1015), 918 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1015 transitions. [2021-12-15 13:58:04,875 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1015 transitions. Word has length 57 [2021-12-15 13:58:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:04,875 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1015 transitions. [2021-12-15 13:58:04,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1015 transitions. [2021-12-15 13:58:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 13:58:04,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:04,877 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:04,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:05,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-15 13:58:05,094 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -424589822, now seen corresponding path program 7 times [2021-12-15 13:58:05,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:05,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976349550] [2021-12-15 13:58:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:05,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:05,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:05,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976349550] [2021-12-15 13:58:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976349550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:05,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716923927] [2021-12-15 13:58:05,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:58:05,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:05,248 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:05,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 13:58:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-15 13:58:05,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:58:05,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:58:05,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:05,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:06,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716923927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:06,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:06,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-15 13:58:06,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796901532] [2021-12-15 13:58:06,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:06,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:58:06,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:58:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:58:06,310 INFO L87 Difference]: Start difference. First operand 919 states and 1015 transitions. Second operand has 39 states, 38 states have (on average 4.605263157894737) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:07,029 INFO L93 Difference]: Finished difference Result 1447 states and 1596 transitions. [2021-12-15 13:58:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 13:58:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.605263157894737) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 13:58:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:07,032 INFO L225 Difference]: With dead ends: 1447 [2021-12-15 13:58:07,032 INFO L226 Difference]: Without dead ends: 1447 [2021-12-15 13:58:07,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2021-12-15 13:58:07,033 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 507 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:07,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 987 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:58:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-12-15 13:58:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1042. [2021-12-15 13:58:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1040 states have (on average 1.1105769230769231) internal successors, (1155), 1041 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1155 transitions. [2021-12-15 13:58:07,044 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1155 transitions. Word has length 61 [2021-12-15 13:58:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1155 transitions. [2021-12-15 13:58:07,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.605263157894737) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1155 transitions. [2021-12-15 13:58:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 13:58:07,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:07,045 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:07,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:07,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-15 13:58:07,262 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1455608263, now seen corresponding path program 9 times [2021-12-15 13:58:07,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:07,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756309957] [2021-12-15 13:58:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:07,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:07,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:07,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756309957] [2021-12-15 13:58:07,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756309957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:07,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098770848] [2021-12-15 13:58:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:58:07,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:07,476 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:07,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 13:58:07,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 13:58:07,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-15 13:58:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:07,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:58:07,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:58:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:07,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:58:07,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:58:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:07,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098770848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:07,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:07,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2021-12-15 13:58:07,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29702081] [2021-12-15 13:58:07,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:58:07,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:58:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:58:07,996 INFO L87 Difference]: Start difference. First operand 1042 states and 1155 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:08,943 INFO L93 Difference]: Finished difference Result 2215 states and 2400 transitions. [2021-12-15 13:58:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-15 13:58:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 13:58:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:08,948 INFO L225 Difference]: With dead ends: 2215 [2021-12-15 13:58:08,948 INFO L226 Difference]: Without dead ends: 2179 [2021-12-15 13:58:08,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=567, Invalid=4545, Unknown=0, NotChecked=0, Total=5112 [2021-12-15 13:58:08,949 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 602 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:08,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 2010 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1422 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2021-12-15 13:58:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-12-15 13:58:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1397. [2021-12-15 13:58:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1395 states have (on average 1.113978494623656) internal successors, (1554), 1396 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1554 transitions. [2021-12-15 13:58:09,000 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1554 transitions. Word has length 66 [2021-12-15 13:58:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:09,000 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1554 transitions. [2021-12-15 13:58:09,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1554 transitions. [2021-12-15 13:58:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 13:58:09,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:09,002 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:09,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:09,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:09,219 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash -200440626, now seen corresponding path program 8 times [2021-12-15 13:58:09,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:09,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637873323] [2021-12-15 13:58:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:09,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:09,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637873323] [2021-12-15 13:58:09,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637873323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:09,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641597853] [2021-12-15 13:58:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:58:09,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:09,427 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:09,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 13:58:09,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:58:09,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-15 13:58:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:09,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:09,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:58:09,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:58:09,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:58:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:09,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:10,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_842 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_842) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)))) is different from false [2021-12-15 13:58:10,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:10,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:58:10,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:10,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:58:10,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:58:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641597853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:10,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:10,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2021-12-15 13:58:10,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623332821] [2021-12-15 13:58:10,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:10,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 13:58:10,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 13:58:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1025, Unknown=1, NotChecked=64, Total=1190 [2021-12-15 13:58:10,196 INFO L87 Difference]: Start difference. First operand 1397 states and 1554 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:10,892 INFO L93 Difference]: Finished difference Result 2670 states and 2953 transitions. [2021-12-15 13:58:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 13:58:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 13:58:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:10,898 INFO L225 Difference]: With dead ends: 2670 [2021-12-15 13:58:10,898 INFO L226 Difference]: Without dead ends: 2461 [2021-12-15 13:58:10,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=3029, Unknown=1, NotChecked=112, Total=3422 [2021-12-15 13:58:10,906 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 268 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:10,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 2524 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1462 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2021-12-15 13:58:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-12-15 13:58:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1718. [2021-12-15 13:58:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1716 states have (on average 1.1124708624708626) internal successors, (1909), 1717 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 1909 transitions. [2021-12-15 13:58:10,976 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 1909 transitions. Word has length 69 [2021-12-15 13:58:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:10,976 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 1909 transitions. [2021-12-15 13:58:10,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 1909 transitions. [2021-12-15 13:58:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 13:58:10,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:10,977 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:10,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:11,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:11,194 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1335660074, now seen corresponding path program 10 times [2021-12-15 13:58:11,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:11,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601472655] [2021-12-15 13:58:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:11,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:11,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601472655] [2021-12-15 13:58:11,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601472655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663142206] [2021-12-15 13:58:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:58:11,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:11,433 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 13:58:11,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:58:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-15 13:58:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:11,542 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:58:11,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 13:58:12,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:12,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-15 13:58:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:12,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:12,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:58:12,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:58:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:13,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663142206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:13,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:13,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 63 [2021-12-15 13:58:13,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969838783] [2021-12-15 13:58:13,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:13,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 13:58:13,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:13,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 13:58:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3663, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 13:58:13,601 INFO L87 Difference]: Start difference. First operand 1718 states and 1909 transitions. Second operand has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:17,602 INFO L93 Difference]: Finished difference Result 2828 states and 3079 transitions. [2021-12-15 13:58:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-15 13:58:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-15 13:58:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:17,607 INFO L225 Difference]: With dead ends: 2828 [2021-12-15 13:58:17,608 INFO L226 Difference]: Without dead ends: 2561 [2021-12-15 13:58:17,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2631, Invalid=12375, Unknown=0, NotChecked=0, Total=15006 [2021-12-15 13:58:17,610 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 956 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:17,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 1730 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2277 Invalid, 0 Unknown, 239 Unchecked, 1.0s Time] [2021-12-15 13:58:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-12-15 13:58:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1772. [2021-12-15 13:58:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1770 states have (on average 1.119774011299435) internal successors, (1982), 1771 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 1982 transitions. [2021-12-15 13:58:17,647 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 1982 transitions. Word has length 70 [2021-12-15 13:58:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:17,647 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 1982 transitions. [2021-12-15 13:58:17,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 1982 transitions. [2021-12-15 13:58:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 13:58:17,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:17,655 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:17,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:17,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-15 13:58:17,872 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -567414834, now seen corresponding path program 4 times [2021-12-15 13:58:17,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852856189] [2021-12-15 13:58:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:17,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 13:58:18,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:18,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852856189] [2021-12-15 13:58:18,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852856189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:18,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373098556] [2021-12-15 13:58:18,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:58:18,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:18,189 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:18,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 13:58:18,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:58:18,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-15 13:58:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:18,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:58:18,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:58:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 13:58:18,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 13:58:18,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373098556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:18,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:18,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 33 [2021-12-15 13:58:18,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629148202] [2021-12-15 13:58:18,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:18,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:58:18,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:58:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:58:18,822 INFO L87 Difference]: Start difference. First operand 1772 states and 1982 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 33 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:20,493 INFO L93 Difference]: Finished difference Result 2620 states and 2850 transitions. [2021-12-15 13:58:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-15 13:58:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 33 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-15 13:58:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:20,497 INFO L225 Difference]: With dead ends: 2620 [2021-12-15 13:58:20,497 INFO L226 Difference]: Without dead ends: 2350 [2021-12-15 13:58:20,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1106, Invalid=8014, Unknown=0, NotChecked=0, Total=9120 [2021-12-15 13:58:20,499 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 320 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:20,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 967 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:58:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-12-15 13:58:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1787. [2021-12-15 13:58:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1785 states have (on average 1.1103641456582634) internal successors, (1982), 1786 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 1982 transitions. [2021-12-15 13:58:20,519 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 1982 transitions. Word has length 70 [2021-12-15 13:58:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 1982 transitions. [2021-12-15 13:58:20,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 33 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 1982 transitions. [2021-12-15 13:58:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 13:58:20,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:20,521 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:20,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:20,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-15 13:58:20,738 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:20,739 INFO L85 PathProgramCache]: Analyzing trace with hash -165610799, now seen corresponding path program 9 times [2021-12-15 13:58:20,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:20,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309985008] [2021-12-15 13:58:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:20,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:20,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:20,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309985008] [2021-12-15 13:58:20,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309985008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:20,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297310517] [2021-12-15 13:58:20,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:58:20,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:20,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:20,936 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:20,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 13:58:21,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 13:58:21,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-15 13:58:21,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:58:21,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:58:21,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:21,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:22,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297310517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:22,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:22,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2021-12-15 13:58:22,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179585860] [2021-12-15 13:58:22,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:22,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 13:58:22,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 13:58:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 13:58:22,225 INFO L87 Difference]: Start difference. First operand 1787 states and 1982 transitions. Second operand has 44 states, 43 states have (on average 4.883720930232558) internal successors, (210), 44 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:23,474 INFO L93 Difference]: Finished difference Result 2815 states and 3122 transitions. [2021-12-15 13:58:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 13:58:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.883720930232558) internal successors, (210), 44 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-15 13:58:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:23,481 INFO L225 Difference]: With dead ends: 2815 [2021-12-15 13:58:23,481 INFO L226 Difference]: Without dead ends: 2815 [2021-12-15 13:58:23,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=840, Invalid=3716, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 13:58:23,482 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 545 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:23,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1417 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 13:58:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-12-15 13:58:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 1954. [2021-12-15 13:58:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1952 states have (on average 1.1116803278688525) internal successors, (2170), 1953 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2170 transitions. [2021-12-15 13:58:23,514 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2170 transitions. Word has length 73 [2021-12-15 13:58:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:23,514 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 2170 transitions. [2021-12-15 13:58:23,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.883720930232558) internal successors, (210), 44 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2170 transitions. [2021-12-15 13:58:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 13:58:23,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:23,516 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:23,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:23,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:23,734 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-15 13:58:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash -756245934, now seen corresponding path program 5 times [2021-12-15 13:58:23,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:23,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320660435] [2021-12-15 13:58:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:23,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 125 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 13:58:23,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320660435] [2021-12-15 13:58:23,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320660435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949093392] [2021-12-15 13:58:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:58:23,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:23,936 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:23,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-15 13:58:24,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 13:58:24,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:24,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-15 13:58:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:24,062 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:58:24,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:58:24,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:24,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:58:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 13:58:25,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:58:25,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:58:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 126 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 13:58:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949093392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:26,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 17] total 55 [2021-12-15 13:58:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085944469] [2021-12-15 13:58:26,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:26,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-15 13:58:26,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-15 13:58:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2754, Unknown=0, NotChecked=0, Total=2970 [2021-12-15 13:58:26,076 INFO L87 Difference]: Start difference. First operand 1954 states and 2170 transitions. Second operand has 55 states, 55 states have (on average 3.327272727272727) internal successors, (183), 55 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)