./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/list-simple/sll2n_append_unequal.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 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:17:22,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:17:22,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:17:22,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:17:22,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:17:22,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:17:22,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:17:22,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:17:22,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:17:22,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:17:22,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:17:22,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:17:22,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:17:22,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:17:22,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:17:22,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:17:22,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:17:22,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:17:22,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:17:22,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:17:22,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:17:22,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:17:22,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:17:22,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:17:22,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:17:22,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:17:22,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:17:22,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:17:22,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:17:22,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:17:22,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:17:22,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:17:22,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:17:22,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:17:22,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:17:22,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:17:22,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:17:22,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:17:22,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:17:22,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:17:22,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:17:22,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:17:22,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:17:22,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:17:22,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:17:22,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:17:22,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:17:22,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:17:22,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:17:22,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:17:22,895 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:17:22,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:17:22,896 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:17:22,896 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:17:22,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:17:22,898 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:17:22,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:17:22,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:17:22,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:17:22,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:17:22,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:17:22,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:17:22,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:17:22,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:17:22,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:17:22,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:17:22,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:17:22,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2021-12-22 00:17:23,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:17:23,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:17:23,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:17:23,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:17:23,127 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:17:23,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-12-22 00:17:23,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82cd19ae/31ce2d241f4346e5bc8af03da97103eb/FLAGd3e46e09c [2021-12-22 00:17:23,597 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:17:23,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-12-22 00:17:23,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82cd19ae/31ce2d241f4346e5bc8af03da97103eb/FLAGd3e46e09c [2021-12-22 00:17:23,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82cd19ae/31ce2d241f4346e5bc8af03da97103eb [2021-12-22 00:17:23,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:17:23,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:17:23,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:17:23,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:17:23,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:17:23,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:17:23" (1/1) ... [2021-12-22 00:17:23,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6267e3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:23, skipping insertion in model container [2021-12-22 00:17:23,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:17:23" (1/1) ... [2021-12-22 00:17:23,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:17:23,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:17:23,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-12-22 00:17:23,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:17:23,958 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:17:23,995 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-12-22 00:17:23,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:17:24,018 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:17:24,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24 WrapperNode [2021-12-22 00:17:24,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:17:24,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:17:24,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:17:24,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:17:24,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,077 INFO L137 Inliner]: procedures = 127, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2021-12-22 00:17:24,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:17:24,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:17:24,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:17:24,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:17:24,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:17:24,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:17:24,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:17:24,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:17:24,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (1/1) ... [2021-12-22 00:17:24,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:17:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:17:24,146 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) [2021-12-22 00:17:24,148 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 [2021-12-22 00:17:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 00:17:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-22 00:17:24,190 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:17:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:17:24,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:17:24,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:17:24,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:17:24,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:17:24,331 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:17:24,348 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:17:24,613 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:17:24,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:17:24,617 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 00:17:24,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:17:24 BoogieIcfgContainer [2021-12-22 00:17:24,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:17:24,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:17:24,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:17:24,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:17:24,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:17:23" (1/3) ... [2021-12-22 00:17:24,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f9b832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:17:24, skipping insertion in model container [2021-12-22 00:17:24,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:24" (2/3) ... [2021-12-22 00:17:24,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f9b832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:17:24, skipping insertion in model container [2021-12-22 00:17:24,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:17:24" (3/3) ... [2021-12-22 00:17:24,625 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2021-12-22 00:17:24,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:17:24,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2021-12-22 00:17:24,690 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:17:24,695 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 [2021-12-22 00:17:24,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-12-22 00:17:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 53 states have (on average 2.0) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:17:24,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:24,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:24,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1814520441, now seen corresponding path program 1 times [2021-12-22 00:17:24,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:24,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011337385] [2021-12-22 00:17:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:24,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:24,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011337385] [2021-12-22 00:17:24,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011337385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:24,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:24,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:17:24,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448881005] [2021-12-22 00:17:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:24,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:17:24,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:17:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:24,905 INFO L87 Difference]: Start difference. First operand has 96 states, 53 states have (on average 2.0) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:25,002 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-12-22 00:17:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:17:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 00:17:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:25,010 INFO L225 Difference]: With dead ends: 94 [2021-12-22 00:17:25,010 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 00:17:25,011 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 [2021-12-22 00:17:25,015 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:25,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:17:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 00:17:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-22 00:17:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 87 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-12-22 00:17:25,042 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 7 [2021-12-22 00:17:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:25,042 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-12-22 00:17:25,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-12-22 00:17:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:17:25,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:25,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:25,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:17:25,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1814520442, now seen corresponding path program 1 times [2021-12-22 00:17:25,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:25,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23705544] [2021-12-22 00:17:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:25,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:25,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23705544] [2021-12-22 00:17:25,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23705544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:25,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:25,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:17:25,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198726759] [2021-12-22 00:17:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:25,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:17:25,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:25,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:17:25,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:25,096 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:25,139 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-12-22 00:17:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:17:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 00:17:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:25,147 INFO L225 Difference]: With dead ends: 89 [2021-12-22 00:17:25,147 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 00:17:25,147 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 [2021-12-22 00:17:25,148 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:25,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 150 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:17:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 00:17:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-22 00:17:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 85 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-12-22 00:17:25,160 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 7 [2021-12-22 00:17:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:25,162 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-12-22 00:17:25,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-12-22 00:17:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:17:25,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:25,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:25,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:17:25,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2099468992, now seen corresponding path program 1 times [2021-12-22 00:17:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669428123] [2021-12-22 00:17:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:25,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 00:17:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:25,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:25,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669428123] [2021-12-22 00:17:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669428123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:25,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:25,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:17:25,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90742536] [2021-12-22 00:17:25,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:25,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:17:25,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:17:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:17:25,268 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:25,446 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-12-22 00:17:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:17:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-22 00:17:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:25,451 INFO L225 Difference]: With dead ends: 93 [2021-12-22 00:17:25,451 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 00:17:25,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:17:25,456 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 11 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:25,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 345 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:17:25,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 00:17:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-12-22 00:17:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.803921568627451) internal successors, (92), 84 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-22 00:17:25,474 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 13 [2021-12-22 00:17:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:25,475 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-22 00:17:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-22 00:17:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:17:25,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:25,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:25,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:17:25,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2099468991, now seen corresponding path program 1 times [2021-12-22 00:17:25,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:25,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215111613] [2021-12-22 00:17:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:25,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 00:17:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:25,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215111613] [2021-12-22 00:17:25,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215111613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:25,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:25,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:17:25,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741016840] [2021-12-22 00:17:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:25,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:17:25,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:17:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:17:25,632 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:25,782 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-12-22 00:17:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:17:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-22 00:17:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:25,784 INFO L225 Difference]: With dead ends: 92 [2021-12-22 00:17:25,784 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 00:17:25,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:17:25,790 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 9 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:25,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 361 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:17:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 00:17:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-12-22 00:17:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-12-22 00:17:25,796 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 13 [2021-12-22 00:17:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:25,796 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-12-22 00:17:25,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-12-22 00:17:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:17:25,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:25,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:25,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:17:25,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1633295936, now seen corresponding path program 1 times [2021-12-22 00:17:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299103988] [2021-12-22 00:17:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:25,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 00:17:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:25,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:25,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299103988] [2021-12-22 00:17:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299103988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:25,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:25,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:17:25,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043698107] [2021-12-22 00:17:25,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:17:25,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:17:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:17:25,861 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:25,925 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-22 00:17:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:17:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 00:17:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:25,926 INFO L225 Difference]: With dead ends: 93 [2021-12-22 00:17:25,926 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 00:17:25,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:17:25,927 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 4 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 222 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:17:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 00:17:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-12-22 00:17:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 84 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-22 00:17:25,931 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 15 [2021-12-22 00:17:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:25,931 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-22 00:17:25,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-22 00:17:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:17:25,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:25,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:25,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:17:25,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001534, now seen corresponding path program 1 times [2021-12-22 00:17:25,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:25,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103490654] [2021-12-22 00:17:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:25,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 00:17:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 00:17:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 00:17:26,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:26,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103490654] [2021-12-22 00:17:26,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103490654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:17:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141772631] [2021-12-22 00:17:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:26,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:17:26,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:17:26,008 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) [2021-12-22 00:17:26,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:17:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 00:17:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:26,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:17:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 00:17:26,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141772631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:17:26,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:17:26,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-22 00:17:26,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013168198] [2021-12-22 00:17:26,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:17:26,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:17:26,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:17:26,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:17:26,292 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 00:17:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:26,344 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-12-22 00:17:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:17:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-22 00:17:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:26,345 INFO L225 Difference]: With dead ends: 94 [2021-12-22 00:17:26,345 INFO L226 Difference]: Without dead ends: 94 [2021-12-22 00:17:26,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:17:26,347 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 8 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:26,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 310 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:17:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-22 00:17:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-22 00:17:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 89 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:17:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-12-22 00:17:26,358 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 28 [2021-12-22 00:17:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:26,359 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-12-22 00:17:26,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 00:17:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-12-22 00:17:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 00:17:26,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:26,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:26,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:26,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 00:17:26,571 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1367092864, now seen corresponding path program 2 times [2021-12-22 00:17:26,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:26,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883691634] [2021-12-22 00:17:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:26,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:26,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 00:17:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:26,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 00:17:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:26,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 00:17:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:17:26,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:26,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883691634] [2021-12-22 00:17:26,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883691634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:17:26,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207924711] [2021-12-22 00:17:26,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:17:26,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:17:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:17:26,775 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) [2021-12-22 00:17:26,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:17:26,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:17:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:17:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 00:17:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:26,930 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:26,952 INFO L387 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 [2021-12-22 00:17:27,018 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 00:17:27,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:17:27,060 INFO L387 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 [2021-12-22 00:17:27,238 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 00:17:27,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:17:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:17:27,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:17:27,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207924711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:17:27,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:17:27,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-12-22 00:17:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516607536] [2021-12-22 00:17:27,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:17:27,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 00:17:27,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 00:17:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:17:27,422 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 00:17:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:27,648 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-22 00:17:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:17:27,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-22 00:17:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:27,649 INFO L225 Difference]: With dead ends: 102 [2021-12-22 00:17:27,649 INFO L226 Difference]: Without dead ends: 102 [2021-12-22 00:17:27,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-22 00:17:27,650 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:27,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 347 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2021-12-22 00:17:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-22 00:17:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-12-22 00:17:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.631578947368421) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:17:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-22 00:17:27,653 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 41 [2021-12-22 00:17:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:27,654 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-22 00:17:27,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 00:17:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-22 00:17:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 00:17:27,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:27,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:27,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 00:17:27,871 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,SelfDestructingSolverStorable6 [2021-12-22 00:17:27,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1367092863, now seen corresponding path program 1 times [2021-12-22 00:17:27,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:17:27,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475182784] [2021-12-22 00:17:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:27,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:17:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 00:17:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 00:17:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:28,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 00:17:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 00:17:28,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:17:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475182784] [2021-12-22 00:17:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475182784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:17:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915862409] [2021-12-22 00:17:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:28,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:17:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:17:28,062 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) [2021-12-22 00:17:28,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:17:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:28,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 00:17:28,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:28,180 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:28,212 INFO L387 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 [2021-12-22 00:17:28,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 40639 column 46: unknown constant v_#length_BEFORE_CALL_2 [2021-12-22 00:17:28,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:17:28,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-22 00:17:28,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898499717] [2021-12-22 00:17:28,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 00:17:28,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:17:28,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:17:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:17:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:17:28,328 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:17:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 00:17:28,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:17:28,329 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:28,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:17:28,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:28,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:17:28,552 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e7c8948 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-22 00:17:28,555 INFO L158 Benchmark]: Toolchain (without parser) took 4920.85ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 54.8MB in the beginning and 100.3MB in the end (delta: -45.5MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,555 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory was 72.7MB in the beginning and 72.7MB in the end (delta: 57.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.02ms. Allocated memory is still 92.3MB. Free memory was 54.6MB in the beginning and 60.5MB in the end (delta: -5.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,555 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.21ms. Allocated memory is still 92.3MB. Free memory was 60.5MB in the beginning and 58.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,555 INFO L158 Benchmark]: Boogie Preprocessor took 35.20ms. Allocated memory is still 92.3MB. Free memory was 58.2MB in the beginning and 56.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,556 INFO L158 Benchmark]: RCFGBuilder took 497.11ms. Allocated memory is still 92.3MB. Free memory was 56.3MB in the beginning and 38.0MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,556 INFO L158 Benchmark]: TraceAbstraction took 3934.46ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 37.5MB in the beginning and 101.2MB in the end (delta: -63.7MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-12-22 00:17:28,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory was 72.7MB in the beginning and 72.7MB in the end (delta: 57.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.02ms. Allocated memory is still 92.3MB. Free memory was 54.6MB in the beginning and 60.5MB in the end (delta: -5.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.21ms. Allocated memory is still 92.3MB. Free memory was 60.5MB in the beginning and 58.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.20ms. Allocated memory is still 92.3MB. Free memory was 58.2MB in the beginning and 56.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 497.11ms. Allocated memory is still 92.3MB. Free memory was 56.3MB in the beginning and 38.0MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 3934.46ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 37.5MB in the beginning and 101.2MB in the end (delta: -63.7MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e7c8948 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e7c8948: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-22 00:17:28,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/list-simple/sll2n_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:17:30,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:17:30,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:17:30,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:17:30,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:17:30,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:17:30,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:17:30,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:17:30,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:17:30,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:17:30,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:17:30,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:17:30,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:17:30,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:17:30,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:17:30,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:17:30,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:17:30,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:17:30,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:17:30,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:17:30,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:17:30,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:17:30,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:17:30,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:17:30,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:17:30,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:17:30,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:17:30,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:17:30,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:17:30,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:17:30,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:17:30,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:17:30,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:17:30,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:17:30,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:17:30,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:17:30,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:17:30,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:17:30,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:17:30,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:17:30,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:17:30,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 00:17:30,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:17:30,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:17:30,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:17:30,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:17:30,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:17:30,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:17:30,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:17:30,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:17:30,444 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:17:30,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:17:30,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:17:30,445 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:17:30,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:17:30,447 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:17:30,447 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 00:17:30,447 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 00:17:30,447 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:17:30,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:17:30,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:17:30,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:17:30,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:17:30,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:17:30,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:17:30,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:17:30,448 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 00:17:30,448 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 00:17:30,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:17:30,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 00:17:30,449 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2021-12-22 00:17:30,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:17:30,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:17:30,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:17:30,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:17:30,778 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:17:30,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-12-22 00:17:30,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e5a7a4c/4db990a0025b47499c364f0ea4714077/FLAG4372b0cd6 [2021-12-22 00:17:31,283 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:17:31,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-12-22 00:17:31,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e5a7a4c/4db990a0025b47499c364f0ea4714077/FLAG4372b0cd6 [2021-12-22 00:17:31,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e5a7a4c/4db990a0025b47499c364f0ea4714077 [2021-12-22 00:17:31,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:17:31,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:17:31,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:17:31,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:17:31,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:17:31,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7ba2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31, skipping insertion in model container [2021-12-22 00:17:31,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:17:31,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:17:31,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-12-22 00:17:31,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:17:31,591 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:17:31,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-12-22 00:17:31,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:17:31,672 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:17:31,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31 WrapperNode [2021-12-22 00:17:31,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:17:31,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:17:31,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:17:31,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:17:31,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,711 INFO L137 Inliner]: procedures = 130, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 138 [2021-12-22 00:17:31,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:17:31,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:17:31,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:17:31,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:17:31,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:17:31,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:17:31,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:17:31,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:17:31,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (1/1) ... [2021-12-22 00:17:31,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:17:31,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:17:31,772 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) [2021-12-22 00:17:31,781 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 [2021-12-22 00:17:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 00:17:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-22 00:17:31,810 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-22 00:17:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:17:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 00:17:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:17:31,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:17:31,938 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:17:31,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:17:32,244 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:17:32,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:17:32,252 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 00:17:32,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:17:32 BoogieIcfgContainer [2021-12-22 00:17:32,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:17:32,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:17:32,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:17:32,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:17:32,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:17:31" (1/3) ... [2021-12-22 00:17:32,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235d88c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:17:32, skipping insertion in model container [2021-12-22 00:17:32,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:17:31" (2/3) ... [2021-12-22 00:17:32,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235d88c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:17:32, skipping insertion in model container [2021-12-22 00:17:32,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:17:32" (3/3) ... [2021-12-22 00:17:32,260 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2021-12-22 00:17:32,263 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:17:32,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2021-12-22 00:17:32,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:17:32,306 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 [2021-12-22 00:17:32,306 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-12-22 00:17:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 53 states have (on average 2.0) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:17:32,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:32,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:32,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1814520441, now seen corresponding path program 1 times [2021-12-22 00:17:32,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:32,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315846288] [2021-12-22 00:17:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:32,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:32,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:32,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 00:17:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:32,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 00:17:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:32,503 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:32,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:17:32,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315846288] [2021-12-22 00:17:32,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315846288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:32,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:17:32,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975413971] [2021-12-22 00:17:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:32,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:17:32,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:17:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:32,538 INFO L87 Difference]: Start difference. First operand has 96 states, 53 states have (on average 2.0) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:32,656 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-12-22 00:17:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:17:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 00:17:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:32,663 INFO L225 Difference]: With dead ends: 94 [2021-12-22 00:17:32,663 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 00:17:32,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:32,666 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:32,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:17:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 00:17:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-22 00:17:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 87 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-12-22 00:17:32,691 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 7 [2021-12-22 00:17:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:32,692 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-12-22 00:17:32,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-12-22 00:17:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 00:17:32,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:32,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:32,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 00:17:32,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:17:32,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1814520442, now seen corresponding path program 1 times [2021-12-22 00:17:32,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:32,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664238499] [2021-12-22 00:17:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:32,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:32,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:32,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 00:17:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:17:32,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:32,969 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:32,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:17:32,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664238499] [2021-12-22 00:17:32,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664238499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:32,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:32,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:17:32,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768119207] [2021-12-22 00:17:32,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:32,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:17:32,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:17:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:32,994 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:33,124 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-12-22 00:17:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:17:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 00:17:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:33,126 INFO L225 Difference]: With dead ends: 89 [2021-12-22 00:17:33,126 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 00:17:33,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:33,127 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:33,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 150 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:17:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 00:17:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-22 00:17:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 85 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-12-22 00:17:33,139 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 7 [2021-12-22 00:17:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:33,140 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-12-22 00:17:33,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:17:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-12-22 00:17:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:17:33,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:33,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:33,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:33,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:17:33,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2099468992, now seen corresponding path program 1 times [2021-12-22 00:17:33,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:33,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147763750] [2021-12-22 00:17:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:33,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:33,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:33,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:33,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 00:17:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 00:17:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:33,422 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:33,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:17:33,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147763750] [2021-12-22 00:17:33,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147763750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:33,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:33,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:17:33,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775139325] [2021-12-22 00:17:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:33,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:17:33,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:17:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:17:33,483 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:33,779 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-12-22 00:17:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:17:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-22 00:17:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:33,781 INFO L225 Difference]: With dead ends: 93 [2021-12-22 00:17:33,781 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 00:17:33,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:17:33,782 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 10 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:33,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 309 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:17:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 00:17:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-12-22 00:17:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.803921568627451) internal successors, (92), 84 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-22 00:17:33,790 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 13 [2021-12-22 00:17:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:33,791 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-22 00:17:33,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-22 00:17:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:17:33,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:33,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:33,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-22 00:17:33,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:17:33,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2099468991, now seen corresponding path program 1 times [2021-12-22 00:17:33,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76752459] [2021-12-22 00:17:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:33,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:33,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:33,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 00:17:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 00:17:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:34,105 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:34,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:17:34,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:34,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76752459] [2021-12-22 00:17:34,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76752459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:34,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:34,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:17:34,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983227144] [2021-12-22 00:17:34,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:34,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:17:34,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:34,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:17:34,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:17:34,174 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:34,434 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-12-22 00:17:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:17:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-22 00:17:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:34,436 INFO L225 Difference]: With dead ends: 92 [2021-12-22 00:17:34,436 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 00:17:34,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:17:34,437 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 9 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:34,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 325 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:17:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 00:17:34,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-12-22 00:17:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-12-22 00:17:34,441 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 13 [2021-12-22 00:17:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:34,441 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-12-22 00:17:34,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-12-22 00:17:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 00:17:34,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:34,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:34,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:34,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:17:34,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1633295936, now seen corresponding path program 1 times [2021-12-22 00:17:34,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698921] [2021-12-22 00:17:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:34,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:34,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:34,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 00:17:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:34,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:17:34,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:34,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:17:34,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698921] [2021-12-22 00:17:34,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:17:34,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:17:34,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:17:34,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85667649] [2021-12-22 00:17:34,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:17:34,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:17:34,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:17:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:34,749 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:34,757 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-22 00:17:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:17:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 00:17:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:34,758 INFO L225 Difference]: With dead ends: 93 [2021-12-22 00:17:34,758 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 00:17:34,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:17:34,759 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 4 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:34,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 185 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:17:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 00:17:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-12-22 00:17:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 84 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:17:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-22 00:17:34,763 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 15 [2021-12-22 00:17:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-22 00:17:34,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:17:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-22 00:17:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:17:34,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:34,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:34,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:17:34,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001534, now seen corresponding path program 1 times [2021-12-22 00:17:34,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220770215] [2021-12-22 00:17:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:34,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:34,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:34,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 00:17:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 00:17:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:35,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:17:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 00:17:35,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:35,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220770215] [2021-12-22 00:17:35,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220770215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:17:35,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:17:35,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-22 00:17:35,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693122870] [2021-12-22 00:17:35,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:17:35,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:17:35,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:17:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:17:35,200 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 00:17:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:35,224 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-12-22 00:17:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:17:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-22 00:17:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:35,228 INFO L225 Difference]: With dead ends: 99 [2021-12-22 00:17:35,228 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 00:17:35,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:17:35,229 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 15 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:35,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 372 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:17:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 00:17:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2021-12-22 00:17:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 89 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:17:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-12-22 00:17:35,233 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 28 [2021-12-22 00:17:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:35,234 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-12-22 00:17:35,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 00:17:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-12-22 00:17:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 00:17:35,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:35,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:35,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-22 00:17:35,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:17:35,442 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:35,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:35,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1367092864, now seen corresponding path program 2 times [2021-12-22 00:17:35,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:35,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834424768] [2021-12-22 00:17:35,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:17:35,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:35,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:35,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:35,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 00:17:35,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:17:35,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:17:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 00:17:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:35,631 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:35,653 INFO L387 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 [2021-12-22 00:17:35,800 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 00:17:35,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 00:17:35,844 INFO L387 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 [2021-12-22 00:17:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:17:36,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 00:17:36,346 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 00:17:36,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 17 [2021-12-22 00:17:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:17:36,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:17:36,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:36,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834424768] [2021-12-22 00:17:36,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834424768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:17:36,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [473630434] [2021-12-22 00:17:36,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:17:36,661 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:17:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:17:36,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:17:36,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-22 00:17:36,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 00:17:36,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082912005] [2021-12-22 00:17:36,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:17:36,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:17:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:17:36,875 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) [2021-12-22 00:17:36,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 1 [2021-12-22 00:17:36,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:17:37,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:17:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:17:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 00:17:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:37,057 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:39,154 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 00:17:39,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 00:17:41,306 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 00:17:41,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 00:17:41,424 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 00:17:41,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 17 [2021-12-22 00:17:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 8 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 00:17:41,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:17:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 00:17:41,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082912005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:17:41,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:17:41,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 15 [2021-12-22 00:17:41,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499033683] [2021-12-22 00:17:41,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:17:41,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 00:17:41,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:17:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 00:17:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2021-12-22 00:17:41,916 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 00:17:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:17:50,274 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-12-22 00:17:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 00:17:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2021-12-22 00:17:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:17:50,275 INFO L225 Difference]: With dead ends: 111 [2021-12-22 00:17:50,275 INFO L226 Difference]: Without dead ends: 111 [2021-12-22 00:17:50,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 107 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=96, Invalid=409, Unknown=1, NotChecked=0, Total=506 [2021-12-22 00:17:50,276 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 108 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:17:50,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 462 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2021-12-22 00:17:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-22 00:17:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-12-22 00:17:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.6031746031746033) internal successors, (101), 93 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:17:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-12-22 00:17:50,279 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 41 [2021-12-22 00:17:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:17:50,279 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-12-22 00:17:50,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 00:17:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-12-22 00:17:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 00:17:50,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:17:50,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:17:50,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:50,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:17:50,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:17:50,681 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:17:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:17:50,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1367092863, now seen corresponding path program 1 times [2021-12-22 00:17:50,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:17:50,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14044945] [2021-12-22 00:17:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:50,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:17:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:17:50,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:17:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 00:17:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 00:17:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:50,861 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:50,867 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:50,896 INFO L387 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 [2021-12-22 00:17:50,913 INFO L387 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 [2021-12-22 00:17:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:17:53,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:17:53,042 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:17:53,042 INFO L387 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 11 treesize of output 11 [2021-12-22 00:17:53,108 INFO L387 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 [2021-12-22 00:17:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:17:55,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 00:17:55,626 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:17:55,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-22 00:17:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:17:55,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:17:55,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:17:55,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14044945] [2021-12-22 00:17:55,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14044945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:17:55,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1345770663] [2021-12-22 00:17:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:17:55,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:17:55,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:17:55,930 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:17:55,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-22 00:17:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:17:56,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 00:17:56,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:17:56,167 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:17:56,184 INFO L387 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 [2021-12-22 00:17:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:17:56,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:17:56,448 INFO L387 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 [2021-12-22 00:17:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:17:58,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:17:58,912 INFO L387 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 [2021-12-22 00:17:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:17:59,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:17:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:17:59,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:18:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1345770663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:18:01,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:18:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-22 00:18:01,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72378639] [2021-12-22 00:18:01,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:18:01,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 00:18:01,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 00:18:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=478, Unknown=4, NotChecked=0, Total=552 [2021-12-22 00:18:01,324 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 00:18:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:10,208 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-12-22 00:18:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 00:18:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-12-22 00:18:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:10,210 INFO L225 Difference]: With dead ends: 105 [2021-12-22 00:18:10,210 INFO L226 Difference]: Without dead ends: 105 [2021-12-22 00:18:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=115, Invalid=807, Unknown=8, NotChecked=0, Total=930 [2021-12-22 00:18:10,211 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 4 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 819 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 364 Unchecked, 0.3s Time] [2021-12-22 00:18:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-22 00:18:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-22 00:18:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.536231884057971) internal successors, (106), 98 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-12-22 00:18:10,215 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 41 [2021-12-22 00:18:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:10,215 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-12-22 00:18:10,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 00:18:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-12-22 00:18:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 00:18:10,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:10,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:10,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:10,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-22 00:18:10,623 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash 483750337, now seen corresponding path program 1 times [2021-12-22 00:18:10,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:10,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138756363] [2021-12-22 00:18:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:10,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:10,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:10,625 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:10,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 00:18:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 00:18:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 00:18:10,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:10,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:10,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138756363] [2021-12-22 00:18:10,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138756363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:10,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:10,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:18:10,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708768106] [2021-12-22 00:18:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:10,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:18:10,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:10,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:18:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:18:10,790 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:18:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:10,902 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-12-22 00:18:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:18:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-22 00:18:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:10,904 INFO L225 Difference]: With dead ends: 115 [2021-12-22 00:18:10,904 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 00:18:10,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:18:10,904 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:10,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 84 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:18:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 00:18:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2021-12-22 00:18:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2021-12-22 00:18:10,908 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 43 [2021-12-22 00:18:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:10,908 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2021-12-22 00:18:10,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:18:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2021-12-22 00:18:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 00:18:10,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:10,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:10,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:11,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:11,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 483750338, now seen corresponding path program 1 times [2021-12-22 00:18:11,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295721396] [2021-12-22 00:18:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:11,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:11,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:11,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 00:18:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 00:18:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 00:18:11,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:11,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:11,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295721396] [2021-12-22 00:18:11,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295721396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:11,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:11,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:18:11,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337871560] [2021-12-22 00:18:11,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:11,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:18:11,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:18:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:18:11,332 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:11,444 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-12-22 00:18:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:18:11,447 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-12-22 00:18:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:11,448 INFO L225 Difference]: With dead ends: 101 [2021-12-22 00:18:11,448 INFO L226 Difference]: Without dead ends: 101 [2021-12-22 00:18:11,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:18:11,449 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 199 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:11,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 91 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:18:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-22 00:18:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-22 00:18:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 94 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2021-12-22 00:18:11,452 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 43 [2021-12-22 00:18:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2021-12-22 00:18:11,452 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2021-12-22 00:18:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:18:11,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:11,453 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:11,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:11,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:11,661 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1027607010, now seen corresponding path program 1 times [2021-12-22 00:18:11,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:11,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852519921] [2021-12-22 00:18:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:11,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:11,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:11,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 00:18:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:18:11,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 00:18:11,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:11,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:11,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852519921] [2021-12-22 00:18:11,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852519921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:11,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:11,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:18:11,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834652260] [2021-12-22 00:18:11,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:11,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:18:11,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:18:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:18:11,868 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:11,985 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-12-22 00:18:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:18:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-22 00:18:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:11,986 INFO L225 Difference]: With dead ends: 112 [2021-12-22 00:18:11,986 INFO L226 Difference]: Without dead ends: 112 [2021-12-22 00:18:11,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:18:11,986 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 135 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:11,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 98 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:18:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-22 00:18:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-12-22 00:18:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.463768115942029) internal successors, (101), 93 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-12-22 00:18:11,989 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 45 [2021-12-22 00:18:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-12-22 00:18:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-12-22 00:18:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:18:11,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:11,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:12,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-22 00:18:12,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:12,199 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1027607011, now seen corresponding path program 1 times [2021-12-22 00:18:12,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:12,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940867496] [2021-12-22 00:18:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:12,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:12,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:12,201 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:12,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 00:18:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 00:18:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 00:18:12,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:12,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940867496] [2021-12-22 00:18:12,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940867496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:12,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:12,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:18:12,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307611841] [2021-12-22 00:18:12,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:12,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:18:12,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:18:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:18:12,471 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:12,574 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-12-22 00:18:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:18:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-22 00:18:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:12,575 INFO L225 Difference]: With dead ends: 98 [2021-12-22 00:18:12,575 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 00:18:12,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:18:12,576 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 185 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:12,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:18:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 00:18:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 00:18:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.434782608695652) internal successors, (99), 91 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-12-22 00:18:12,578 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 45 [2021-12-22 00:18:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:12,579 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-12-22 00:18:12,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-12-22 00:18:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:18:12,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:12,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:12,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:12,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:12,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1027760007, now seen corresponding path program 1 times [2021-12-22 00:18:12,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:12,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360423154] [2021-12-22 00:18:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:12,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:12,790 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 00:18:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:12,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-22 00:18:12,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:13,022 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:13,140 INFO L387 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 [2021-12-22 00:18:13,260 INFO L387 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 9 treesize of output 5 [2021-12-22 00:18:13,272 INFO L387 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 7 treesize of output 3 [2021-12-22 00:18:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:13,542 INFO L387 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 14 treesize of output 16 [2021-12-22 00:18:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:13,554 INFO L387 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 16 treesize of output 18 [2021-12-22 00:18:13,579 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-22 00:18:13,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-12-22 00:18:13,764 INFO L387 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 17 treesize of output 9 [2021-12-22 00:18:13,769 INFO L387 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 [2021-12-22 00:18:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:18:14,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:18:15,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:15,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360423154] [2021-12-22 00:18:15,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360423154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:18:15,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031167948] [2021-12-22 00:18:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:15,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:18:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:18:15,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:18:15,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-22 00:18:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 00:18:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:15,739 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:15,746 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:16,351 INFO L387 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 22 treesize of output 14 [2021-12-22 00:18:16,358 INFO L387 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 7 treesize of output 3 [2021-12-22 00:18:16,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:16,883 INFO L387 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 28 treesize of output 28 [2021-12-22 00:18:16,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:16,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-12-22 00:18:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:16,906 INFO L387 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 14 treesize of output 16 [2021-12-22 00:18:16,918 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-22 00:18:16,919 INFO L387 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 18 treesize of output 18 [2021-12-22 00:18:17,130 INFO L387 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 25 treesize of output 13 [2021-12-22 00:18:17,134 INFO L387 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 [2021-12-22 00:18:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:18:17,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:18:17,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031167948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:18:17,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:18:17,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-22 00:18:17,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188180613] [2021-12-22 00:18:17,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:18:17,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 00:18:17,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 00:18:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1260, Unknown=13, NotChecked=0, Total=1406 [2021-12-22 00:18:17,979 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 00:18:19,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:19,356 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-12-22 00:18:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 00:18:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-12-22 00:18:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:19,357 INFO L225 Difference]: With dead ends: 99 [2021-12-22 00:18:19,357 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 00:18:19,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=208, Invalid=1843, Unknown=19, NotChecked=0, Total=2070 [2021-12-22 00:18:19,358 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 25 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:19,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 955 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 510 Invalid, 0 Unknown, 204 Unchecked, 0.7s Time] [2021-12-22 00:18:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 00:18:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-22 00:18:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-12-22 00:18:19,362 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 45 [2021-12-22 00:18:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:19,362 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-12-22 00:18:19,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 00:18:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-12-22 00:18:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:18:19,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:19,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:19,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:19,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:19,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-22 00:18:19,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1027760006, now seen corresponding path program 1 times [2021-12-22 00:18:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599221858] [2021-12-22 00:18:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:19,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:19,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:19,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:19,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 00:18:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 00:18:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:19,996 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:20,164 INFO L387 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 12 treesize of output 8 [2021-12-22 00:18:20,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:20,349 INFO L387 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 19 treesize of output 21 [2021-12-22 00:18:20,363 INFO L353 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-22 00:18:20,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 24 [2021-12-22 00:18:20,485 INFO L387 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 21 treesize of output 13 [2021-12-22 00:18:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:18:20,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:18:20,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599221858] [2021-12-22 00:18:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599221858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:18:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1619818104] [2021-12-22 00:18:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:20,881 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:18:20,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:18:20,882 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:18:20,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-22 00:18:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 00:18:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:21,242 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:21,520 INFO L387 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 12 treesize of output 8 [2021-12-22 00:18:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:21,809 INFO L387 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 19 treesize of output 21 [2021-12-22 00:18:21,830 INFO L353 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-22 00:18:21,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-22 00:18:22,002 INFO L387 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 28 treesize of output 16 [2021-12-22 00:18:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:18:22,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:18:22,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1619818104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:18:22,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:18:22,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-12-22 00:18:22,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945296878] [2021-12-22 00:18:22,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:18:22,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 00:18:22,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 00:18:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=926, Unknown=14, NotChecked=0, Total=1056 [2021-12-22 00:18:22,230 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 00:18:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:23,048 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2021-12-22 00:18:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:18:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-12-22 00:18:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:23,049 INFO L225 Difference]: With dead ends: 139 [2021-12-22 00:18:23,049 INFO L226 Difference]: Without dead ends: 139 [2021-12-22 00:18:23,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=1368, Unknown=20, NotChecked=0, Total=1560 [2021-12-22 00:18:23,050 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 57 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:23,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 776 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 399 Invalid, 0 Unknown, 208 Unchecked, 0.5s Time] [2021-12-22 00:18:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-22 00:18:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2021-12-22 00:18:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 92 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-12-22 00:18:23,053 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 45 [2021-12-22 00:18:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:23,053 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-12-22 00:18:23,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 00:18:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-12-22 00:18:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:18:23,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:23,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:23,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:23,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:23,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:23,457 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -312140221, now seen corresponding path program 1 times [2021-12-22 00:18:23,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:23,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499202956] [2021-12-22 00:18:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:23,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:23,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:23,459 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:23,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-22 00:18:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 00:18:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:23,638 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:23,720 INFO L387 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 11 treesize of output 7 [2021-12-22 00:18:23,735 INFO L387 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 17 treesize of output 9 [2021-12-22 00:18:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 00:18:23,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:23,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:23,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499202956] [2021-12-22 00:18:23,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499202956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:23,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:23,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:18:23,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446348351] [2021-12-22 00:18:23,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:23,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:18:23,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:18:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:18:23,757 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:24,294 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-12-22 00:18:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:18:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2021-12-22 00:18:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:24,295 INFO L225 Difference]: With dead ends: 148 [2021-12-22 00:18:24,295 INFO L226 Difference]: Without dead ends: 148 [2021-12-22 00:18:24,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:18:24,296 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 219 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:24,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 301 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:18:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-22 00:18:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-12-22 00:18:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 94 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-12-22 00:18:24,298 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 47 [2021-12-22 00:18:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:24,299 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-12-22 00:18:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-12-22 00:18:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:18:24,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:24,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:24,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:24,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:24,509 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash -312140220, now seen corresponding path program 1 times [2021-12-22 00:18:24,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:24,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490165762] [2021-12-22 00:18:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:24,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:24,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:24,511 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:24,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-22 00:18:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 00:18:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:24,697 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:24,819 INFO L387 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 11 treesize of output 7 [2021-12-22 00:18:24,823 INFO L387 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 11 treesize of output 7 [2021-12-22 00:18:24,846 INFO L387 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 [2021-12-22 00:18:24,849 INFO L387 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 17 treesize of output 9 [2021-12-22 00:18:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 00:18:24,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:24,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:24,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490165762] [2021-12-22 00:18:24,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490165762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:24,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:24,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:18:24,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720525688] [2021-12-22 00:18:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:24,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:18:24,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:18:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:18:24,882 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:25,433 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-12-22 00:18:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:18:25,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2021-12-22 00:18:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:25,434 INFO L225 Difference]: With dead ends: 159 [2021-12-22 00:18:25,435 INFO L226 Difference]: Without dead ends: 159 [2021-12-22 00:18:25,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-22 00:18:25,435 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 191 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:25,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 366 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:18:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-22 00:18:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-12-22 00:18:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 101 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-12-22 00:18:25,438 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 47 [2021-12-22 00:18:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:25,438 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-12-22 00:18:25,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:18:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-12-22 00:18:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:18:25,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:25,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:25,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:25,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:25,649 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash -165111632, now seen corresponding path program 1 times [2021-12-22 00:18:25,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:25,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41404149] [2021-12-22 00:18:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:25,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:25,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:25,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:25,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-22 00:18:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 00:18:25,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 00:18:25,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:25,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:25,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41404149] [2021-12-22 00:18:25,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41404149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:25,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:25,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:18:25,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597160162] [2021-12-22 00:18:25,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:18:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:18:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:18:25,840 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:18:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:25,940 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2021-12-22 00:18:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:18:25,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2021-12-22 00:18:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:25,941 INFO L225 Difference]: With dead ends: 136 [2021-12-22 00:18:25,941 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 00:18:25,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:18:25,941 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 45 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:25,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:18:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 00:18:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-12-22 00:18:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 99 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-12-22 00:18:25,944 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 47 [2021-12-22 00:18:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:25,944 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-12-22 00:18:25,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:18:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-12-22 00:18:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:18:25,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:25,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:25,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-22 00:18:26,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:26,159 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -165111631, now seen corresponding path program 1 times [2021-12-22 00:18:26,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:26,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475334966] [2021-12-22 00:18:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:26,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:26,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:26,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-22 00:18:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:26,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 00:18:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 00:18:26,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:18:26,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475334966] [2021-12-22 00:18:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475334966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:18:26,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:18:26,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:18:26,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262702818] [2021-12-22 00:18:26,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:18:26,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:18:26,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:18:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:18:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:18:26,366 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:18:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:18:26,547 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-22 00:18:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:18:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2021-12-22 00:18:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:18:26,548 INFO L225 Difference]: With dead ends: 136 [2021-12-22 00:18:26,548 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 00:18:26,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:18:26,549 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 46 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:18:26,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:18:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 00:18:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2021-12-22 00:18:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 97 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:18:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-12-22 00:18:26,551 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 47 [2021-12-22 00:18:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:18:26,552 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-12-22 00:18:26,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 00:18:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-12-22 00:18:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 00:18:26,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:18:26,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:18:26,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-22 00:18:26,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:18:26,760 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-22 00:18:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:18:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash 241565309, now seen corresponding path program 1 times [2021-12-22 00:18:26,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:18:26,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274059040] [2021-12-22 00:18:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:26,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:18:26,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:18:26,761 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 00:18:26,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-22 00:18:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-22 00:18:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:27,026 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:27,030 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:27,395 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:18:27,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-22 00:18:27,418 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 00:18:27,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-22 00:18:27,573 INFO L387 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 13 treesize of output 9 [2021-12-22 00:18:27,587 INFO L387 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 [2021-12-22 00:18:27,996 INFO L353 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-22 00:18:27,996 INFO L387 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 45 [2021-12-22 00:18:28,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-12-22 00:18:28,015 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:18:28,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 00:18:28,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-22 00:18:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:28,380 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-22 00:18:28,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 65 [2021-12-22 00:18:28,414 INFO L353 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-22 00:18:28,415 INFO L387 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 34 treesize of output 36 [2021-12-22 00:18:28,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 00:18:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:18:28,454 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:18:28,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-22 00:18:29,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 00:18:29,658 INFO L353 Elim1Store]: treesize reduction 15, result has 55.9 percent of original size [2021-12-22 00:18:29,659 INFO L387 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 62 [2021-12-22 00:18:29,678 INFO L353 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-22 00:18:29,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 29 [2021-12-22 00:18:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:18:29,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:18:32,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:18:32,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274059040] [2021-12-22 00:18:32,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274059040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:18:32,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1522377564] [2021-12-22 00:18:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:18:32,984 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:18:32,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:18:32,985 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:18:32,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-22 00:18:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:18:33,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-22 00:18:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:18:33,407 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:33,413 INFO L387 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:18:33,952 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 00:18:33,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-22 00:18:33,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-22 00:18:34,260 INFO L387 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 [2021-12-22 00:18:34,269 INFO L387 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 13 treesize of output 9 [2021-12-22 00:18:35,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:18:35,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2021-12-22 00:18:35,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-22 00:18:35,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-12-22 00:18:35,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 00:18:35,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7