./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a81d76a671fec08918102c7898e8919d02b265d05707efa1508363dab4714d44 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:56:21,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:56:21,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:56:21,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:56:21,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:56:21,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:56:21,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:56:21,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:56:21,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:56:21,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:56:21,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:56:21,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:56:21,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:56:21,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:56:21,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:56:21,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:56:21,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:56:21,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:56:21,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:56:21,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:56:21,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:56:21,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:56:21,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:56:21,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:56:21,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:56:21,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:56:21,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:56:21,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:56:21,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:56:21,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:56:21,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:56:21,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:56:21,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:56:21,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:56:21,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:56:21,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:56:21,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:56:21,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:56:21,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:56:21,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:56:21,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:56:21,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:56:21,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:56:21,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:56:21,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:56:21,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:56:21,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:56:21,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:56:21,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:56:21,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:56:21,899 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:56:21,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:56:21,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:56:21,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:56:21,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:56:21,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:56:21,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:56:21,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:56:21,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:56:21,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:56:21,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:56:21,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:56:21,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:56:21,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:56:21,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:56:21,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:56:21,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:56:21,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:56:21,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:56:21,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:56:21,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:56:21,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:56:21,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:56:21,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:56:21,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:56:21,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:56:21,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a81d76a671fec08918102c7898e8919d02b265d05707efa1508363dab4714d44 [2021-12-15 23:56:22,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:56:22,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:56:22,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:56:22,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:56:22,106 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:56:22,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2021-12-15 23:56:22,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c58dfec0/cf0972757acf47afb63b57eb0d5d2f82/FLAGc2db349cf [2021-12-15 23:56:22,495 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:56:22,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2021-12-15 23:56:22,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c58dfec0/cf0972757acf47afb63b57eb0d5d2f82/FLAGc2db349cf [2021-12-15 23:56:22,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c58dfec0/cf0972757acf47afb63b57eb0d5d2f82 [2021-12-15 23:56:22,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:56:22,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:56:22,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:56:22,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:56:22,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:56:22,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:56:22" (1/1) ... [2021-12-15 23:56:22,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73397a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:22, skipping insertion in model container [2021-12-15 23:56:22,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:56:22" (1/1) ... [2021-12-15 23:56:22,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:56:22,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:56:23,140 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/dll2c_remove_all_reverse.i[24177,24190] [2021-12-15 23:56:23,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:56:23,149 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:56:23,193 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/dll2c_remove_all_reverse.i[24177,24190] [2021-12-15 23:56:23,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:56:23,213 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:56:23,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23 WrapperNode [2021-12-15 23:56:23,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:56:23,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:56:23,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:56:23,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:56:23,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,246 INFO L137 Inliner]: procedures = 126, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 105 [2021-12-15 23:56:23,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:56:23,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:56:23,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:56:23,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:56:23,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:56:23,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:56:23,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:56:23,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:56:23,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (1/1) ... [2021-12-15 23:56:23,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:56:23,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:56:23,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:56:23,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:56:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 23:56:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-15 23:56:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-15 23:56:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:56:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:56:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 23:56:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:56:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:56:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:56:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 23:56:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:56:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:56:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:56:23,383 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:56:23,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:56:23,549 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:56:23,553 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:56:23,554 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 23:56:23,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:56:23 BoogieIcfgContainer [2021-12-15 23:56:23,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:56:23,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:56:23,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:56:23,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:56:23,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:56:22" (1/3) ... [2021-12-15 23:56:23,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c8e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:56:23, skipping insertion in model container [2021-12-15 23:56:23,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:56:23" (2/3) ... [2021-12-15 23:56:23,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c8e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:56:23, skipping insertion in model container [2021-12-15 23:56:23,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:56:23" (3/3) ... [2021-12-15 23:56:23,562 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.i [2021-12-15 23:56:23,566 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:56:23,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:56:23,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:56:23,600 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:56:23,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:56:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 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) [2021-12-15 23:56:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 23:56:23,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:23,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:23,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1539835526, now seen corresponding path program 1 times [2021-12-15 23:56:23,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:23,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965845708] [2021-12-15 23:56:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:23,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:23,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:56:23,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965845708] [2021-12-15 23:56:23,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965845708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:56:23,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:56:23,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:56:23,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785498386] [2021-12-15 23:56:23,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:56:23,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:56:23,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:56:23,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:56:23,811 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 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, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-12-15 23:56:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:23,852 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-12-15 23:56:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:56:23,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 16 [2021-12-15 23:56:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:23,861 INFO L225 Difference]: With dead ends: 41 [2021-12-15 23:56:23,862 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 23:56:23,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:56:23,867 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:23,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:56:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 23:56:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-15 23:56:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2021-12-15 23:56:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-15 23:56:23,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-12-15 23:56:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:23,903 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-15 23:56:23,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-12-15 23:56:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-15 23:56:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 23:56:23,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:23,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:23,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:56:23,906 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1407777735, now seen corresponding path program 1 times [2021-12-15 23:56:23,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:23,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833419282] [2021-12-15 23:56:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:23,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:56:24,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833419282] [2021-12-15 23:56:24,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833419282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:56:24,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:56:24,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:56:24,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991657745] [2021-12-15 23:56:24,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:56:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:56:24,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:56:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:56:24,042 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-12-15 23:56:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:24,072 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-15 23:56:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:56:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2021-12-15 23:56:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:24,074 INFO L225 Difference]: With dead ends: 39 [2021-12-15 23:56:24,074 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 23:56:24,077 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 [2021-12-15 23:56:24,079 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:24,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:56:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 23:56:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-15 23:56:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-12-15 23:56:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-15 23:56:24,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2021-12-15 23:56:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:24,091 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-15 23:56:24,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-12-15 23:56:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-15 23:56:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 23:56:24,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:24,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:24,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:56:24,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1822611693, now seen corresponding path program 1 times [2021-12-15 23:56:24,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:24,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918464883] [2021-12-15 23:56:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:24,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 23:56:24,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:24,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918464883] [2021-12-15 23:56:24,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918464883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:56:24,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:56:24,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 23:56:24,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427416739] [2021-12-15 23:56:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:56:24,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:56:24,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:56:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:56:24,196 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-15 23:56:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:24,227 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-12-15 23:56:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:56:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 26 [2021-12-15 23:56:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:24,228 INFO L225 Difference]: With dead ends: 33 [2021-12-15 23:56:24,228 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 23:56:24,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:56:24,229 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:24,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:56:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 23:56:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-15 23:56:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-12-15 23:56:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 23:56:24,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 26 [2021-12-15 23:56:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:24,233 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 23:56:24,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-15 23:56:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 23:56:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 23:56:24,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:24,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:24,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:56:24,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash -346016110, now seen corresponding path program 1 times [2021-12-15 23:56:24,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496990613] [2021-12-15 23:56:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:24,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 23:56:24,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496990613] [2021-12-15 23:56:24,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496990613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:56:24,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804519605] [2021-12-15 23:56:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:24,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:24,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:56:24,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:56:24,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:56:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:56:24,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:56:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 23:56:24,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:56:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 23:56:24,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804519605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:56:24,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:56:24,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-15 23:56:24,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228810536] [2021-12-15 23:56:24,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:56:24,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 23:56:24,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 23:56:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-15 23:56:24,669 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 23:56:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:24,713 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-12-15 23:56:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 23:56:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-12-15 23:56:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:24,714 INFO L225 Difference]: With dead ends: 34 [2021-12-15 23:56:24,714 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 23:56:24,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-15 23:56:24,715 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:24,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:56:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 23:56:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-15 23:56:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-12-15 23:56:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-15 23:56:24,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 30 [2021-12-15 23:56:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:24,719 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-15 23:56:24,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 23:56:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-15 23:56:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 23:56:24,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:24,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:24,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:56:24,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:24,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash -348374601, now seen corresponding path program 2 times [2021-12-15 23:56:24,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:24,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561118009] [2021-12-15 23:56:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:24,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 23:56:25,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:25,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561118009] [2021-12-15 23:56:25,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561118009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:56:25,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:56:25,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 23:56:25,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840612214] [2021-12-15 23:56:25,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:56:25,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 23:56:25,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 23:56:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:56:25,030 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-12-15 23:56:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:25,093 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-15 23:56:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 23:56:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 34 [2021-12-15 23:56:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:25,095 INFO L225 Difference]: With dead ends: 41 [2021-12-15 23:56:25,095 INFO L226 Difference]: Without dead ends: 37 [2021-12-15 23:56:25,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:56:25,098 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:25,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 93 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:56:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-15 23:56:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-12-15 23:56:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-12-15 23:56:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-15 23:56:25,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2021-12-15 23:56:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:25,107 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-15 23:56:25,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-12-15 23:56:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-15 23:56:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 23:56:25,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:25,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:25,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:56:25,110 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1426632761, now seen corresponding path program 1 times [2021-12-15 23:56:25,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:25,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245634882] [2021-12-15 23:56:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:25,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 23:56:25,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:25,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245634882] [2021-12-15 23:56:25,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245634882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:56:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548074647] [2021-12-15 23:56:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:25,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:25,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:56:25,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:56:25,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:56:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-15 23:56:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:56:25,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:56:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:56:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:25,671 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-12-15 23:56:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 91 [2021-12-15 23:56:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:25,699 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-15 23:56:25,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 60 [2021-12-15 23:56:25,838 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-15 23:56:25,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 37 [2021-12-15 23:56:25,860 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-12-15 23:56:25,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 41 [2021-12-15 23:56:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 23:56:25,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:56:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548074647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:56:25,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:56:25,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-12-15 23:56:25,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743468952] [2021-12-15 23:56:25,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:56:25,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 23:56:25,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 23:56:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 23:56:25,871 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-12-15 23:56:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:25,973 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-15 23:56:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 23:56:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 34 [2021-12-15 23:56:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:25,974 INFO L225 Difference]: With dead ends: 45 [2021-12-15 23:56:25,974 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 23:56:25,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-15 23:56:25,975 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:25,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 106 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 23:56:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 23:56:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-15 23:56:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-12-15 23:56:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-15 23:56:25,978 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 34 [2021-12-15 23:56:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:25,978 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-15 23:56:25,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-12-15 23:56:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-15 23:56:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 23:56:25,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:25,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:56:25,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 23:56:26,183 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,SelfDestructingSolverStorable5 [2021-12-15 23:56:26,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2127697339, now seen corresponding path program 1 times [2021-12-15 23:56:26,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:26,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343876409] [2021-12-15 23:56:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:26,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:56:26,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:26,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343876409] [2021-12-15 23:56:26,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343876409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:56:26,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403783498] [2021-12-15 23:56:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:26,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:26,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:56:26,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:56:26,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:56:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-15 23:56:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:56:27,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 23:56:27,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-15 23:56:27,486 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 23:56:27,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-15 23:56:27,499 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 23:56:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-15 23:56:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 23:56:27,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:56:27,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 23:56:27,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-15 23:56:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:27,747 INFO L388 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 0 case distinctions, treesize of input 88 treesize of output 83 [2021-12-15 23:56:27,759 INFO L354 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2021-12-15 23:56:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 102 [2021-12-15 23:56:27,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 51 [2021-12-15 23:56:27,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 90 [2021-12-15 23:56:27,775 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 140 [2021-12-15 23:56:27,779 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 140 [2021-12-15 23:56:27,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-15 23:56:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 23:56:27,804 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 23:56:27,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-12-15 23:56:27,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-12-15 23:56:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 23:56:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:28,087 INFO L354 Elim1Store]: treesize reduction 327, result has 11.1 percent of original size [2021-12-15 23:56:28,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 22 case distinctions, treesize of input 540 treesize of output 210 [2021-12-15 23:56:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:28,114 INFO L354 Elim1Store]: treesize reduction 98, result has 13.3 percent of original size [2021-12-15 23:56:28,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 134 treesize of output 91 [2021-12-15 23:56:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 23:56:28,254 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-12-15 23:56:28,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 123 treesize of output 64 [2021-12-15 23:56:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:28,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:28,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 21 [2021-12-15 23:56:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:56:28,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:56:56,713 WARN L227 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-15 23:56:58,144 INFO L354 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2021-12-15 23:56:58,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20239 treesize of output 12933 [2021-12-15 23:56:58,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:58,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24322 treesize of output 23942 [2021-12-15 23:56:58,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:58,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23942 treesize of output 22985