./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0214_1.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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:54:02,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:54:02,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:54:02,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:54:02,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:54:02,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:54:02,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:54:02,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:54:02,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:54:02,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:54:02,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:54:02,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:54:02,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:54:02,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:54:02,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:54:02,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:54:02,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:54:02,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:54:02,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:54:02,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:54:02,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:54:02,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:54:02,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:54:02,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:54:02,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:54:02,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:54:02,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:54:02,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:54:02,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:54:02,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:54:02,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:54:02,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:54:02,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:54:02,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:54:02,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:54:02,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:54:02,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:54:02,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:54:02,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:54:02,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:54:02,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:54:02,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:54:02,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:54:02,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:54:02,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:54:02,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:54:02,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:54:02,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:54:02,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:54:02,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:54:02,974 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:54:02,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:54:02,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:54:02,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:54:02,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:54:02,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:54:02,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:54:02,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:54:02,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:54:02,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:54:02,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:54:02,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:54:02,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:54:02,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:54:02,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:54:02,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:54:02,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2021-12-18 20:54:03,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:54:03,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:54:03,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:54:03,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:54:03,183 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:54:03,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2021-12-18 20:54:03,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e15b0629b/502f0b6ecd3d458a91a84dd2288b3de8/FLAG2a3cf5284 [2021-12-18 20:54:03,669 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:54:03,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2021-12-18 20:54:03,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e15b0629b/502f0b6ecd3d458a91a84dd2288b3de8/FLAG2a3cf5284 [2021-12-18 20:54:03,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e15b0629b/502f0b6ecd3d458a91a84dd2288b3de8 [2021-12-18 20:54:03,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:54:03,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:54:03,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:54:03,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:54:03,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:54:03,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:54:03" (1/1) ... [2021-12-18 20:54:03,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a522dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:03, skipping insertion in model container [2021-12-18 20:54:03,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:54:03" (1/1) ... [2021-12-18 20:54:03,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:54:03,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:54:04,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:54:04,034 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:54:04,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:54:04,103 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:54:04,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04 WrapperNode [2021-12-18 20:54:04,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:54:04,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:54:04,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:54:04,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:54:04,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,168 INFO L137 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 223 [2021-12-18 20:54:04,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:54:04,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:54:04,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:54:04,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:54:04,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:54:04,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:54:04,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:54:04,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:54:04,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (1/1) ... [2021-12-18 20:54:04,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:54:04,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:04,240 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) [2021-12-18 20:54:04,258 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 [2021-12-18 20:54:04,267 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-18 20:54:04,267 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:54:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 20:54:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 20:54:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:54:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:54:04,373 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:54:04,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:54:04,751 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:54:04,757 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:54:04,758 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 20:54:04,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:54:04 BoogieIcfgContainer [2021-12-18 20:54:04,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:54:04,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:54:04,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:54:04,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:54:04,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:54:03" (1/3) ... [2021-12-18 20:54:04,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a7acc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:54:04, skipping insertion in model container [2021-12-18 20:54:04,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:04" (2/3) ... [2021-12-18 20:54:04,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a7acc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:54:04, skipping insertion in model container [2021-12-18 20:54:04,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:54:04" (3/3) ... [2021-12-18 20:54:04,788 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2021-12-18 20:54:04,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:54:04,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2021-12-18 20:54:04,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:54:04,834 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 [2021-12-18 20:54:04,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2021-12-18 20:54:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 147 states have internal predecessors, (173), 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) [2021-12-18 20:54:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 20:54:04,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:04,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 20:54:04,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1044596682, now seen corresponding path program 1 times [2021-12-18 20:54:04,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:04,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721596165] [2021-12-18 20:54:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:04,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:04,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721596165] [2021-12-18 20:54:04,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721596165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:04,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:04,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:04,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904081851] [2021-12-18 20:54:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:04,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 20:54:04,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 20:54:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 20:54:05,012 INFO L87 Difference]: Start difference. First operand has 151 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 147 states have internal predecessors, (173), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:05,046 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2021-12-18 20:54:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 20:54:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 20:54:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:05,058 INFO L225 Difference]: With dead ends: 151 [2021-12-18 20:54:05,058 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 20:54:05,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 20:54:05,080 INFO L933 BasicCegarLoop]: 172 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, 172 SdHoareTripleChecker+Invalid, 0 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 [2021-12-18 20:54:05,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 20:54:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-18 20:54:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 144 states have internal predecessors, (164), 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) [2021-12-18 20:54:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2021-12-18 20:54:05,146 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 6 [2021-12-18 20:54:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:05,147 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2021-12-18 20:54:05,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2021-12-18 20:54:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:05,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:05,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:05,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:54:05,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 594339757, now seen corresponding path program 1 times [2021-12-18 20:54:05,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:05,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611954499] [2021-12-18 20:54:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:05,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:05,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611954499] [2021-12-18 20:54:05,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611954499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:05,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:05,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:05,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590342102] [2021-12-18 20:54:05,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:05,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:05,244 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:05,320 INFO L93 Difference]: Finished difference Result 294 states and 333 transitions. [2021-12-18 20:54:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 20:54:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:05,324 INFO L225 Difference]: With dead ends: 294 [2021-12-18 20:54:05,325 INFO L226 Difference]: Without dead ends: 294 [2021-12-18 20:54:05,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:05,329 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 163 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:05,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 485 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:05,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-18 20:54:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 150. [2021-12-18 20:54:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.8444444444444446) internal successors, (166), 146 states have internal predecessors, (166), 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) [2021-12-18 20:54:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-12-18 20:54:05,339 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 8 [2021-12-18 20:54:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:05,340 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-12-18 20:54:05,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-12-18 20:54:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:05,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:05,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:05,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:54:05,341 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:05,342 INFO L85 PathProgramCache]: Analyzing trace with hash 592492715, now seen corresponding path program 1 times [2021-12-18 20:54:05,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:05,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618763774] [2021-12-18 20:54:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:05,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:05,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618763774] [2021-12-18 20:54:05,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618763774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:05,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 20:54:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424209424] [2021-12-18 20:54:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:05,428 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:05,572 INFO L93 Difference]: Finished difference Result 289 states and 328 transitions. [2021-12-18 20:54:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 20:54:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:05,575 INFO L225 Difference]: With dead ends: 289 [2021-12-18 20:54:05,575 INFO L226 Difference]: Without dead ends: 289 [2021-12-18 20:54:05,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:05,582 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 148 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:05,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 223 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-18 20:54:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 203. [2021-12-18 20:54:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 140 states have (on average 1.8285714285714285) internal successors, (256), 196 states have internal predecessors, (256), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:54:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 264 transitions. [2021-12-18 20:54:05,599 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 264 transitions. Word has length 8 [2021-12-18 20:54:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:05,599 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 264 transitions. [2021-12-18 20:54:05,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 264 transitions. [2021-12-18 20:54:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:05,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:05,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:05,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 20:54:05,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash 592492716, now seen corresponding path program 1 times [2021-12-18 20:54:05,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:05,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709364173] [2021-12-18 20:54:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:05,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:05,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:05,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709364173] [2021-12-18 20:54:05,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709364173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:05,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671275278] [2021-12-18 20:54:05,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:05,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:05,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:05,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:05,715 INFO L87 Difference]: Start difference. First operand 203 states and 264 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:05,849 INFO L93 Difference]: Finished difference Result 360 states and 454 transitions. [2021-12-18 20:54:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 20:54:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:05,851 INFO L225 Difference]: With dead ends: 360 [2021-12-18 20:54:05,851 INFO L226 Difference]: Without dead ends: 360 [2021-12-18 20:54:05,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:05,852 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 151 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:05,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 371 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-18 20:54:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2021-12-18 20:54:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 219 states have (on average 1.7945205479452055) internal successors, (393), 277 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 409 transitions. [2021-12-18 20:54:05,862 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 409 transitions. Word has length 8 [2021-12-18 20:54:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:05,862 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 409 transitions. [2021-12-18 20:54:05,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 409 transitions. [2021-12-18 20:54:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:05,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:05,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:05,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:54:05,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash 592492778, now seen corresponding path program 1 times [2021-12-18 20:54:05,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414970366] [2021-12-18 20:54:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:05,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:05,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414970366] [2021-12-18 20:54:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414970366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:05,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:05,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:05,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020303613] [2021-12-18 20:54:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:05,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:05,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:05,934 INFO L87 Difference]: Start difference. First operand 288 states and 409 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:06,083 INFO L93 Difference]: Finished difference Result 359 states and 452 transitions. [2021-12-18 20:54:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 20:54:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:06,086 INFO L225 Difference]: With dead ends: 359 [2021-12-18 20:54:06,086 INFO L226 Difference]: Without dead ends: 359 [2021-12-18 20:54:06,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:06,087 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 133 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:06,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 385 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-18 20:54:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 288. [2021-12-18 20:54:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 219 states have (on average 1.7945205479452055) internal successors, (393), 277 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 409 transitions. [2021-12-18 20:54:06,099 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 409 transitions. Word has length 8 [2021-12-18 20:54:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:06,099 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 409 transitions. [2021-12-18 20:54:06,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 409 transitions. [2021-12-18 20:54:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 20:54:06,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:06,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:06,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 20:54:06,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1364890281, now seen corresponding path program 1 times [2021-12-18 20:54:06,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:06,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662117896] [2021-12-18 20:54:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:06,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:06,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662117896] [2021-12-18 20:54:06,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662117896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:06,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:06,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:06,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050285792] [2021-12-18 20:54:06,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:06,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:06,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:06,128 INFO L87 Difference]: Start difference. First operand 288 states and 409 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:06,140 INFO L93 Difference]: Finished difference Result 391 states and 509 transitions. [2021-12-18 20:54:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 20:54:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:06,143 INFO L225 Difference]: With dead ends: 391 [2021-12-18 20:54:06,143 INFO L226 Difference]: Without dead ends: 391 [2021-12-18 20:54:06,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:06,144 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 139 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:06,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 328 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-18 20:54:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 290. [2021-12-18 20:54:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 221 states have (on average 1.7782805429864252) internal successors, (393), 279 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 409 transitions. [2021-12-18 20:54:06,152 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 409 transitions. Word has length 11 [2021-12-18 20:54:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:06,153 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 409 transitions. [2021-12-18 20:54:06,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 409 transitions. [2021-12-18 20:54:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 20:54:06,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:06,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:06,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 20:54:06,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash 638072979, now seen corresponding path program 1 times [2021-12-18 20:54:06,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:06,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715306635] [2021-12-18 20:54:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:06,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:06,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715306635] [2021-12-18 20:54:06,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715306635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:06,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:06,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:06,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482577923] [2021-12-18 20:54:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:06,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:06,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:06,189 INFO L87 Difference]: Start difference. First operand 290 states and 409 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:06,283 INFO L93 Difference]: Finished difference Result 349 states and 466 transitions. [2021-12-18 20:54:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 20:54:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:06,286 INFO L225 Difference]: With dead ends: 349 [2021-12-18 20:54:06,286 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 20:54:06,287 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 [2021-12-18 20:54:06,287 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 81 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:06,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 251 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 20:54:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 287. [2021-12-18 20:54:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7798165137614679) internal successors, (388), 276 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 404 transitions. [2021-12-18 20:54:06,295 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 404 transitions. Word has length 12 [2021-12-18 20:54:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:06,295 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 404 transitions. [2021-12-18 20:54:06,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 404 transitions. [2021-12-18 20:54:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:54:06,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:06,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:06,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 20:54:06,297 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:06,298 INFO L85 PathProgramCache]: Analyzing trace with hash -529439982, now seen corresponding path program 1 times [2021-12-18 20:54:06,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:06,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340428413] [2021-12-18 20:54:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:06,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:06,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:06,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340428413] [2021-12-18 20:54:06,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340428413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:06,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:06,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:06,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826452107] [2021-12-18 20:54:06,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:06,327 INFO L87 Difference]: Start difference. First operand 287 states and 404 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:54:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:06,347 INFO L93 Difference]: Finished difference Result 451 states and 620 transitions. [2021-12-18 20:54:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2021-12-18 20:54:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:06,349 INFO L225 Difference]: With dead ends: 451 [2021-12-18 20:54:06,349 INFO L226 Difference]: Without dead ends: 451 [2021-12-18 20:54:06,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:06,350 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 153 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:06,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 470 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-18 20:54:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 291. [2021-12-18 20:54:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.7567567567567568) internal successors, (390), 280 states have internal predecessors, (390), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 406 transitions. [2021-12-18 20:54:06,359 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 406 transitions. Word has length 14 [2021-12-18 20:54:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:06,359 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 406 transitions. [2021-12-18 20:54:06,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:54:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 406 transitions. [2021-12-18 20:54:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:54:06,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:06,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:06,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 20:54:06,361 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash 279906644, now seen corresponding path program 1 times [2021-12-18 20:54:06,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:06,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156674403] [2021-12-18 20:54:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:06,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:06,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:06,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156674403] [2021-12-18 20:54:06,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156674403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:06,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:06,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:06,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958092246] [2021-12-18 20:54:06,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:06,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:06,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:06,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:06,401 INFO L87 Difference]: Start difference. First operand 291 states and 406 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:54:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:06,610 INFO L93 Difference]: Finished difference Result 422 states and 514 transitions. [2021-12-18 20:54:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2021-12-18 20:54:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:06,614 INFO L225 Difference]: With dead ends: 422 [2021-12-18 20:54:06,614 INFO L226 Difference]: Without dead ends: 422 [2021-12-18 20:54:06,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:06,616 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 281 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:06,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 381 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-18 20:54:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 291. [2021-12-18 20:54:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.7297297297297298) internal successors, (384), 280 states have internal predecessors, (384), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 400 transitions. [2021-12-18 20:54:06,624 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 400 transitions. Word has length 14 [2021-12-18 20:54:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:06,624 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 400 transitions. [2021-12-18 20:54:06,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:54:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 400 transitions. [2021-12-18 20:54:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:54:06,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:06,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:06,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 20:54:06,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 279906645, now seen corresponding path program 1 times [2021-12-18 20:54:06,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:06,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698303499] [2021-12-18 20:54:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:06,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:06,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:06,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698303499] [2021-12-18 20:54:06,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698303499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:06,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:06,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:06,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782499233] [2021-12-18 20:54:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:06,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:06,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:06,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:06,720 INFO L87 Difference]: Start difference. First operand 291 states and 400 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:54:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:06,892 INFO L93 Difference]: Finished difference Result 331 states and 409 transitions. [2021-12-18 20:54:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:54:06,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2021-12-18 20:54:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:06,894 INFO L225 Difference]: With dead ends: 331 [2021-12-18 20:54:06,894 INFO L226 Difference]: Without dead ends: 331 [2021-12-18 20:54:06,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:06,896 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 103 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:06,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 661 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-18 20:54:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 295. [2021-12-18 20:54:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 226 states have (on average 1.7212389380530972) internal successors, (389), 282 states have internal predecessors, (389), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 405 transitions. [2021-12-18 20:54:06,905 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 405 transitions. Word has length 14 [2021-12-18 20:54:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:06,905 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 405 transitions. [2021-12-18 20:54:06,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:54:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 405 transitions. [2021-12-18 20:54:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:54:06,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:06,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:06,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 20:54:06,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1443078130, now seen corresponding path program 1 times [2021-12-18 20:54:06,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:06,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873300850] [2021-12-18 20:54:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:06,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:06,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873300850] [2021-12-18 20:54:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873300850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:06,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:06,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:06,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592452974] [2021-12-18 20:54:06,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:06,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:06,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:06,986 INFO L87 Difference]: Start difference. First operand 295 states and 405 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 20:54:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:07,186 INFO L93 Difference]: Finished difference Result 482 states and 619 transitions. [2021-12-18 20:54:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:07,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17 [2021-12-18 20:54:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:07,189 INFO L225 Difference]: With dead ends: 482 [2021-12-18 20:54:07,189 INFO L226 Difference]: Without dead ends: 482 [2021-12-18 20:54:07,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:07,190 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 272 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:07,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 388 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-18 20:54:07,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 301. [2021-12-18 20:54:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 232 states have (on average 1.7025862068965518) internal successors, (395), 288 states have internal predecessors, (395), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 411 transitions. [2021-12-18 20:54:07,198 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 411 transitions. Word has length 17 [2021-12-18 20:54:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 411 transitions. [2021-12-18 20:54:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 20:54:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 411 transitions. [2021-12-18 20:54:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:54:07,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:07,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:07,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 20:54:07,200 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:07,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1443078131, now seen corresponding path program 1 times [2021-12-18 20:54:07,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:07,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341913791] [2021-12-18 20:54:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:07,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:07,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341913791] [2021-12-18 20:54:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341913791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:07,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:07,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:07,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047438880] [2021-12-18 20:54:07,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:07,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:07,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:07,260 INFO L87 Difference]: Start difference. First operand 301 states and 411 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 20:54:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:07,374 INFO L93 Difference]: Finished difference Result 350 states and 431 transitions. [2021-12-18 20:54:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17 [2021-12-18 20:54:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:07,377 INFO L225 Difference]: With dead ends: 350 [2021-12-18 20:54:07,377 INFO L226 Difference]: Without dead ends: 350 [2021-12-18 20:54:07,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:07,379 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 190 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:07,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 392 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-18 20:54:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 301. [2021-12-18 20:54:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 232 states have (on average 1.6767241379310345) internal successors, (389), 288 states have internal predecessors, (389), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 405 transitions. [2021-12-18 20:54:07,398 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 405 transitions. Word has length 17 [2021-12-18 20:54:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:07,400 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 405 transitions. [2021-12-18 20:54:07,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 20:54:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 405 transitions. [2021-12-18 20:54:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 20:54:07,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:07,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:07,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 20:54:07,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 534459326, now seen corresponding path program 1 times [2021-12-18 20:54:07,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:07,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447841156] [2021-12-18 20:54:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:07,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:07,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447841156] [2021-12-18 20:54:07,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447841156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:07,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:07,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:07,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072056202] [2021-12-18 20:54:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:07,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:07,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:07,449 INFO L87 Difference]: Start difference. First operand 301 states and 405 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-12-18 20:54:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:07,522 INFO L93 Difference]: Finished difference Result 397 states and 512 transitions. [2021-12-18 20:54:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:07,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20 [2021-12-18 20:54:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:07,524 INFO L225 Difference]: With dead ends: 397 [2021-12-18 20:54:07,524 INFO L226 Difference]: Without dead ends: 397 [2021-12-18 20:54:07,525 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 [2021-12-18 20:54:07,526 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 141 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:07,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 281 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-18 20:54:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 298. [2021-12-18 20:54:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 232 states have (on average 1.6508620689655173) internal successors, (383), 285 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 399 transitions. [2021-12-18 20:54:07,536 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 399 transitions. Word has length 20 [2021-12-18 20:54:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:07,537 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 399 transitions. [2021-12-18 20:54:07,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-12-18 20:54:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 399 transitions. [2021-12-18 20:54:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 20:54:07,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:07,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:07,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 20:54:07,538 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:07,539 INFO L85 PathProgramCache]: Analyzing trace with hash 534459327, now seen corresponding path program 1 times [2021-12-18 20:54:07,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:07,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973010962] [2021-12-18 20:54:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:07,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:07,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:07,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973010962] [2021-12-18 20:54:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973010962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:07,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:07,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:07,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686895194] [2021-12-18 20:54:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:07,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:07,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:07,609 INFO L87 Difference]: Start difference. First operand 298 states and 399 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-18 20:54:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:07,733 INFO L93 Difference]: Finished difference Result 517 states and 636 transitions. [2021-12-18 20:54:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2021-12-18 20:54:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:07,735 INFO L225 Difference]: With dead ends: 517 [2021-12-18 20:54:07,735 INFO L226 Difference]: Without dead ends: 517 [2021-12-18 20:54:07,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:07,736 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 376 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:07,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 456 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-18 20:54:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 301. [2021-12-18 20:54:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 236 states have (on average 1.63135593220339) internal successors, (385), 288 states have internal predecessors, (385), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 401 transitions. [2021-12-18 20:54:07,741 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 401 transitions. Word has length 20 [2021-12-18 20:54:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:07,742 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 401 transitions. [2021-12-18 20:54:07,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-18 20:54:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 401 transitions. [2021-12-18 20:54:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 20:54:07,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:07,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:07,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 20:54:07,742 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash -611630038, now seen corresponding path program 1 times [2021-12-18 20:54:07,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:07,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308850822] [2021-12-18 20:54:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:07,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:07,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308850822] [2021-12-18 20:54:07,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308850822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:07,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:07,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:07,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050407656] [2021-12-18 20:54:07,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:07,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:07,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:07,793 INFO L87 Difference]: Start difference. First operand 301 states and 401 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-12-18 20:54:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:07,898 INFO L93 Difference]: Finished difference Result 516 states and 634 transitions. [2021-12-18 20:54:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 21 [2021-12-18 20:54:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:07,900 INFO L225 Difference]: With dead ends: 516 [2021-12-18 20:54:07,900 INFO L226 Difference]: Without dead ends: 516 [2021-12-18 20:54:07,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:07,903 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 442 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:07,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 407 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-18 20:54:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-12-18 20:54:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 238 states have (on average 1.6260504201680672) internal successors, (387), 290 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 403 transitions. [2021-12-18 20:54:07,910 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 403 transitions. Word has length 21 [2021-12-18 20:54:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:07,910 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 403 transitions. [2021-12-18 20:54:07,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-12-18 20:54:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 403 transitions. [2021-12-18 20:54:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 20:54:07,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:07,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:07,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 20:54:07,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:07,911 INFO L85 PathProgramCache]: Analyzing trace with hash -611574334, now seen corresponding path program 1 times [2021-12-18 20:54:07,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:07,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756291563] [2021-12-18 20:54:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:07,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:07,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756291563] [2021-12-18 20:54:07,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756291563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:07,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:07,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 20:54:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977120538] [2021-12-18 20:54:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:07,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:07,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:07,988 INFO L87 Difference]: Start difference. First operand 303 states and 403 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-18 20:54:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:08,033 INFO L93 Difference]: Finished difference Result 336 states and 405 transitions. [2021-12-18 20:54:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2021-12-18 20:54:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:08,036 INFO L225 Difference]: With dead ends: 336 [2021-12-18 20:54:08,036 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 20:54:08,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:08,036 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 348 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:08,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1144 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 20:54:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 303. [2021-12-18 20:54:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 238 states have (on average 1.6176470588235294) internal successors, (385), 290 states have internal predecessors, (385), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 401 transitions. [2021-12-18 20:54:08,041 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 401 transitions. Word has length 21 [2021-12-18 20:54:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:08,041 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 401 transitions. [2021-12-18 20:54:08,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-18 20:54:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 401 transitions. [2021-12-18 20:54:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 20:54:08,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:08,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:08,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 20:54:08,042 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash -611572412, now seen corresponding path program 1 times [2021-12-18 20:54:08,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:08,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972328713] [2021-12-18 20:54:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:08,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:08,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972328713] [2021-12-18 20:54:08,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972328713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:08,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:08,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 20:54:08,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813031844] [2021-12-18 20:54:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:08,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:08,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:08,129 INFO L87 Difference]: Start difference. First operand 303 states and 401 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-18 20:54:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:08,191 INFO L93 Difference]: Finished difference Result 326 states and 391 transitions. [2021-12-18 20:54:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2021-12-18 20:54:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:08,194 INFO L225 Difference]: With dead ends: 326 [2021-12-18 20:54:08,194 INFO L226 Difference]: Without dead ends: 326 [2021-12-18 20:54:08,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:08,195 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 337 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:08,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1134 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:08,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-18 20:54:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 293. [2021-12-18 20:54:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 230 states have (on average 1.6130434782608696) internal successors, (371), 280 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 20:54:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 387 transitions. [2021-12-18 20:54:08,203 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 387 transitions. Word has length 21 [2021-12-18 20:54:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:08,204 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 387 transitions. [2021-12-18 20:54:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-18 20:54:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 387 transitions. [2021-12-18 20:54:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:54:08,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:08,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:08,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 20:54:08,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1215813558, now seen corresponding path program 1 times [2021-12-18 20:54:08,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319960713] [2021-12-18 20:54:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:08,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:08,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:08,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319960713] [2021-12-18 20:54:08,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319960713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:08,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:08,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 20:54:08,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185656268] [2021-12-18 20:54:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:08,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:54:08,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:54:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:08,561 INFO L87 Difference]: Start difference. First operand 293 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-12-18 20:54:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:09,030 INFO L93 Difference]: Finished difference Result 410 states and 523 transitions. [2021-12-18 20:54:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 20:54:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 23 [2021-12-18 20:54:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:09,031 INFO L225 Difference]: With dead ends: 410 [2021-12-18 20:54:09,031 INFO L226 Difference]: Without dead ends: 408 [2021-12-18 20:54:09,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:09,032 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 253 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:09,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 905 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-18 20:54:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 345. [2021-12-18 20:54:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 277 states have (on average 1.5884476534296028) internal successors, (440), 328 states have internal predecessors, (440), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:54:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 462 transitions. [2021-12-18 20:54:09,037 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 462 transitions. Word has length 23 [2021-12-18 20:54:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:09,037 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 462 transitions. [2021-12-18 20:54:09,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-12-18 20:54:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 462 transitions. [2021-12-18 20:54:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:54:09,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:09,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:09,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 20:54:09,038 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 173365089, now seen corresponding path program 1 times [2021-12-18 20:54:09,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:09,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939447784] [2021-12-18 20:54:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:09,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:09,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:09,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939447784] [2021-12-18 20:54:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939447784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:09,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:09,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755323132] [2021-12-18 20:54:09,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:09,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:09,068 INFO L87 Difference]: Start difference. First operand 345 states and 462 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-12-18 20:54:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:09,208 INFO L93 Difference]: Finished difference Result 520 states and 673 transitions. [2021-12-18 20:54:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 25 [2021-12-18 20:54:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:09,210 INFO L225 Difference]: With dead ends: 520 [2021-12-18 20:54:09,210 INFO L226 Difference]: Without dead ends: 520 [2021-12-18 20:54:09,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:09,210 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 236 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:09,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 372 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-18 20:54:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 377. [2021-12-18 20:54:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 309 states have (on average 1.6181229773462784) internal successors, (500), 360 states have internal predecessors, (500), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:54:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 522 transitions. [2021-12-18 20:54:09,216 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 522 transitions. Word has length 25 [2021-12-18 20:54:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:09,217 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 522 transitions. [2021-12-18 20:54:09,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-12-18 20:54:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 522 transitions. [2021-12-18 20:54:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:54:09,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:09,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:09,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 20:54:09,217 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 173365090, now seen corresponding path program 1 times [2021-12-18 20:54:09,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:09,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415006215] [2021-12-18 20:54:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:09,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:09,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415006215] [2021-12-18 20:54:09,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415006215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:09,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:09,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:09,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193192587] [2021-12-18 20:54:09,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:09,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:09,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:09,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:09,301 INFO L87 Difference]: Start difference. First operand 377 states and 522 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-12-18 20:54:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:09,480 INFO L93 Difference]: Finished difference Result 428 states and 544 transitions. [2021-12-18 20:54:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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 25 [2021-12-18 20:54:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:09,482 INFO L225 Difference]: With dead ends: 428 [2021-12-18 20:54:09,482 INFO L226 Difference]: Without dead ends: 428 [2021-12-18 20:54:09,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:09,482 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 267 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:09,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 564 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-18 20:54:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 377. [2021-12-18 20:54:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 309 states have (on average 1.5792880258899675) internal successors, (488), 360 states have internal predecessors, (488), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:54:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 510 transitions. [2021-12-18 20:54:09,487 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 510 transitions. Word has length 25 [2021-12-18 20:54:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:09,487 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 510 transitions. [2021-12-18 20:54:09,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-12-18 20:54:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 510 transitions. [2021-12-18 20:54:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:54:09,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:09,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:09,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 20:54:09,488 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -560017875, now seen corresponding path program 1 times [2021-12-18 20:54:09,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:09,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208265175] [2021-12-18 20:54:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:09,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:09,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208265175] [2021-12-18 20:54:09,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208265175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:09,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:09,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 20:54:09,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784016274] [2021-12-18 20:54:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:09,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:09,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:09,603 INFO L87 Difference]: Start difference. First operand 377 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-18 20:54:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:09,837 INFO L93 Difference]: Finished difference Result 667 states and 867 transitions. [2021-12-18 20:54:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 25 [2021-12-18 20:54:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:09,839 INFO L225 Difference]: With dead ends: 667 [2021-12-18 20:54:09,839 INFO L226 Difference]: Without dead ends: 667 [2021-12-18 20:54:09,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:54:09,840 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 391 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:09,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 1187 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-18 20:54:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 439. [2021-12-18 20:54:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 368 states have (on average 1.546195652173913) internal successors, (569), 419 states have internal predecessors, (569), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 20:54:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 595 transitions. [2021-12-18 20:54:09,846 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 595 transitions. Word has length 25 [2021-12-18 20:54:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:09,846 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 595 transitions. [2021-12-18 20:54:09,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-18 20:54:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 595 transitions. [2021-12-18 20:54:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 20:54:09,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:09,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:09,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 20:54:09,847 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:09,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1306109328, now seen corresponding path program 1 times [2021-12-18 20:54:09,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759358487] [2021-12-18 20:54:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:09,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:09,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759358487] [2021-12-18 20:54:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759358487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:09,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:09,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:09,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043906372] [2021-12-18 20:54:09,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:09,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:09,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:09,930 INFO L87 Difference]: Start difference. First operand 439 states and 595 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-12-18 20:54:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:10,145 INFO L93 Difference]: Finished difference Result 552 states and 696 transitions. [2021-12-18 20:54:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:54:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 27 [2021-12-18 20:54:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:10,147 INFO L225 Difference]: With dead ends: 552 [2021-12-18 20:54:10,147 INFO L226 Difference]: Without dead ends: 552 [2021-12-18 20:54:10,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:10,147 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 991 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:10,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 372 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-12-18 20:54:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 455. [2021-12-18 20:54:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 389 states have (on average 1.5295629820051413) internal successors, (595), 434 states have internal predecessors, (595), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 623 transitions. [2021-12-18 20:54:10,155 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 623 transitions. Word has length 27 [2021-12-18 20:54:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 623 transitions. [2021-12-18 20:54:10,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-12-18 20:54:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 623 transitions. [2021-12-18 20:54:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 20:54:10,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:10,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:10,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 20:54:10,156 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1834683473, now seen corresponding path program 1 times [2021-12-18 20:54:10,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:10,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762977759] [2021-12-18 20:54:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:10,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:10,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762977759] [2021-12-18 20:54:10,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762977759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:10,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:10,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:10,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938343314] [2021-12-18 20:54:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:10,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:10,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:10,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:10,220 INFO L87 Difference]: Start difference. First operand 455 states and 623 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-12-18 20:54:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:10,330 INFO L93 Difference]: Finished difference Result 480 states and 621 transitions. [2021-12-18 20:54:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 28 [2021-12-18 20:54:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:10,332 INFO L225 Difference]: With dead ends: 480 [2021-12-18 20:54:10,332 INFO L226 Difference]: Without dead ends: 480 [2021-12-18 20:54:10,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:10,333 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 420 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:10,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 875 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-18 20:54:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 453. [2021-12-18 20:54:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 389 states have (on average 1.519280205655527) internal successors, (591), 432 states have internal predecessors, (591), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 619 transitions. [2021-12-18 20:54:10,339 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 619 transitions. Word has length 28 [2021-12-18 20:54:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:10,339 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 619 transitions. [2021-12-18 20:54:10,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-12-18 20:54:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 619 transitions. [2021-12-18 20:54:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 20:54:10,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:10,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:10,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 20:54:10,341 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1486279512, now seen corresponding path program 1 times [2021-12-18 20:54:10,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:10,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975337029] [2021-12-18 20:54:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:10,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:10,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:10,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975337029] [2021-12-18 20:54:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975337029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:10,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:10,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:10,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896348716] [2021-12-18 20:54:10,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:10,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:10,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:10,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:10,385 INFO L87 Difference]: Start difference. First operand 453 states and 619 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-12-18 20:54:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:10,484 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2021-12-18 20:54:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 29 [2021-12-18 20:54:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:10,486 INFO L225 Difference]: With dead ends: 518 [2021-12-18 20:54:10,486 INFO L226 Difference]: Without dead ends: 518 [2021-12-18 20:54:10,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:10,486 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 168 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:10,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 560 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-12-18 20:54:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 453. [2021-12-18 20:54:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 389 states have (on average 1.5141388174807198) internal successors, (589), 432 states have internal predecessors, (589), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 617 transitions. [2021-12-18 20:54:10,493 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 617 transitions. Word has length 29 [2021-12-18 20:54:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:10,493 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 617 transitions. [2021-12-18 20:54:10,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-12-18 20:54:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 617 transitions. [2021-12-18 20:54:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 20:54:10,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:10,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:10,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 20:54:10,501 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1169975593, now seen corresponding path program 1 times [2021-12-18 20:54:10,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:10,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451473905] [2021-12-18 20:54:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:10,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:10,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451473905] [2021-12-18 20:54:10,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451473905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:10,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:10,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:10,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303374345] [2021-12-18 20:54:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:10,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:10,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:10,581 INFO L87 Difference]: Start difference. First operand 453 states and 617 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-12-18 20:54:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:10,726 INFO L93 Difference]: Finished difference Result 565 states and 746 transitions. [2021-12-18 20:54:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:54:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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 30 [2021-12-18 20:54:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:10,728 INFO L225 Difference]: With dead ends: 565 [2021-12-18 20:54:10,728 INFO L226 Difference]: Without dead ends: 565 [2021-12-18 20:54:10,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:10,729 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 161 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:10,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 513 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-18 20:54:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 493. [2021-12-18 20:54:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 426 states have (on average 1.5046948356807512) internal successors, (641), 470 states have internal predecessors, (641), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 20:54:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 673 transitions. [2021-12-18 20:54:10,738 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 673 transitions. Word has length 30 [2021-12-18 20:54:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:10,739 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 673 transitions. [2021-12-18 20:54:10,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-12-18 20:54:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 673 transitions. [2021-12-18 20:54:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 20:54:10,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:10,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:10,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-18 20:54:10,740 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2100742417, now seen corresponding path program 1 times [2021-12-18 20:54:10,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083591959] [2021-12-18 20:54:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:10,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:10,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:10,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083591959] [2021-12-18 20:54:10,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083591959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:10,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:10,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304633311] [2021-12-18 20:54:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:10,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:10,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:10,835 INFO L87 Difference]: Start difference. First operand 493 states and 673 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2021-12-18 20:54:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:11,072 INFO L93 Difference]: Finished difference Result 589 states and 740 transitions. [2021-12-18 20:54:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:54:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 30 [2021-12-18 20:54:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:11,075 INFO L225 Difference]: With dead ends: 589 [2021-12-18 20:54:11,075 INFO L226 Difference]: Without dead ends: 589 [2021-12-18 20:54:11,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:11,075 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 755 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:11,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 372 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-18 20:54:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 494. [2021-12-18 20:54:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 428 states have (on average 1.4953271028037383) internal successors, (640), 470 states have internal predecessors, (640), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-18 20:54:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 674 transitions. [2021-12-18 20:54:11,083 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 674 transitions. Word has length 30 [2021-12-18 20:54:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:11,083 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 674 transitions. [2021-12-18 20:54:11,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2021-12-18 20:54:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 674 transitions. [2021-12-18 20:54:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:54:11,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:11,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:11,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-18 20:54:11,084 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -252550768, now seen corresponding path program 1 times [2021-12-18 20:54:11,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618285122] [2021-12-18 20:54:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:11,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:11,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:11,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618285122] [2021-12-18 20:54:11,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618285122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:11,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:11,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:11,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861684105] [2021-12-18 20:54:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:11,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:11,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:11,127 INFO L87 Difference]: Start difference. First operand 494 states and 674 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-12-18 20:54:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:11,147 INFO L93 Difference]: Finished difference Result 584 states and 781 transitions. [2021-12-18 20:54:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 32 [2021-12-18 20:54:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:11,150 INFO L225 Difference]: With dead ends: 584 [2021-12-18 20:54:11,150 INFO L226 Difference]: Without dead ends: 584 [2021-12-18 20:54:11,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:11,151 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 196 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:11,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 634 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-18 20:54:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 494. [2021-12-18 20:54:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 428 states have (on average 1.485981308411215) internal successors, (636), 470 states have internal predecessors, (636), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-18 20:54:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 670 transitions. [2021-12-18 20:54:11,160 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 670 transitions. Word has length 32 [2021-12-18 20:54:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:11,161 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 670 transitions. [2021-12-18 20:54:11,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-12-18 20:54:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 670 transitions. [2021-12-18 20:54:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:54:11,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:11,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:11,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-18 20:54:11,162 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -252548846, now seen corresponding path program 1 times [2021-12-18 20:54:11,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:11,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762538799] [2021-12-18 20:54:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:11,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:11,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762538799] [2021-12-18 20:54:11,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762538799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:11,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:11,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:11,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966360932] [2021-12-18 20:54:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:11,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:11,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:11,228 INFO L87 Difference]: Start difference. First operand 494 states and 670 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-12-18 20:54:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:11,391 INFO L93 Difference]: Finished difference Result 752 states and 987 transitions. [2021-12-18 20:54:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 32 [2021-12-18 20:54:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:11,395 INFO L225 Difference]: With dead ends: 752 [2021-12-18 20:54:11,395 INFO L226 Difference]: Without dead ends: 752 [2021-12-18 20:54:11,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:11,396 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 462 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:11,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1008 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-12-18 20:54:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 491. [2021-12-18 20:54:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 428 states have (on average 1.4532710280373833) internal successors, (622), 467 states have internal predecessors, (622), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-18 20:54:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 656 transitions. [2021-12-18 20:54:11,405 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 656 transitions. Word has length 32 [2021-12-18 20:54:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:11,405 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 656 transitions. [2021-12-18 20:54:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-12-18 20:54:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 656 transitions. [2021-12-18 20:54:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:54:11,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:11,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:11,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-18 20:54:11,406 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash -934879925, now seen corresponding path program 1 times [2021-12-18 20:54:11,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:11,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276100025] [2021-12-18 20:54:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:11,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:11,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276100025] [2021-12-18 20:54:11,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276100025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:11,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:11,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:11,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161629181] [2021-12-18 20:54:11,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:11,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:11,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:11,499 INFO L87 Difference]: Start difference. First operand 491 states and 656 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-12-18 20:54:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:11,886 INFO L93 Difference]: Finished difference Result 931 states and 1223 transitions. [2021-12-18 20:54:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 32 [2021-12-18 20:54:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:11,889 INFO L225 Difference]: With dead ends: 931 [2021-12-18 20:54:11,889 INFO L226 Difference]: Without dead ends: 931 [2021-12-18 20:54:11,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:54:11,889 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 351 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:11,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 834 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-18 20:54:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 560. [2021-12-18 20:54:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 491 states have (on average 1.4358452138492872) internal successors, (705), 532 states have internal predecessors, (705), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-18 20:54:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 747 transitions. [2021-12-18 20:54:11,906 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 747 transitions. Word has length 32 [2021-12-18 20:54:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:11,906 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 747 transitions. [2021-12-18 20:54:11,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-12-18 20:54:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 747 transitions. [2021-12-18 20:54:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 20:54:11,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:11,907 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] [2021-12-18 20:54:11,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 20:54:11,908 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1427861429, now seen corresponding path program 1 times [2021-12-18 20:54:11,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:11,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997319335] [2021-12-18 20:54:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:11,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:54:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:11,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:11,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997319335] [2021-12-18 20:54:11,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997319335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:11,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816690811] [2021-12-18 20:54:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:11,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:11,948 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) [2021-12-18 20:54:11,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:54:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 20:54:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:54:12,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:12,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816690811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:12,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:12,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-18 20:54:12,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427837679] [2021-12-18 20:54:12,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:12,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:12,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:12,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:12,113 INFO L87 Difference]: Start difference. First operand 560 states and 747 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-12-18 20:54:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:12,134 INFO L93 Difference]: Finished difference Result 569 states and 755 transitions. [2021-12-18 20:54:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2021-12-18 20:54:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:12,136 INFO L225 Difference]: With dead ends: 569 [2021-12-18 20:54:12,136 INFO L226 Difference]: Without dead ends: 568 [2021-12-18 20:54:12,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:12,137 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:12,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 281 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-12-18 20:54:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 564. [2021-12-18 20:54:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 495 states have (on average 1.4303030303030304) internal successors, (708), 536 states have internal predecessors, (708), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-18 20:54:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 750 transitions. [2021-12-18 20:54:12,144 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 750 transitions. Word has length 33 [2021-12-18 20:54:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:12,144 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 750 transitions. [2021-12-18 20:54:12,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-12-18 20:54:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 750 transitions. [2021-12-18 20:54:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 20:54:12,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:12,145 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] [2021-12-18 20:54:12,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:12,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:12,363 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2049457417, now seen corresponding path program 1 times [2021-12-18 20:54:12,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:12,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217911092] [2021-12-18 20:54:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:12,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:12,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:54:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:12,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217911092] [2021-12-18 20:54:12,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217911092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:12,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:12,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 20:54:12,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700648023] [2021-12-18 20:54:12,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:12,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:54:12,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:54:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:12,663 INFO L87 Difference]: Start difference. First operand 564 states and 750 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2021-12-18 20:54:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:13,123 INFO L93 Difference]: Finished difference Result 599 states and 775 transitions. [2021-12-18 20:54:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:54:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 33 [2021-12-18 20:54:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:13,125 INFO L225 Difference]: With dead ends: 599 [2021-12-18 20:54:13,125 INFO L226 Difference]: Without dead ends: 597 [2021-12-18 20:54:13,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:54:13,126 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 270 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:13,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1052 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-18 20:54:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 521. [2021-12-18 20:54:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 455 states have (on average 1.421978021978022) internal successors, (647), 495 states have internal predecessors, (647), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-18 20:54:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 685 transitions. [2021-12-18 20:54:13,133 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 685 transitions. Word has length 33 [2021-12-18 20:54:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:13,133 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 685 transitions. [2021-12-18 20:54:13,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2021-12-18 20:54:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 685 transitions. [2021-12-18 20:54:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 20:54:13,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-18 20:54:13,133 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1083493612, now seen corresponding path program 1 times [2021-12-18 20:54:13,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445720408] [2021-12-18 20:54:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:13,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:13,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445720408] [2021-12-18 20:54:13,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445720408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:13,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:13,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:13,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563527828] [2021-12-18 20:54:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:13,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:13,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:13,272 INFO L87 Difference]: Start difference. First operand 521 states and 685 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-12-18 20:54:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:13,536 INFO L93 Difference]: Finished difference Result 788 states and 988 transitions. [2021-12-18 20:54:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:13,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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 33 [2021-12-18 20:54:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:13,538 INFO L225 Difference]: With dead ends: 788 [2021-12-18 20:54:13,538 INFO L226 Difference]: Without dead ends: 788 [2021-12-18 20:54:13,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:13,539 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 485 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:13,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 644 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-12-18 20:54:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 521. [2021-12-18 20:54:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 455 states have (on average 1.410989010989011) internal successors, (642), 495 states have internal predecessors, (642), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-18 20:54:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 680 transitions. [2021-12-18 20:54:13,546 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 680 transitions. Word has length 33 [2021-12-18 20:54:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:13,547 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 680 transitions. [2021-12-18 20:54:13,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-12-18 20:54:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 680 transitions. [2021-12-18 20:54:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 20:54:13,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-18 20:54:13,548 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2113699762, now seen corresponding path program 1 times [2021-12-18 20:54:13,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260757657] [2021-12-18 20:54:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:13,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260757657] [2021-12-18 20:54:13,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260757657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:13,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:13,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:13,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17091714] [2021-12-18 20:54:13,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:13,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:13,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:13,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:13,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:13,701 INFO L87 Difference]: Start difference. First operand 521 states and 680 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:13,975 INFO L93 Difference]: Finished difference Result 559 states and 721 transitions. [2021-12-18 20:54:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 34 [2021-12-18 20:54:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:13,977 INFO L225 Difference]: With dead ends: 559 [2021-12-18 20:54:13,977 INFO L226 Difference]: Without dead ends: 559 [2021-12-18 20:54:13,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:13,977 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 99 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:13,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 680 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-12-18 20:54:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 521. [2021-12-18 20:54:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 455 states have (on average 1.4065934065934067) internal successors, (640), 495 states have internal predecessors, (640), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-18 20:54:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 678 transitions. [2021-12-18 20:54:13,984 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 678 transitions. Word has length 34 [2021-12-18 20:54:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 678 transitions. [2021-12-18 20:54:13,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 678 transitions. [2021-12-18 20:54:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 20:54:13,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,985 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-18 20:54:13,985 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,986 INFO L85 PathProgramCache]: Analyzing trace with hash 949188435, now seen corresponding path program 1 times [2021-12-18 20:54:13,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751066425] [2021-12-18 20:54:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 20:54:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:54:14,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751066425] [2021-12-18 20:54:14,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751066425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:14,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698168550] [2021-12-18 20:54:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:14,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:14,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,089 INFO L87 Difference]: Start difference. First operand 521 states and 678 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2021-12-18 20:54:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,094 INFO L93 Difference]: Finished difference Result 523 states and 680 transitions. [2021-12-18 20:54:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 41 [2021-12-18 20:54:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,096 INFO L225 Difference]: With dead ends: 523 [2021-12-18 20:54:14,096 INFO L226 Difference]: Without dead ends: 523 [2021-12-18 20:54:14,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,097 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-18 20:54:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-12-18 20:54:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 457 states have (on average 1.4048140043763677) internal successors, (642), 497 states have internal predecessors, (642), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-18 20:54:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 680 transitions. [2021-12-18 20:54:14,103 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 680 transitions. Word has length 41 [2021-12-18 20:54:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,103 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 680 transitions. [2021-12-18 20:54:14,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2021-12-18 20:54:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 680 transitions. [2021-12-18 20:54:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 20:54:14,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,103 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-18 20:54:14,104 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1758535061, now seen corresponding path program 1 times [2021-12-18 20:54:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931468872] [2021-12-18 20:54:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-18 20:54:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:14,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931468872] [2021-12-18 20:54:14,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931468872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371695007] [2021-12-18 20:54:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:14,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:14,432 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) [2021-12-18 20:54:14,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:54:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 20:54:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:14,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:54:14,953 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 29 treesize of output 33 [2021-12-18 20:54:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:15,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371695007] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:15,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:15,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 27 [2021-12-18 20:54:15,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224972538] [2021-12-18 20:54:15,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 20:54:15,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 20:54:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-12-18 20:54:15,210 INFO L87 Difference]: Start difference. First operand 523 states and 680 transitions. Second operand has 28 states, 27 states have (on average 4.111111111111111) internal successors, (111), 24 states have internal predecessors, (111), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 20:54:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:15,553 INFO L93 Difference]: Finished difference Result 548 states and 680 transitions. [2021-12-18 20:54:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:15,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.111111111111111) internal successors, (111), 24 states have internal predecessors, (111), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2021-12-18 20:54:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:15,556 INFO L225 Difference]: With dead ends: 548 [2021-12-18 20:54:15,556 INFO L226 Difference]: Without dead ends: 548 [2021-12-18 20:54:15,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-12-18 20:54:15,557 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 907 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:15,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 1629 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-18 20:54:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 520. [2021-12-18 20:54:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 455 states have (on average 1.3978021978021977) internal successors, (636), 495 states have internal predecessors, (636), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-18 20:54:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 674 transitions. [2021-12-18 20:54:15,564 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 674 transitions. Word has length 41 [2021-12-18 20:54:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:15,564 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 674 transitions. [2021-12-18 20:54:15,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.111111111111111) internal successors, (111), 24 states have internal predecessors, (111), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 20:54:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 674 transitions. [2021-12-18 20:54:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 20:54:15,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:15,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:15,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:15,766 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,SelfDestructingSolverStorable34 [2021-12-18 20:54:15,766 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1516271307, now seen corresponding path program 1 times [2021-12-18 20:54:15,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70366380] [2021-12-18 20:54:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:15,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 20:54:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70366380] [2021-12-18 20:54:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70366380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:15,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569138580] [2021-12-18 20:54:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:15,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:15,805 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) [2021-12-18 20:54:15,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:54:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:54:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:15,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:16,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569138580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:16,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:16,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-18 20:54:16,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749392128] [2021-12-18 20:54:16,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:16,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:16,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:16,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:16,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:16,013 INFO L87 Difference]: Start difference. First operand 520 states and 674 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 20:54:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:16,064 INFO L93 Difference]: Finished difference Result 1212 states and 1554 transitions. [2021-12-18 20:54:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2021-12-18 20:54:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:16,072 INFO L225 Difference]: With dead ends: 1212 [2021-12-18 20:54:16,073 INFO L226 Difference]: Without dead ends: 1212 [2021-12-18 20:54:16,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:16,073 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1015 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:16,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 721 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-12-18 20:54:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 682. [2021-12-18 20:54:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 611 states have (on average 1.3551554828150574) internal successors, (828), 651 states have internal predecessors, (828), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-18 20:54:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 878 transitions. [2021-12-18 20:54:16,086 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 878 transitions. Word has length 44 [2021-12-18 20:54:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:16,086 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 878 transitions. [2021-12-18 20:54:16,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 20:54:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 878 transitions. [2021-12-18 20:54:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 20:54:16,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:16,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:16,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 20:54:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:16,303 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2077631411, now seen corresponding path program 1 times [2021-12-18 20:54:16,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:16,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452572566] [2021-12-18 20:54:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:16,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 20:54:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:16,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452572566] [2021-12-18 20:54:16,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452572566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190223179] [2021-12-18 20:54:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:16,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:16,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:16,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:16,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:54:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 20:54:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:16,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190223179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:16,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:16,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2021-12-18 20:54:16,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734809618] [2021-12-18 20:54:16,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:16,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:16,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:16,820 INFO L87 Difference]: Start difference. First operand 682 states and 878 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:17,012 INFO L93 Difference]: Finished difference Result 876 states and 1086 transitions. [2021-12-18 20:54:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 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 44 [2021-12-18 20:54:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:17,015 INFO L225 Difference]: With dead ends: 876 [2021-12-18 20:54:17,015 INFO L226 Difference]: Without dead ends: 876 [2021-12-18 20:54:17,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:54:17,016 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 517 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:17,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 371 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-18 20:54:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 679. [2021-12-18 20:54:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 611 states have (on average 1.3420621931260228) internal successors, (820), 648 states have internal predecessors, (820), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-18 20:54:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 870 transitions. [2021-12-18 20:54:17,025 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 870 transitions. Word has length 44 [2021-12-18 20:54:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:17,025 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 870 transitions. [2021-12-18 20:54:17,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 870 transitions. [2021-12-18 20:54:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 20:54:17,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:17,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:17,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:17,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 20:54:17,244 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash 990140495, now seen corresponding path program 1 times [2021-12-18 20:54:17,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:17,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289734906] [2021-12-18 20:54:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:17,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:17,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-18 20:54:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:17,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289734906] [2021-12-18 20:54:17,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289734906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617560300] [2021-12-18 20:54:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:17,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:17,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:17,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:17,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:54:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:17,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:54:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:17,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:17,653 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:54:17,653 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 12 treesize of output 11 [2021-12-18 20:54:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:17,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617560300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:17,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:17,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-18 20:54:17,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895882653] [2021-12-18 20:54:17,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:17,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:54:17,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:54:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:17,696 INFO L87 Difference]: Start difference. First operand 679 states and 870 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:54:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:18,209 INFO L93 Difference]: Finished difference Result 2182 states and 2719 transitions. [2021-12-18 20:54:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 20:54:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2021-12-18 20:54:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:18,217 INFO L225 Difference]: With dead ends: 2182 [2021-12-18 20:54:18,217 INFO L226 Difference]: Without dead ends: 2182 [2021-12-18 20:54:18,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:54:18,218 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 2071 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:18,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 992 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-12-18 20:54:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 859. [2021-12-18 20:54:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 783 states have (on average 1.293742017879949) internal successors, (1013), 816 states have internal predecessors, (1013), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-18 20:54:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1085 transitions. [2021-12-18 20:54:18,237 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1085 transitions. Word has length 46 [2021-12-18 20:54:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1085 transitions. [2021-12-18 20:54:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:54:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1085 transitions. [2021-12-18 20:54:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 20:54:18,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:18,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:18,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:18,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 20:54:18,458 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash -201066803, now seen corresponding path program 1 times [2021-12-18 20:54:18,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:18,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065571800] [2021-12-18 20:54:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:18,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:18,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065571800] [2021-12-18 20:54:18,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065571800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136542290] [2021-12-18 20:54:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:18,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:18,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:18,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:54:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:54:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:18,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:18,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136542290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:18,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:18,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2021-12-18 20:54:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992342917] [2021-12-18 20:54:18,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:18,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:18,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:18,706 INFO L87 Difference]: Start difference. First operand 859 states and 1085 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2021-12-18 20:54:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:18,754 INFO L93 Difference]: Finished difference Result 2800 states and 3518 transitions. [2021-12-18 20:54:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) Word has length 45 [2021-12-18 20:54:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:18,762 INFO L225 Difference]: With dead ends: 2800 [2021-12-18 20:54:18,762 INFO L226 Difference]: Without dead ends: 2800 [2021-12-18 20:54:18,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:54:18,763 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 363 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:18,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 763 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-12-18 20:54:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1952. [2021-12-18 20:54:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1816 states have (on average 1.2890969162995596) internal successors, (2341), 1853 states have internal predecessors, (2341), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-18 20:54:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2497 transitions. [2021-12-18 20:54:18,799 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2497 transitions. Word has length 45 [2021-12-18 20:54:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:18,799 INFO L470 AbstractCegarLoop]: Abstraction has 1952 states and 2497 transitions. [2021-12-18 20:54:18,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2021-12-18 20:54:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2497 transitions. [2021-12-18 20:54:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 20:54:18,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:18,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:18,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:19,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 20:54:19,013 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash -202913845, now seen corresponding path program 1 times [2021-12-18 20:54:19,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:19,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883942315] [2021-12-18 20:54:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:19,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:19,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883942315] [2021-12-18 20:54:19,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883942315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254038570] [2021-12-18 20:54:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:19,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:19,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:19,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:54:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:54:19,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:19,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254038570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:19,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:19,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2021-12-18 20:54:19,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366872832] [2021-12-18 20:54:19,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:54:19,669 INFO L87 Difference]: Start difference. First operand 1952 states and 2497 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2021-12-18 20:54:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:19,790 INFO L93 Difference]: Finished difference Result 2000 states and 2528 transitions. [2021-12-18 20:54:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2021-12-18 20:54:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:19,795 INFO L225 Difference]: With dead ends: 2000 [2021-12-18 20:54:19,795 INFO L226 Difference]: Without dead ends: 2000 [2021-12-18 20:54:19,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:54:19,795 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 533 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:19,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 371 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-12-18 20:54:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1954. [2021-12-18 20:54:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1818 states have (on average 1.2893289328932893) internal successors, (2344), 1855 states have internal predecessors, (2344), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-18 20:54:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2500 transitions. [2021-12-18 20:54:19,817 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2500 transitions. Word has length 45 [2021-12-18 20:54:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:19,817 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 2500 transitions. [2021-12-18 20:54:19,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2021-12-18 20:54:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2500 transitions. [2021-12-18 20:54:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 20:54:19,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:19,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:19,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:20,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:20,034 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -202913783, now seen corresponding path program 1 times [2021-12-18 20:54:20,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:20,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933388877] [2021-12-18 20:54:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:20,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:20,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933388877] [2021-12-18 20:54:20,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933388877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:20,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137263823] [2021-12-18 20:54:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:20,182 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:20,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:54:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:54:20,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:20,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:20,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137263823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:20,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:20,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2021-12-18 20:54:20,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840698786] [2021-12-18 20:54:20,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:20,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:20,602 INFO L87 Difference]: Start difference. First operand 1954 states and 2500 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2021-12-18 20:54:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:20,725 INFO L93 Difference]: Finished difference Result 1999 states and 2526 transitions. [2021-12-18 20:54:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2021-12-18 20:54:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:20,730 INFO L225 Difference]: With dead ends: 1999 [2021-12-18 20:54:20,731 INFO L226 Difference]: Without dead ends: 1999 [2021-12-18 20:54:20,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:54:20,731 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 348 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:20,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 460 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2021-12-18 20:54:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1951. [2021-12-18 20:54:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1816 states have (on average 1.2879955947136563) internal successors, (2339), 1852 states have internal predecessors, (2339), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-18 20:54:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2495 transitions. [2021-12-18 20:54:20,754 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2495 transitions. Word has length 45 [2021-12-18 20:54:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:20,754 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 2495 transitions. [2021-12-18 20:54:20,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2021-12-18 20:54:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2495 transitions. [2021-12-18 20:54:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 20:54:20,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:20,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:20,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:20,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-18 20:54:20,974 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:54:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1987177000, now seen corresponding path program 1 times [2021-12-18 20:54:20,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740606939] [2021-12-18 20:54:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:21,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:21,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740606939] [2021-12-18 20:54:21,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740606939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:21,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270616476] [2021-12-18 20:54:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:21,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:21,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:21,336 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) [2021-12-18 20:54:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:54:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 20:54:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:21,672 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 20:54:21,673 INFO L388 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 21 [2021-12-18 20:54:21,807 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 [2021-12-18 20:54:21,821 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 [2021-12-18 20:54:21,836 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 [2021-12-18 20:54:21,848 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 [2021-12-18 20:54:21,868 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 [2021-12-18 20:54:21,877 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 [2021-12-18 20:54:22,108 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:54:22,108 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 1 case distinctions, treesize of input 23 treesize of output 30 [2021-12-18 20:54:22,127 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:54:22,128 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 23 treesize of output 30 [2021-12-18 20:54:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 20:54:22,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:22,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-12-18 20:54:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:22,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:24,716 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) |c_ULTIMATE.start_append_one_~item~1#1.base|)) (.cse1 (* ~unnamed1~0~LIST_BEG 4))) (or (and (= 0 (select .cse0 (+ .cse1 |c_ULTIMATE.start_append_one_~list#1.offset|))) (forall ((v_ArrVal_513 Int)) (= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) v_ArrVal_513) (+ (* ~unnamed1~0~LIST_BEG 4) |c_ULTIMATE.start_append_one_~list#1.offset|))))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| .cse0) |c_~#list~0.base|) (+ .cse1 |c_~#list~0.offset|))) 1)))) is different from false [2021-12-18 20:54:26,739 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) |c_ULTIMATE.start_create_item_#res#1.base|)) (.cse1 (* ~unnamed1~0~LIST_BEG 4))) (or (and (= 0 (select .cse0 (+ .cse1 |c_ULTIMATE.start_append_one_~list#1.offset|))) (forall ((v_ArrVal_513 Int)) (= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) v_ArrVal_513) (+ (* ~unnamed1~0~LIST_BEG 4) |c_ULTIMATE.start_append_one_~list#1.offset|))))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| .cse0) |c_~#list~0.base|) (+ .cse1 |c_~#list~0.offset|))) 1)))) is different from false [2021-12-18 20:54:28,760 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) |c_ULTIMATE.start_create_item_~head~0#1.base|)) (.cse1 (* ~unnamed1~0~LIST_BEG 4))) (or (and (= 0 (select .cse0 (+ .cse1 |c_ULTIMATE.start_append_one_~list#1.offset|))) (forall ((v_ArrVal_513 Int)) (= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) v_ArrVal_513) (+ (* ~unnamed1~0~LIST_BEG 4) |c_ULTIMATE.start_append_one_~list#1.offset|))))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| .cse0) |c_~#list~0.base|) (+ .cse1 |c_~#list~0.offset|))) 1)))) is different from false [2021-12-18 20:54:56,936 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_508 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_508))) (let ((.cse0 (store (select .cse2 |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse1 (* ~unnamed1~0~LIST_BEG 4))) (or (and (= 0 (select .cse0 (+ .cse1 |c_ULTIMATE.start_append_one_~list#1.offset|))) (forall ((v_ArrVal_509 (Array Int Int)) (v_ArrVal_513 Int)) (= 0 (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_509) |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) v_ArrVal_513) (+ (* ~unnamed1~0~LIST_BEG 4) |c_ULTIMATE.start_append_one_~list#1.offset|))))) (= (select |c_#valid| (select (select (store .cse2 |c_ULTIMATE.start_append_one_~list#1.base| .cse0) |c_~#list~0.base|) (+ .cse1 |c_~#list~0.offset|))) 1))))) is different from false [2021-12-18 20:54:56,966 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_508 (Array Int Int)) (|ULTIMATE.start_append_one_~to#1| Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_508))) (let ((.cse0 (store (select .cse2 |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse1 (* ~unnamed1~0~LIST_BEG 4))) (or (and (forall ((v_ArrVal_509 (Array Int Int)) (v_ArrVal_513 Int)) (= 0 (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_509) |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* |ULTIMATE.start_append_one_~to#1| 4)) v_ArrVal_513) (+ (* ~unnamed1~0~LIST_BEG 4) |c_ULTIMATE.start_append_one_~list#1.offset|)))) (= 0 (select .cse0 (+ .cse1 |c_ULTIMATE.start_append_one_~list#1.offset|)))) (= (select |c_#valid| (select (select (store .cse2 |c_ULTIMATE.start_append_one_~list#1.base| .cse0) |c_~#list~0.base|) (+ .cse1 |c_~#list~0.offset|))) 1))))) is different from false [2021-12-18 20:55:01,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270616476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:01,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:55:01,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-12-18 20:55:01,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928726303] [2021-12-18 20:55:01,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:01,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 20:55:01,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 20:55:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1022, Unknown=23, NotChecked=350, Total=1560 [2021-12-18 20:55:01,458 INFO L87 Difference]: Start difference. First operand 1951 states and 2495 transitions. Second operand has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 28 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:08,760 INFO L93 Difference]: Finished difference Result 3271 states and 4183 transitions. [2021-12-18 20:55:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 20:55:08,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 28 states have internal predecessors, (92), 2 states have call successors, (2), 2 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 48 [2021-12-18 20:55:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:08,766 INFO L225 Difference]: With dead ends: 3271 [2021-12-18 20:55:08,767 INFO L226 Difference]: Without dead ends: 3271 [2021-12-18 20:55:08,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=492, Invalid=2473, Unknown=25, NotChecked=550, Total=3540 [2021-12-18 20:55:08,768 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 797 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:08,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 2019 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1132 Invalid, 0 Unknown, 140 Unchecked, 0.6s Time] [2021-12-18 20:55:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2021-12-18 20:55:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 2695. [2021-12-18 20:55:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2507 states have (on average 1.3027522935779816) internal successors, (3266), 2555 states have internal predecessors, (3266), 116 states have call successors, (116), 46 states have call predecessors, (116), 46 states have return successors, (116), 93 states have call predecessors, (116), 116 states have call successors, (116) [2021-12-18 20:55:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3498 transitions. [2021-12-18 20:55:08,799 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3498 transitions. Word has length 48 [2021-12-18 20:55:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:08,800 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 3498 transitions. [2021-12-18 20:55:08,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 28 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3498 transitions. [2021-12-18 20:55:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 20:55:08,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:08,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:08,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:09,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:09,020 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1987176999, now seen corresponding path program 1 times [2021-12-18 20:55:09,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:09,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240808793] [2021-12-18 20:55:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:09,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:09,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:09,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:09,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240808793] [2021-12-18 20:55:09,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240808793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:09,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:09,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 20:55:09,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237539832] [2021-12-18 20:55:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:09,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 20:55:09,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 20:55:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:55:09,553 INFO L87 Difference]: Start difference. First operand 2695 states and 3498 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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) [2021-12-18 20:55:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:10,170 INFO L93 Difference]: Finished difference Result 3283 states and 4254 transitions. [2021-12-18 20:55:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 20:55:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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 48 [2021-12-18 20:55:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:10,175 INFO L225 Difference]: With dead ends: 3283 [2021-12-18 20:55:10,176 INFO L226 Difference]: Without dead ends: 3283 [2021-12-18 20:55:10,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2021-12-18 20:55:10,176 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1157 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:10,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 1028 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:55:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-12-18 20:55:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 3090. [2021-12-18 20:55:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 2870 states have (on average 1.3209059233449478) internal successors, (3791), 2926 states have internal predecessors, (3791), 136 states have call successors, (136), 58 states have call predecessors, (136), 58 states have return successors, (136), 105 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:55:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 4063 transitions. [2021-12-18 20:55:10,210 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 4063 transitions. Word has length 48 [2021-12-18 20:55:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:10,211 INFO L470 AbstractCegarLoop]: Abstraction has 3090 states and 4063 transitions. [2021-12-18 20:55:10,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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) [2021-12-18 20:55:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 4063 transitions. [2021-12-18 20:55:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 20:55:10,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:10,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:10,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-18 20:55:10,213 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1985329958, now seen corresponding path program 1 times [2021-12-18 20:55:10,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:10,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248940426] [2021-12-18 20:55:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:10,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:10,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:10,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:10,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248940426] [2021-12-18 20:55:10,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248940426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:10,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:10,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 20:55:10,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414754265] [2021-12-18 20:55:10,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:10,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:55:10,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:10,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:55:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:55:10,744 INFO L87 Difference]: Start difference. First operand 3090 states and 4063 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 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) [2021-12-18 20:55:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:11,088 INFO L93 Difference]: Finished difference Result 3132 states and 4102 transitions. [2021-12-18 20:55:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:55:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 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 48 [2021-12-18 20:55:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:11,092 INFO L225 Difference]: With dead ends: 3132 [2021-12-18 20:55:11,092 INFO L226 Difference]: Without dead ends: 3132 [2021-12-18 20:55:11,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:55:11,093 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 116 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:11,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 789 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:55:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-12-18 20:55:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3116. [2021-12-18 20:55:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 2896 states have (on average 1.3173342541436464) internal successors, (3815), 2952 states have internal predecessors, (3815), 136 states have call successors, (136), 58 states have call predecessors, (136), 58 states have return successors, (136), 105 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:55:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4087 transitions. [2021-12-18 20:55:11,130 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4087 transitions. Word has length 48 [2021-12-18 20:55:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:11,130 INFO L470 AbstractCegarLoop]: Abstraction has 3116 states and 4087 transitions. [2021-12-18 20:55:11,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 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) [2021-12-18 20:55:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4087 transitions. [2021-12-18 20:55:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 20:55:11,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:11,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:11,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-18 20:55:11,131 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash -894968564, now seen corresponding path program 1 times [2021-12-18 20:55:11,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:11,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198104936] [2021-12-18 20:55:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:11,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:11,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:11,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:11,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198104936] [2021-12-18 20:55:11,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198104936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644319560] [2021-12-18 20:55:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:11,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:11,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:11,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:11,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 20:55:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 20:55:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:11,506 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 [2021-12-18 20:55:11,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:55:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:11,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-12-18 20:55:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:11,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:55:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644319560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:11,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:55:11,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-12-18 20:55:11,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945508817] [2021-12-18 20:55:11,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:11,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:55:11,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:55:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:55:11,968 INFO L87 Difference]: Start difference. First operand 3116 states and 4087 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-12-18 20:55:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:12,361 INFO L93 Difference]: Finished difference Result 5247 states and 6880 transitions. [2021-12-18 20:55:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:55:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 49 [2021-12-18 20:55:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:12,370 INFO L225 Difference]: With dead ends: 5247 [2021-12-18 20:55:12,370 INFO L226 Difference]: Without dead ends: 5247 [2021-12-18 20:55:12,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-18 20:55:12,370 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 601 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:12,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 1608 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 666 Invalid, 0 Unknown, 327 Unchecked, 0.3s Time] [2021-12-18 20:55:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-12-18 20:55:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4985. [2021-12-18 20:55:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 4655 states have (on average 1.3185821697099893) internal successors, (6138), 4738 states have internal predecessors, (6138), 221 states have call successors, (221), 83 states have call predecessors, (221), 83 states have return successors, (221), 163 states have call predecessors, (221), 221 states have call successors, (221) [2021-12-18 20:55:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 6580 transitions. [2021-12-18 20:55:12,431 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 6580 transitions. Word has length 49 [2021-12-18 20:55:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:12,432 INFO L470 AbstractCegarLoop]: Abstraction has 4985 states and 6580 transitions. [2021-12-18 20:55:12,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-12-18 20:55:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 6580 transitions. [2021-12-18 20:55:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 20:55:12,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:12,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:12,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:12,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-18 20:55:12,650 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -894968563, now seen corresponding path program 1 times [2021-12-18 20:55:12,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:12,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819244551] [2021-12-18 20:55:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:12,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:12,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819244551] [2021-12-18 20:55:12,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819244551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542113453] [2021-12-18 20:55:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:12,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:12,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:12,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 20:55:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 20:55:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:13,116 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 [2021-12-18 20:55:13,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:55:13,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:55:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:13,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-12-18 20:55:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:13,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-18 20:55:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:13,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:55:13,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542113453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:13,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:55:13,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2021-12-18 20:55:13,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197924340] [2021-12-18 20:55:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:13,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:55:13,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:55:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:55:13,765 INFO L87 Difference]: Start difference. First operand 4985 states and 6580 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-12-18 20:55:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:14,153 INFO L93 Difference]: Finished difference Result 5161 states and 6761 transitions. [2021-12-18 20:55:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:55:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 49 [2021-12-18 20:55:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:14,162 INFO L225 Difference]: With dead ends: 5161 [2021-12-18 20:55:14,162 INFO L226 Difference]: Without dead ends: 5161 [2021-12-18 20:55:14,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:55:14,163 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 681 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:14,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1024 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 318 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2021-12-18 20:55:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-12-18 20:55:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4981. [2021-12-18 20:55:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4981 states, 4651 states have (on average 1.318426144915072) internal successors, (6132), 4734 states have internal predecessors, (6132), 221 states have call successors, (221), 83 states have call predecessors, (221), 83 states have return successors, (221), 163 states have call predecessors, (221), 221 states have call successors, (221) [2021-12-18 20:55:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 6574 transitions. [2021-12-18 20:55:14,207 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 6574 transitions. Word has length 49 [2021-12-18 20:55:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:14,207 INFO L470 AbstractCegarLoop]: Abstraction has 4981 states and 6574 transitions. [2021-12-18 20:55:14,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-12-18 20:55:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 6574 transitions. [2021-12-18 20:55:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 20:55:14,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:14,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:14,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-18 20:55:14,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-18 20:55:14,426 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1838091552, now seen corresponding path program 1 times [2021-12-18 20:55:14,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:14,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279164815] [2021-12-18 20:55:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:14,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:14,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:14,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:14,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279164815] [2021-12-18 20:55:14,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279164815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:14,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:14,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 20:55:14,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033273510] [2021-12-18 20:55:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:14,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:55:14,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:55:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:55:14,685 INFO L87 Difference]: Start difference. First operand 4981 states and 6574 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2021-12-18 20:55:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:14,912 INFO L93 Difference]: Finished difference Result 5021 states and 6540 transitions. [2021-12-18 20:55:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:55:14,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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 50 [2021-12-18 20:55:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:14,921 INFO L225 Difference]: With dead ends: 5021 [2021-12-18 20:55:14,921 INFO L226 Difference]: Without dead ends: 5021 [2021-12-18 20:55:14,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:55:14,922 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 1336 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:14,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 835 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:55:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-12-18 20:55:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 4879. [2021-12-18 20:55:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 4551 states have (on average 1.3082838936497474) internal successors, (5954), 4633 states have internal predecessors, (5954), 219 states have call successors, (219), 83 states have call predecessors, (219), 83 states have return successors, (219), 162 states have call predecessors, (219), 219 states have call successors, (219) [2021-12-18 20:55:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6392 transitions. [2021-12-18 20:55:14,987 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6392 transitions. Word has length 50 [2021-12-18 20:55:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:14,987 INFO L470 AbstractCegarLoop]: Abstraction has 4879 states and 6392 transitions. [2021-12-18 20:55:14,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2021-12-18 20:55:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6392 transitions. [2021-12-18 20:55:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 20:55:14,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:14,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:14,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-18 20:55:14,990 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2031481280, now seen corresponding path program 1 times [2021-12-18 20:55:14,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:14,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225153233] [2021-12-18 20:55:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:14,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:15,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:15,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225153233] [2021-12-18 20:55:15,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225153233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427478000] [2021-12-18 20:55:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:15,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:15,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:15,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 20:55:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 20:55:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:15,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:55:15,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427478000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:15,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:55:15,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-18 20:55:15,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484174842] [2021-12-18 20:55:15,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:15,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:55:15,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:55:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:55:15,255 INFO L87 Difference]: Start difference. First operand 4879 states and 6392 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-12-18 20:55:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:15,279 INFO L93 Difference]: Finished difference Result 6033 states and 7948 transitions. [2021-12-18 20:55:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:55:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 50 [2021-12-18 20:55:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:15,288 INFO L225 Difference]: With dead ends: 6033 [2021-12-18 20:55:15,288 INFO L226 Difference]: Without dead ends: 6033 [2021-12-18 20:55:15,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:55:15,289 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 208 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:15,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 330 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:55:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6033 states. [2021-12-18 20:55:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6033 to 5842. [2021-12-18 20:55:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5842 states, 5488 states have (on average 1.3199708454810495) internal successors, (7244), 5565 states have internal predecessors, (7244), 245 states have call successors, (245), 83 states have call predecessors, (245), 83 states have return successors, (245), 193 states have call predecessors, (245), 245 states have call successors, (245) [2021-12-18 20:55:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 7734 transitions. [2021-12-18 20:55:15,354 INFO L78 Accepts]: Start accepts. Automaton has 5842 states and 7734 transitions. Word has length 50 [2021-12-18 20:55:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:15,354 INFO L470 AbstractCegarLoop]: Abstraction has 5842 states and 7734 transitions. [2021-12-18 20:55:15,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-12-18 20:55:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5842 states and 7734 transitions. [2021-12-18 20:55:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:55:15,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:15,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:15,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:15,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 20:55:15,573 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:15,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1111433432, now seen corresponding path program 1 times [2021-12-18 20:55:15,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:15,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306858319] [2021-12-18 20:55:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:15,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:16,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:16,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-18 20:55:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:55:16,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:16,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306858319] [2021-12-18 20:55:16,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306858319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:16,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:16,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-18 20:55:16,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165649909] [2021-12-18 20:55:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:16,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 20:55:16,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:16,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 20:55:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:55:16,072 INFO L87 Difference]: Start difference. First operand 5842 states and 7734 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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) [2021-12-18 20:55:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:17,210 INFO L93 Difference]: Finished difference Result 6194 states and 8118 transitions. [2021-12-18 20:55:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 20:55:17,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 51 [2021-12-18 20:55:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:17,220 INFO L225 Difference]: With dead ends: 6194 [2021-12-18 20:55:17,220 INFO L226 Difference]: Without dead ends: 6190 [2021-12-18 20:55:17,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 20:55:17,221 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 1185 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:17,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 2003 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:55:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6190 states. [2021-12-18 20:55:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6190 to 5772. [2021-12-18 20:55:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5772 states, 5420 states have (on average 1.3169741697416975) internal successors, (7138), 5497 states have internal predecessors, (7138), 243 states have call successors, (243), 83 states have call predecessors, (243), 83 states have return successors, (243), 191 states have call predecessors, (243), 243 states have call successors, (243) [2021-12-18 20:55:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5772 states to 5772 states and 7624 transitions. [2021-12-18 20:55:17,304 INFO L78 Accepts]: Start accepts. Automaton has 5772 states and 7624 transitions. Word has length 51 [2021-12-18 20:55:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:17,304 INFO L470 AbstractCegarLoop]: Abstraction has 5772 states and 7624 transitions. [2021-12-18 20:55:17,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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) [2021-12-18 20:55:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5772 states and 7624 transitions. [2021-12-18 20:55:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:55:17,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:17,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:17,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-18 20:55:17,305 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash -38812235, now seen corresponding path program 1 times [2021-12-18 20:55:17,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:17,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080323546] [2021-12-18 20:55:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:17,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:55:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:17,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080323546] [2021-12-18 20:55:17,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080323546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:17,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:17,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:55:17,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082980645] [2021-12-18 20:55:17,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:17,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:55:17,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:55:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:55:17,362 INFO L87 Difference]: Start difference. First operand 5772 states and 7624 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-12-18 20:55:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:17,382 INFO L93 Difference]: Finished difference Result 6922 states and 9246 transitions. [2021-12-18 20:55:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:55:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 51 [2021-12-18 20:55:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:17,390 INFO L225 Difference]: With dead ends: 6922 [2021-12-18 20:55:17,390 INFO L226 Difference]: Without dead ends: 6922 [2021-12-18 20:55:17,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:55:17,391 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 120 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:17,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 453 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:55:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-12-18 20:55:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 4899. [2021-12-18 20:55:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4899 states, 4595 states have (on average 1.312948857453754) internal successors, (6033), 4663 states have internal predecessors, (6033), 206 states have call successors, (206), 72 states have call predecessors, (206), 72 states have return successors, (206), 163 states have call predecessors, (206), 206 states have call successors, (206) [2021-12-18 20:55:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4899 states to 4899 states and 6445 transitions. [2021-12-18 20:55:17,449 INFO L78 Accepts]: Start accepts. Automaton has 4899 states and 6445 transitions. Word has length 51 [2021-12-18 20:55:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:17,449 INFO L470 AbstractCegarLoop]: Abstraction has 4899 states and 6445 transitions. [2021-12-18 20:55:17,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-12-18 20:55:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4899 states and 6445 transitions. [2021-12-18 20:55:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:55:17,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:17,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:17,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-18 20:55:17,451 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash -86585480, now seen corresponding path program 1 times [2021-12-18 20:55:17,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:17,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822498085] [2021-12-18 20:55:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:17,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:17,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:55:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:17,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822498085] [2021-12-18 20:55:17,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822498085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630396293] [2021-12-18 20:55:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:17,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:17,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:17,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 20:55:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 20:55:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:17,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:55:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:55:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:55:18,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630396293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:55:18,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:55:18,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2021-12-18 20:55:18,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736023591] [2021-12-18 20:55:18,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:18,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:55:18,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:55:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:55:18,140 INFO L87 Difference]: Start difference. First operand 4899 states and 6445 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 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) [2021-12-18 20:55:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:18,661 INFO L93 Difference]: Finished difference Result 7006 states and 9260 transitions. [2021-12-18 20:55:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 20:55:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 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) Word has length 52 [2021-12-18 20:55:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:18,690 INFO L225 Difference]: With dead ends: 7006 [2021-12-18 20:55:18,690 INFO L226 Difference]: Without dead ends: 6998 [2021-12-18 20:55:18,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:55:18,692 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 656 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:18,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 1310 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:55:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-12-18 20:55:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4923. [2021-12-18 20:55:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4923 states, 4619 states have (on average 1.3106733059103701) internal successors, (6054), 4687 states have internal predecessors, (6054), 206 states have call successors, (206), 72 states have call predecessors, (206), 72 states have return successors, (206), 163 states have call predecessors, (206), 206 states have call successors, (206) [2021-12-18 20:55:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 6466 transitions. [2021-12-18 20:55:18,760 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 6466 transitions. Word has length 52 [2021-12-18 20:55:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:18,761 INFO L470 AbstractCegarLoop]: Abstraction has 4923 states and 6466 transitions. [2021-12-18 20:55:18,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 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) [2021-12-18 20:55:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 6466 transitions. [2021-12-18 20:55:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:55:18,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:18,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:18,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:18,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-18 20:55:18,976 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1958066468, now seen corresponding path program 1 times [2021-12-18 20:55:18,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089038090] [2021-12-18 20:55:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:18,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:19,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:19,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089038090] [2021-12-18 20:55:19,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089038090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:19,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57184404] [2021-12-18 20:55:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:19,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:19,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:19,353 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:19,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 20:55:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 20:55:19,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:19,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:55:19,602 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 [2021-12-18 20:55:19,702 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 [2021-12-18 20:55:19,717 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 [2021-12-18 20:55:19,744 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 [2021-12-18 20:55:19,972 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:55:19,973 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 23 treesize of output 30 [2021-12-18 20:55:20,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:20,412 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-12-18 20:55:20,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 79 [2021-12-18 20:55:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:20,419 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 37 treesize of output 36 [2021-12-18 20:55:20,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:20,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 37 [2021-12-18 20:55:20,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 20:55:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:21,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:55:21,387 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 74 treesize of output 77 [2021-12-18 20:55:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57184404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:30,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:55:30,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-12-18 20:55:30,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355102067] [2021-12-18 20:55:30,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:30,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 20:55:30,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 20:55:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1645, Unknown=11, NotChecked=0, Total=1806 [2021-12-18 20:55:30,293 INFO L87 Difference]: Start difference. First operand 4923 states and 6466 transitions. Second operand has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:33,682 INFO L93 Difference]: Finished difference Result 6242 states and 8171 transitions. [2021-12-18 20:55:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 20:55:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 2 states have call successors, (2), 2 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 52 [2021-12-18 20:55:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:33,694 INFO L225 Difference]: With dead ends: 6242 [2021-12-18 20:55:33,695 INFO L226 Difference]: Without dead ends: 6242 [2021-12-18 20:55:33,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=813, Invalid=5982, Unknown=11, NotChecked=0, Total=6806 [2021-12-18 20:55:33,696 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 892 mSDsluCounter, 3694 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 3923 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:33,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 3923 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1860 Invalid, 0 Unknown, 232 Unchecked, 1.0s Time] [2021-12-18 20:55:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6242 states. [2021-12-18 20:55:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6242 to 5112. [2021-12-18 20:55:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 4795 states have (on average 1.3111574556830032) internal successors, (6287), 4866 states have internal predecessors, (6287), 214 states have call successors, (214), 77 states have call predecessors, (214), 77 states have return successors, (214), 168 states have call predecessors, (214), 214 states have call successors, (214) [2021-12-18 20:55:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 6715 transitions. [2021-12-18 20:55:33,754 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 6715 transitions. Word has length 52 [2021-12-18 20:55:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:33,754 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 6715 transitions. [2021-12-18 20:55:33,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 6715 transitions. [2021-12-18 20:55:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:55:33,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:33,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:33,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:33,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:33,984 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1148719842, now seen corresponding path program 1 times [2021-12-18 20:55:33,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562601976] [2021-12-18 20:55:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:33,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:34,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:34,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562601976] [2021-12-18 20:55:34,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562601976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293226719] [2021-12-18 20:55:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:34,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:34,216 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:34,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 20:55:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 20:55:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:34,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:55:34,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:34,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-18 20:55:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:34,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:55:34,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293226719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:34,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:55:34,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-12-18 20:55:34,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057366241] [2021-12-18 20:55:34,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:34,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:55:34,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:55:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:55:34,910 INFO L87 Difference]: Start difference. First operand 5112 states and 6715 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2021-12-18 20:55:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:35,189 INFO L93 Difference]: Finished difference Result 5277 states and 6884 transitions. [2021-12-18 20:55:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:55:35,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 52 [2021-12-18 20:55:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:35,198 INFO L225 Difference]: With dead ends: 5277 [2021-12-18 20:55:35,198 INFO L226 Difference]: Without dead ends: 5277 [2021-12-18 20:55:35,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-18 20:55:35,199 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 653 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:35,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 935 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 214 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-12-18 20:55:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2021-12-18 20:55:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 5108. [2021-12-18 20:55:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 4791 states have (on average 1.31141724065957) internal successors, (6283), 4862 states have internal predecessors, (6283), 214 states have call successors, (214), 77 states have call predecessors, (214), 77 states have return successors, (214), 168 states have call predecessors, (214), 214 states have call successors, (214) [2021-12-18 20:55:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 6711 transitions. [2021-12-18 20:55:35,289 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 6711 transitions. Word has length 52 [2021-12-18 20:55:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:35,290 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 6711 transitions. [2021-12-18 20:55:35,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2021-12-18 20:55:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 6711 transitions. [2021-12-18 20:55:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 20:55:35,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:35,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:35,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:35,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:35,523 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:35,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:35,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1366968916, now seen corresponding path program 1 times [2021-12-18 20:55:35,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:35,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458531237] [2021-12-18 20:55:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:35,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:35,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-18 20:55:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:55:35,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:35,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458531237] [2021-12-18 20:55:35,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458531237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:35,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242739161] [2021-12-18 20:55:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:35,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:35,628 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:35,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 20:55:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:55:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:36,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:55:36,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242739161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:36,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:55:36,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2021-12-18 20:55:36,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870625296] [2021-12-18 20:55:36,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:36,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:55:36,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:55:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:55:36,065 INFO L87 Difference]: Start difference. First operand 5108 states and 6711 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:36,342 INFO L93 Difference]: Finished difference Result 5681 states and 7363 transitions. [2021-12-18 20:55:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:55:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 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 53 [2021-12-18 20:55:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:36,348 INFO L225 Difference]: With dead ends: 5681 [2021-12-18 20:55:36,348 INFO L226 Difference]: Without dead ends: 5681 [2021-12-18 20:55:36,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-12-18 20:55:36,350 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 678 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:36,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 442 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:55:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2021-12-18 20:55:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 5106. [2021-12-18 20:55:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5106 states, 4791 states have (on average 1.300563556668754) internal successors, (6231), 4860 states have internal predecessors, (6231), 214 states have call successors, (214), 77 states have call predecessors, (214), 77 states have return successors, (214), 168 states have call predecessors, (214), 214 states have call successors, (214) [2021-12-18 20:55:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5106 states to 5106 states and 6659 transitions. [2021-12-18 20:55:36,397 INFO L78 Accepts]: Start accepts. Automaton has 5106 states and 6659 transitions. Word has length 53 [2021-12-18 20:55:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:36,397 INFO L470 AbstractCegarLoop]: Abstraction has 5106 states and 6659 transitions. [2021-12-18 20:55:36,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5106 states and 6659 transitions. [2021-12-18 20:55:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 20:55:36,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:36,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:36,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:36,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:36,615 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash 633585951, now seen corresponding path program 1 times [2021-12-18 20:55:36,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:36,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39643885] [2021-12-18 20:55:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:36,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:37,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:37,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 20:55:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:55:37,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39643885] [2021-12-18 20:55:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39643885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175627685] [2021-12-18 20:55:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:37,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:37,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:37,024 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:37,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 20:55:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-18 20:55:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:37,399 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 20:55:37,400 INFO L388 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 21 [2021-12-18 20:55:37,515 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 [2021-12-18 20:55:37,520 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 [2021-12-18 20:55:37,541 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 [2021-12-18 20:55:37,551 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 [2021-12-18 20:55:37,571 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 [2021-12-18 20:55:37,580 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 [2021-12-18 20:55:37,772 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:55:37,772 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 1 case distinctions, treesize of input 23 treesize of output 30 [2021-12-18 20:55:37,784 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:55:37,784 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 23 treesize of output 30 [2021-12-18 20:55:37,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:37,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-18 20:55:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:38,108 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 33 treesize of output 28 [2021-12-18 20:55:38,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:38,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-12-18 20:55:38,354 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-18 20:55:38,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-18 20:55:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:38,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:38,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175627685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:38,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:55:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 33 [2021-12-18 20:55:38,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634223490] [2021-12-18 20:55:38,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 20:55:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 20:55:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 20:55:38,545 INFO L87 Difference]: Start difference. First operand 5106 states and 6659 transitions. Second operand has 34 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:55:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:41,194 INFO L93 Difference]: Finished difference Result 10089 states and 13325 transitions. [2021-12-18 20:55:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 20:55:41,194 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2021-12-18 20:55:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:41,205 INFO L225 Difference]: With dead ends: 10089 [2021-12-18 20:55:41,206 INFO L226 Difference]: Without dead ends: 10089 [2021-12-18 20:55:41,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1040, Invalid=5440, Unknown=0, NotChecked=0, Total=6480 [2021-12-18 20:55:41,207 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 3070 mSDsluCounter, 3785 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3076 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:41,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3076 Valid, 3990 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2317 Invalid, 0 Unknown, 577 Unchecked, 1.0s Time] [2021-12-18 20:55:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2021-12-18 20:55:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 6191. [2021-12-18 20:55:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6191 states, 5831 states have (on average 1.2884582404390328) internal successors, (7513), 5904 states have internal predecessors, (7513), 254 states have call successors, (254), 82 states have call predecessors, (254), 82 states have return successors, (254), 204 states have call predecessors, (254), 254 states have call successors, (254) [2021-12-18 20:55:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 8021 transitions. [2021-12-18 20:55:41,290 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 8021 transitions. Word has length 53 [2021-12-18 20:55:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:41,290 INFO L470 AbstractCegarLoop]: Abstraction has 6191 states and 8021 transitions. [2021-12-18 20:55:41,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:55:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 8021 transitions. [2021-12-18 20:55:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 20:55:41,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:41,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:41,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:41,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:41,509 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash 633585952, now seen corresponding path program 1 times [2021-12-18 20:55:41,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:41,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545727475] [2021-12-18 20:55:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:41,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:42,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 20:55:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:55:42,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545727475] [2021-12-18 20:55:42,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545727475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964543232] [2021-12-18 20:55:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:42,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:42,213 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:42,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 20:55:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-18 20:55:42,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:42,554 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 20:55:42,555 INFO L388 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 21 [2021-12-18 20:55:42,565 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 6 treesize of output 5 [2021-12-18 20:55:42,712 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 [2021-12-18 20:55:42,722 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 [2021-12-18 20:55:42,764 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 [2021-12-18 20:55:42,777 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 [2021-12-18 20:55:42,799 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 [2021-12-18 20:55:42,810 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 [2021-12-18 20:55:43,073 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:55:43,073 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 1 case distinctions, treesize of input 23 treesize of output 30 [2021-12-18 20:55:43,082 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-18 20:55:43,082 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 23 treesize of output 22 [2021-12-18 20:55:43,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:43,386 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2021-12-18 20:55:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:43,395 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 [2021-12-18 20:55:43,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:43,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:55:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:43,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-12-18 20:55:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:43,744 INFO L388 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 12 treesize of output 14 [2021-12-18 20:55:43,753 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 20:55:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 20:55:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:43,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:44,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964543232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:44,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:55:44,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 34 [2021-12-18 20:55:44,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960602230] [2021-12-18 20:55:44,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:44,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 20:55:44,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 20:55:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 20:55:44,216 INFO L87 Difference]: Start difference. First operand 6191 states and 8021 transitions. Second operand has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:55:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:48,835 INFO L93 Difference]: Finished difference Result 9295 states and 12204 transitions. [2021-12-18 20:55:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 20:55:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2021-12-18 20:55:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:48,856 INFO L225 Difference]: With dead ends: 9295 [2021-12-18 20:55:48,857 INFO L226 Difference]: Without dead ends: 9295 [2021-12-18 20:55:48,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1318, Invalid=6872, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 20:55:48,865 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 4470 mSDsluCounter, 3054 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4474 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:48,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4474 Valid, 3249 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2349 Invalid, 0 Unknown, 644 Unchecked, 1.3s Time] [2021-12-18 20:55:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2021-12-18 20:55:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 6247. [2021-12-18 20:55:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 5883 states have (on average 1.2758796532381438) internal successors, (7506), 5956 states have internal predecessors, (7506), 254 states have call successors, (254), 86 states have call predecessors, (254), 86 states have return successors, (254), 204 states have call predecessors, (254), 254 states have call successors, (254) [2021-12-18 20:55:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 8014 transitions. [2021-12-18 20:55:48,939 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 8014 transitions. Word has length 53 [2021-12-18 20:55:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:48,939 INFO L470 AbstractCegarLoop]: Abstraction has 6247 states and 8014 transitions. [2021-12-18 20:55:48,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 33 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 20:55:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 8014 transitions. [2021-12-18 20:55:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 20:55:48,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:48,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:48,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-18 20:55:49,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:49,157 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash 385346035, now seen corresponding path program 1 times [2021-12-18 20:55:49,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583968329] [2021-12-18 20:55:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:49,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:49,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:55:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:49,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 20:55:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:55:49,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:49,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583968329] [2021-12-18 20:55:49,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583968329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668678059] [2021-12-18 20:55:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:49,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:49,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:49,240 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:49,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 20:55:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 20:55:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:49,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:55:49,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:49,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:55:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:55:49,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:55:49,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668678059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:49,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:55:49,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-18 20:55:49,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003389278] [2021-12-18 20:55:49,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:49,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:55:49,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:55:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:55:49,571 INFO L87 Difference]: Start difference. First operand 6247 states and 8014 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:49,788 INFO L93 Difference]: Finished difference Result 5827 states and 7416 transitions. [2021-12-18 20:55:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:55:49,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 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 54 [2021-12-18 20:55:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:49,793 INFO L225 Difference]: With dead ends: 5827 [2021-12-18 20:55:49,793 INFO L226 Difference]: Without dead ends: 5827 [2021-12-18 20:55:49,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:55:49,794 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 214 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:49,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1109 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:55:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-12-18 20:55:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5334. [2021-12-18 20:55:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5334 states, 5032 states have (on average 1.2700715421303657) internal successors, (6391), 5089 states have internal predecessors, (6391), 211 states have call successors, (211), 67 states have call predecessors, (211), 67 states have return successors, (211), 177 states have call predecessors, (211), 211 states have call successors, (211) [2021-12-18 20:55:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5334 states to 5334 states and 6813 transitions. [2021-12-18 20:55:49,843 INFO L78 Accepts]: Start accepts. Automaton has 5334 states and 6813 transitions. Word has length 54 [2021-12-18 20:55:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 5334 states and 6813 transitions. [2021-12-18 20:55:49,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:55:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5334 states and 6813 transitions. [2021-12-18 20:55:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 20:55:49,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:49,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:49,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 20:55:50,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:50,059 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1487364529, now seen corresponding path program 1 times [2021-12-18 20:55:50,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444262866] [2021-12-18 20:55:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:50,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:50,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:50,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444262866] [2021-12-18 20:55:50,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444262866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:50,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786988153] [2021-12-18 20:55:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:50,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:50,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:50,127 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:50,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 20:55:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:55:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:50,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:50,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786988153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:55:50,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:55:50,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2021-12-18 20:55:50,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820237315] [2021-12-18 20:55:50,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:50,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:55:50,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:55:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:55:50,380 INFO L87 Difference]: Start difference. First operand 5334 states and 6813 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-12-18 20:55:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:50,416 INFO L93 Difference]: Finished difference Result 9435 states and 12123 transitions. [2021-12-18 20:55:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:55:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 55 [2021-12-18 20:55:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:50,425 INFO L225 Difference]: With dead ends: 9435 [2021-12-18 20:55:50,425 INFO L226 Difference]: Without dead ends: 9435 [2021-12-18 20:55:50,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:55:50,426 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 365 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:50,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 531 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:55:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9435 states. [2021-12-18 20:55:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9435 to 7672. [2021-12-18 20:55:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7271 states have (on average 1.2826296245358273) internal successors, (9326), 7344 states have internal predecessors, (9326), 311 states have call successors, (311), 66 states have call predecessors, (311), 66 states have return successors, (311), 261 states have call predecessors, (311), 311 states have call successors, (311) [2021-12-18 20:55:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 9948 transitions. [2021-12-18 20:55:50,535 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 9948 transitions. Word has length 55 [2021-12-18 20:55:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:50,536 INFO L470 AbstractCegarLoop]: Abstraction has 7672 states and 9948 transitions. [2021-12-18 20:55:50,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-12-18 20:55:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 9948 transitions. [2021-12-18 20:55:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:55:50,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:50,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:50,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:50,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 20:55:50,747 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:55:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1136338587, now seen corresponding path program 1 times [2021-12-18 20:55:50,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:50,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115505686] [2021-12-18 20:55:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:50,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:51,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:51,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115505686] [2021-12-18 20:55:51,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115505686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:51,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146823213] [2021-12-18 20:55:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:51,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:51,814 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:51,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 20:55:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:51,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 20:55:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:52,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:52,310 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 [2021-12-18 20:55:52,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:52,336 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 [2021-12-18 20:55:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:52,349 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 [2021-12-18 20:55:52,550 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 20:55:52,550 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 23 treesize of output 30 [2021-12-18 20:55:52,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:52,915 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-12-18 20:55:52,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 75 [2021-12-18 20:55:52,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:52,921 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 37 treesize of output 36 [2021-12-18 20:55:53,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-18 20:55:53,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:55:53,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-12-18 20:55:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:53,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:56,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:55:56,378 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 74 treesize of output 77 [2021-12-18 20:56:12,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146823213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:56:12,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:56:12,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 37 [2021-12-18 20:56:12,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432746226] [2021-12-18 20:56:12,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:56:12,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 20:56:12,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:56:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 20:56:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2462, Unknown=11, NotChecked=0, Total=2652 [2021-12-18 20:56:12,655 INFO L87 Difference]: Start difference. First operand 7672 states and 9948 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:56:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:56:14,844 INFO L93 Difference]: Finished difference Result 7798 states and 10106 transitions. [2021-12-18 20:56:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 20:56:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 2 states have call successors, (2), 2 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 56 [2021-12-18 20:56:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:56:14,853 INFO L225 Difference]: With dead ends: 7798 [2021-12-18 20:56:14,853 INFO L226 Difference]: Without dead ends: 7787 [2021-12-18 20:56:14,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=454, Invalid=4647, Unknown=11, NotChecked=0, Total=5112 [2021-12-18 20:56:14,854 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 225 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:56:14,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 2518 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1019 Invalid, 0 Unknown, 582 Unchecked, 0.6s Time] [2021-12-18 20:56:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7787 states. [2021-12-18 20:56:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7787 to 7672. [2021-12-18 20:56:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7271 states have (on average 1.2824920918718195) internal successors, (9325), 7344 states have internal predecessors, (9325), 311 states have call successors, (311), 66 states have call predecessors, (311), 66 states have return successors, (311), 261 states have call predecessors, (311), 311 states have call successors, (311) [2021-12-18 20:56:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 9947 transitions. [2021-12-18 20:56:14,929 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 9947 transitions. Word has length 56 [2021-12-18 20:56:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:56:14,929 INFO L470 AbstractCegarLoop]: Abstraction has 7672 states and 9947 transitions. [2021-12-18 20:56:14,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:56:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 9947 transitions. [2021-12-18 20:56:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:56:14,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:56:14,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:56:14,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-18 20:56:15,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 20:56:15,143 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-18 20:56:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:56:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1394504025, now seen corresponding path program 1 times [2021-12-18 20:56:15,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:56:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9464876] [2021-12-18 20:56:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:56:15,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:56:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:56:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:56:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:56:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:56:15,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:56:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9464876] [2021-12-18 20:56:15,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9464876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:56:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58057627] [2021-12-18 20:56:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:56:15,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:56:15,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:56:15,416 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:56:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 20:56:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:56:15,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 20:56:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:56:15,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:56:16,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:56:16,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2021-12-18 20:56:16,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 15 treesize of output 5 [2021-12-18 20:56:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:56:16,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:56:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-12-18 20:56:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2021-12-18 20:56:58,776 WARN L227 SmtUtils]: Spent 36.20s on a formula simplification. DAG size of input: 43 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:57:19,139 WARN L227 SmtUtils]: Spent 20.09s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:57:41,392 WARN L227 SmtUtils]: Spent 20.11s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:58:01,118 WARN L227 SmtUtils]: Spent 16.73s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:58:20,828 WARN L227 SmtUtils]: Spent 14.71s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15